NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17

Posted by: DerekHV

NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 11/12/2017 10:20

The first real heatwave of the season to commence tomorrow, with the far west of the state affected initially, before that airmass is gradually directed towards the central east regions.

http://www.weatherzone.com.au/news/mid-week-heat-for-the-southeast/527229

We should see our first 40 degree days of the season in the Hunter and western Sydney, after an unusual lack of any very hot days during November. (hottest day only 32.2C here or 90F)
Thursday looking like the peak, before a brief southerly and another very hot weekend.
The coast should be spared of any days >35C.
This heat could continue longer as well, as Sunday the heat starts to intensify again in the usual suspect hotspots in the far west.
Posted by: ozthunder

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 11/12/2017 10:32

I am hoping that the seabreeze front on Friday will kick off a few thunderstorms, probably high based stuff, but may provide lightning and microbursts. CAPPING will be the greatest obstacle. As the weekend progresses the more humid E/NE winds move further inland and storms may become more widespread.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 08:37

Warm with clear skies, cicadas and little or no wind.

Access is showing a hot weather pattern for our part of the world lasting until the end of its run, interrupted of the coast by weak Southerly changes. It shows an inland trough / low developing early next week with widespread rain and probably storms.

GFS doesn't have the trough and low for early next week, but the weekend looks a bit unstable / troughy. The second week of GFS looks warm and unsettled. NAEFS shows temps over virtually all of Australia for next week as 'near normal': NAEFS. Not quite sure what to make of that.

GFS 850 temps over Sydney on Thursday 14th up to 25. The Westerly component looks reasonably strong so the sea breeze might not be as strong and heat might reach the coast. Access looks similar for Thursday.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 08:48

Yeah there doesn't seem to be much end to this hot weather in the near future. It's not that often we get a warm December like this, mostly in my experience it can be cool and miserable and mainly devoid of hot days.

Cool November has abruptly turned to a hot December. Canberra is forecasted to be above 30°C all week which is quite hot.

Originally Posted By: Steve777
Warm with clear skies, cicadas and little or no wind.


Full cloud cover and fog on top of the escarpment here. We must've got the edge of that weak southerly that was moving up the coast yesterday since the low cloud cover also rolled in about 7pm yesterday. But it's the kind of stuff that will burn off rapidly once conditions warm up.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 09:05

Just after my last post a bit of scattered cloud moved in, fluffy white clouds with dark bases. The sea breeze is just getting started, so that will limit warming near the coast today.

I note that sea temps off the coast have warmed to about 21 near Sydney, although days on end of coastal NE'ers might send it tumbling again.

======

December can be a bit of a mixed bag. December 2005 was classic 'Summer', with 10 30+ days at OH (average 3) and equal hottest on max record (28.6, 3 above). Dry sunny day followed dry sunny day, like a classic Christmas holiday of fond memory. December last year was very warm (max 2.5 above average at OH, 7 30+ days) but cloudier. On the other hand, Decembers 1999 and 2011 were shockers.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 09:10

Unfortunately day after day of heat gets the house temp up - no cooler nights in between.

Gunna be a hot week or more.

Still it is Summer and that's what happens I suppose smile
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 10:03

Originally Posted By: Steve777

December can be a bit of a mixed bag. December 2005 was classic 'Summer', with 10 30+ days at OH (average 3) and equal hottest on max record (28.6, 3 above). Dry sunny day followed dry sunny day, like a classic Christmas holiday of fond memory. December last year was very warm (max 2.5 above average at OH, 7 30+ days) but cloudier. On the other hand, Decembers 1999 and 2011 were shockers.


Yeah December can be very variable as the 1st month of summer, almost November-like sometimes for variability.
I can recall some very cool Decembers in the mid 90s, '94-'95. (was living in Camden back then). 1995 it was cold right up until Xmas. 1994 had 1 40 degree day though (up to 44C in far western Sydney -some records still stand), from memory it was many years later that another 40 degree day occurred in December.
December 1999 was cool, and that summer (99-00) was cool right up until February when it turned around. (24 out of 29 days above average).
Recent years since after 2011 have been fairly close to average, with no real standouts.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 15:04

Its gonna get hot out this way, going for 41c on Thursday but given the 850hPa temps are potentially touching 26c I wouldn't be surprised if that ends up more like 42-43. AWS record for Penrith is 42.3 so it could give that a bit of a shake.



Saturday will probably crack 40c and Monday,Tuesday next week are going to get toasty as well looking at the forecast models. We could well end up with 3 40c days in the space of less than a week out this way which will come as a bit of a shock to the system!
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 15:28

After weeks of cool weather , I'm looking forward to a few days of warmth.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 16:56

I see that the EC-7 day model is no longer shown on this site, but the EC-10D model has been expanded to show all of Australia.

===

Blue skies and sea gales here, probably around 26.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 18:48

I'm sure many people out Penrith way aren't looking forward to this dreadful heat
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 19:19

Originally Posted By: rain gauge
I'm sure many people out Penrith way aren't looking forward to this dreadful heat


Yes but it gets hot every summer in Penrith, often for days on end. Hot weather is just part of life out there.

In terms of that forecast that davidg has posted up, I would say Thursday is looking like one of the more comfortable days, as it will be very low humidity. Saturday looks like the worst with 39C and dew points of 20C, yuckkk.

We have had a good run of pretty average temperatures, so a run of well above average temps was always going to occur. It's just like at some point there will be a week of miserable weather with cool southerly winds.
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 19:27

Just a stock standard average spike for this time of year which the media will blow out of proportion just like they do with every storm day laugh

In all seriousness, it's actually a pretty late onset of heat considering we're 9 days from the summer solstice. In recent years we'd already see a handful of 37+ days in the west.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 19:30

Trust me you never get used to the heat out Penrith way. Many people don't have aircon or cant afford to run it. Heat isn't all fun and games for many people
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 19:43

Exactly LRH, people who don't like the hot weather have been lucky. I would not like high 30's and 40's every day, but I do enjoy periodic hot weather.

Like Kino I'm looking forward to it, should hopefully be our warmest day since October 30th. And it will be dry heat anyway.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 22:09

Originally Posted By: rain gauge
Trust me you never get used to the heat out Penrith way. Many people don't have aircon or cant afford to run it. Heat isn't all fun and games for many people


Exactly.
I actually have air-con but cannot afford to run it much such are the outrageous prices of electricity these days. This weather is putrid, both for the comfort value and the wallet.

At the same time, I'm more than happy to put up with this [censored] and let the heat lovers have their moments of glory during the hottest time of the year. Nothing I can do to change it, so, I have learnt over decades to just deal with it.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 12/12/2017 23:28

Our air con is out of order so the mild weather has been a bit of a blessing. But, I'm looking forward to it because it's a change from the incessant NE winds and lack of heat we had in November.

Lucky the nights have been nice and cool (here at least), like tonight we have all the windows open getting rid of the day's heat. smile
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 05:49

Originally Posted By: Long Road Home
Just a stock standard average spike for this time of year which the media will blow out of proportion just like they do with every storm day laugh

In all seriousness, it's actually a pretty late onset of heat considering we're 9 days from the summer solstice. In recent years we'd already see a handful of 37+ days in the west.


Yeah the term "heatwave" is a relative one, and it is late this year to finally get temps over 35C.
If I saw this week of temps coming up in late January, it would probably just be classed as an above average week. (average max of 36C for 1 week here, 37C for places like Penrith and Singleton.) It would probably just be a stock standard top 14% of 1 weeks percentile.
The fact that it has come from nowhere, and may continue, makes it more newsworthy.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 08:09

I've lived in the Lower BM's my whole life and you don't really get used to the heat, you just learn to tolerate it.

It doesn't matter who you are, a 41c day is going to pretty much be a write off for any outdoor activities after about 11am. I like doing outdoors stuff so for me it sucks but thems the breaks. Apart from ridic hot weather for a couple of months the rest of the year is actually very pleasant so swings and round abouts. Would be nice if we could get some decent rain though.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 09:23

Yes I detest the hot weather but like Homer & DG have said we learn to tolerate it as best we can.

Aircon too expensive to run. I cope better when a day is hot but the nights wreck me.

Hence my Summer countdown is on - my first sign of getting through summer (time wise) is the Solstice - only about a week away - tick (nearly) then it's Chrissy then it's New Year so that means only 2 months of Summer left by the time Christmas/New Year period is done smile

Obviously though although the heat usually ramps up in Jan/Feb but once it is January I only have 59 days of technical summer to go grin

Long termers here know what I'm like grin

I FEEL that we will have another fairly wet period or two in Jan and/or Feb - can't give reasons - just a gut feel.

Anyhow it is Summer and we will have heat - it's the way it is. smile
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 09:32

Great time to wash down the house. Get your hose and cleaning utensils together and start washing the windows, walls, gutters, deck etc.
You will inevitably get splashed and sprayed so it really is the perfect opportunity to get stuff done and keep cool and wet.

I know I'll be doing it. Just bought myself a Karcher pressure cleaner for my birthday. Can't wait.
Positive vibes people; it's Summer in Australia isn't it?
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 09:41

Originally Posted By: Long Road Home
Just a stock standard average spike for this time of year which the media will blow out of proportion just like they do with every storm day laugh


If you look at the latest runs of GFS, it's certainly going well beyond normality if that comes off. Starting to look like Feb last year, with 28C 850mb temps, and 36C @ 925 next Tuesday, so tomorrow's heat is just a taste of what's to come. 45C will be reached at Penrith on Tuesday at this stage.

This certainly doesn't resemble a La Nina, that's for sure.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 09:45

WR, any idea of the timing of the change on Tuesday/Wednesday and whether any of that heat will get to the coast?
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 09:51

The winds look really weird, they go southerly on Tuesday evening but then turn back to cooler westerly on Wednesday morning. Looks like the heat might make the coast at this stage too. But the winds and distribution of temps looks a bit strange so I wouldn't be surprised if the next runs showed something totally different.

Meanwhile EC has the heat inland and storms on the coast with NE winds, which seems less likely I think, given that hot and dry air aloft would spoil any storm chances .
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 10:28

If GFS is then to be believed, with the amount of cloud and instability it's progging for the next week not to mention also the strength of the subtropical jet, it would take a hell of a NW'er to drag a 45C from somewhere and I'm struggling to find a westerly strong enough on any of the available models.

Still a standard warm/storm event from what I can see, and perfectly normal for a La nina.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 12:32

It's heating up in Sydney's outer West, now up to 33-34. Meanwhile, at OH, the temperature has plunged (well, it's dropped a couple of degrees anyway) to 24 in that barrelling Easterly. I wouldn't be surprised if the 26.6 recorded at 10:26 is today's maximum there, apart from maybe a bonus addition before 9:00 tomorrow.

EDIT: Might get some mixing of hotter air lower down if it does actually get as hot as forecast in the West.

Pleasantly warm, breezy with clear skies here, probably about 28. Like a photocopy of the last couple of days.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 12:52

We've almost cracked 30 - definitely will very soon, tends to keep warming till about 6 or 6.30 out here this time of year.

As an aside - I've had a peek at sun rise & set times for here.

We've actually already gone past our earliest sun rise time (was last week) - each few days it is already getting slightly later.

However - sun set actually gets slightly later for the next week or two and stays at around 8.10 to 8.15 till well through January. Only at the very end of January does sunset come back to the time of say today (8.05).

Interesting how it works, after the Solstice the days end still gets later (a bit) but the sun rises later as well.
However the rise time gets later proportionately quicker than the sun sets later for a few weeks - if you get my drift. shocked

In years gone by I assumed that the earliest sun rise and latest sun set were on the solstice but that is an incorrect assumption. Only worked it out over the last several years - D'oh smile
Posted by: GringosRain

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 13:04

Interesting Dave. Didnt realise that either. Makes you wonder about the mechanics of that....

Just checked temp and was a bit surprised...36 already.

I really wouldnt mind if the dams were full and we had rain....but if this keeps up we are going to run out of water. Some smaller dams are almost dry. Spring down the road that I have never seen dry has stopped running (or at least the water has stopped flowing across the road).
Bring on 42 degree days and evaporation! yay.
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 13:45

Originally Posted By: Steve777
Might get some mixing of hotter air lower down if it does actually get as hot as forecast in the West.

I keep an eye on Terrey Hills for signs of that.

43.0 at Smithville is the best effort in NSW thus far. At these temps the mixing through the troposphere is pretty much done and the absolute highest temperature possible is usually reached by early afternoon.

Unless the hottest air is still to be advected into NSW I can't see it getting much higher.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 13:46

More than 15C separates Sydney Harbour and Penrith currently
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 13:50

It's really green out here now BUT it won't take long to knock that about with the hot run.

Will stop the lawn in it's tracks again.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 14:30

Originally Posted By: Jimi
More than 15C separates Sydney Harbour and Penrith currently
One of the main reasons I moved away from Penrith up to the central coast. Haven't even needed aircon this season yet. Where's in Penrith probably would've had it going a dozen times in Penrith so far.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 15:19

It's reach 38 degrees in Sydney's outer West, Penrith up to 38.6 so far (101.5 F). Even the Airport had passed 30. OH has 'surged' to 28 with a drop in the Easterly.

Re the Sydney Harbour site, that is actually on a navigational structure on a reef near the entrance to the Harbour, between Middle Head and Nielson Park, a few hundred metres off shore. It probably doesn't reflect anywhere much but is a useful early guide to sea breezes and Southerlies.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 15:34

Originally Posted By: Steve777
It's reach 38 degrees in Sydney's outer West, Penrith up to 38.6 so far (101.5 F). Even the Airport had passed 30. OH has 'surged' to 28 with a drop in the Easterly.

Re the Sydney Harbour site, that is actually on a navigational structure on a reef near the entrance to the Harbour, between Middle Head and Nielson Park, a few hundred metres off shore. It probably doesn't reflect anywhere much but is a useful early guide to sea breezes and Southerlies.


There you go. I always thought it was on Fort Denison for some reason
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 16:01

Penrith had a brief surge to just short of 40 at 3:30PM. This seems to have been associated with a brief swing of tyhe wind from N-NE to W.
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 16:08

Bit strange that even after days of NE'ers, the SST's off Syd have actually increased to a max spike of 22.45C at 9am yesterday (According to MHL). I suppose they'll start dropping eventually
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 16:26

Penrith tipped for 42 tommorow. With many western suburbs upgraded to 41 as well including campbelltown, parramatta, liverpool. Have a lot to do tommorow, really not looking forward to the heat.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 16:37

Oh I thought the Sydney harbour site was fort Denison also.
There you go. You really do learn something new everyday.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 17:47

I notice that a new AWS has popped up on the Sydney BoM radar (when weather observations is on), Marangaroo (Defence), just north of Lithgow.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 18:38

Is that rain off the coast of Sydney?
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 19:20

Fire Weather Warning
for the Greater Sydney Region and Illawarra/Shoalhaven fire areas.

Total fire ban tomorrow. 'Sydney Region' includes the Blue Mountains and the Central Coast.

Originally Posted By: Rainbow Spirit
Is that rain off the coast of Sydney?

It looks impressive but there's little cloud in the area. Although it also shows in the Newcastle and Wollongong radars, I don't think those 'showers' are real.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 21:47

My big high speed pedestal fan is at full speed trying to pull in cooler air from the eastern side of the house and expelling hot air out to the west side. Outside the temp's are down to around 25c, inside around 27.4c. The night time race is on to get the temp's down as low as possible before tomorrow's onslaught.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 22:40

I know I must be the last to realise this, but if you double click on a weather site on the radar map, up pops the weather observations for that site! I've spent years typing in the sites to get that info!
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 22:49

Originally Posted By: Wave Rider
I notice that a new AWS has popped up on the Sydney BoM radar (when weather observations is on), Marangaroo (Defence), just north of Lithgow.

Must be underground as the elevation is 0.0m.

Seems as though only military sites get new weather stations these days.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 13/12/2017 23:02

Originally Posted By: Steve777
Fire Weather Warning
for the Greater Sydney Region and Illawarra/Shoalhaven fire areas.

Total fire ban tomorrow. 'Sydney Region' includes the Blue Mountains and the Central Coast.

Originally Posted By: Rainbow Spirit
Is that rain off the coast of Sydney?

It looks impressive but there's little cloud in the area. Although it also shows in the Newcastle and Wollongong radars, I don't think those 'showers' are real.


I believe it’s actually the seabreeze that’s being picked up by the radar.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 05:50

Holy dooly, forecast for next Wed is now 43C in the Lower Hunter.
This is well and truly a heatwave, by whatever subjective definition one uses.
The thread title may need to be changed and extended.
Will be interesting to see if Penrith can beat it's current December record of 42.3C in 2009, which looks fairly weak by Penrith standards, esp when you have a 46.5C in Jan and a 46.9C in Feb. (and even a 44.9C in November 2014)
Records only started there though in Dec 1995. (there was actually a 44C day in December 1994 in most of western Sydney)
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 06:54

Originally Posted By: rain gauge
I'm sure many people out Penrith way aren't looking forward to this dreadful heat

I am certainly not. Dreadful dreadful week ahead.

Penrith is a really stupid place to live poke

Wollongongs forecast however, glorious!
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 07:52

Originally Posted By: DerekHV
Holy dooly, forecast for next Wed is now 43C in the Lower Hunter.
This is well and truly a heatwave, by whatever subjective definition one uses.
The thread title may need to be changed and extended.
Will be interesting to see if Penrith can beat it's current December record of 42.3C in 2009, which looks fairly weak by Penrith standards, esp when you have a 46.5C in Jan and a 46.9C in Feb. (and even a 44.9C in November 2014)
Records only started there though in Dec 1995. (there was actually a 44C day in December 1994 in most of western Sydney)


I remember 21/12/1994 well as we were living in Minchinbury at the time, mum had taken us down the St Marys pools and the water was about 32c, and it was packed to rafters as it was school holidays. laugh
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 09:30

30c here now. Looks like mother nature is preparing the ice bath for Observatory Hill as we speak.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 09:43

When is this westerly supposed to win out?
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 09:45

Clear skies, light winds, NW as far as I can make out, cicadas in full throat and about 28-29. It's now about 30 over most of Sydney. The sea breeze is up and running on the coast, in fact, apart from dropping around dawn, it's been blowing for 72 hours +.

There's a cloud band extending from about Eden across Canberra to Forbes, but that's several hours away.

I can't see OH getting past the low 30s, but I think Western Sydney will make or exceed the forecast 40-42.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 09:52

In my opinion I don't think it will win out, sea breeze looking very robust already and the wind at Mt Boyce isn't that strong. Unless the westerly grows a pair soon then it might be a struggle getting to 37c.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 10:16

A bit over 28 out here.

Wind near 30k from NW - strengthened from about 8 am.

We will continue to warm gradually all day until around 6.30 or so I suspect.

Tennis tonight will be rather sweaty!!
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 10:51

Westerly just kicked in here in Lane Cove!!
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 10:52

Its going to tough for many people in western Sydney. Especially those in fibro houses without aircon. In those houses when its 42C outside its 42C inside. No escape. I'm sure Nepean hospital is going to be very busy over the next week. Good luck to those out there.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:16

Solid easterly here and temp at 33°C. Albion Park 31°C with 21°C dew point so it's really humid and sticky out there. Not a beach day though with almost 20 knot NEer, yesterday was much nicer.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:24

Yet only 23 on the coast. Huge difference. That NE'er will keep major heat away unless it dies soonish.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:46

Westerly and the sea breeze really battling it out here.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:47

39.9 penrith at 11:40 am. Insane stuff
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:49

Just ticked over to 36 here. Light nor-westerly blowing.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:52

Hot with light winds (hard to tell direction) at Artarmon. I'd guess around 35. Penrith has already reached 40, Richmond is close and it's not even 11:00 Solar time. I see the BOM wound OH back to 35, it's peaked at 30.5 there so far.

Great beach and school holiday weather, maybe not so great for the guys doing the landscaping work in the grounds of our building.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 11:59

Is there any way of checking the biggest variances in maximums withing the Metro on any given day?

Sydney Harbour V Penrith - the seabreeze is currently worth 17C.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:09

That's a pretty thick seabreeze
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:23

Sea breeze has just failed here (Gwynneville) - temp rising quickly.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:24

Oh my days Bankstown AWS is already at 37.6 and there is only 11km/h nw winds so it's gonna be a tough walk home.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:26

40.6c in Penrith. How high will it go? My guess is 43c.
Posted by: GringosRain

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:27

Just hit 40 here, Doesnt feel too bad though, guessing due to low humidity. Not a cloud to be seen......
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:34

Still a sea breeze here, I doubt the NWer will break through. Looking at the escarpment to the south I can see haze in the lower parts but then there's no haze about halfway up so the NWer must be blowing about 300-400m above here.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:42

Just 30.1C here in Gorokan.

And 26C at Norah head.
The seabreeze here Id say is weak at the moment.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 12:53

41.9 for penrith already
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 13:12

Penrith is showing a small drop in temps! Cloud?
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 13:26

Temp here stable for a while around the 31 to 32 mark.

We tend to peak late each day - reckon we will see 34/35 by days end.

Still sunny out here
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 13:31

Re differences across Sydney, I'd use Bellambi or maybe Nobbys as a guide, given the absence of any Coastal station in Sydney itself. Norah Head too, although that is sometimes anomalously warm, I think owing to the large exposed rock shelf nearby.

'Sydney Harbour' is actually in the Harbour, so might not be a good indicator of the temperature where anyone lives or works.

Using Norah Head now, we have a range of 24.1 to 41.0, just under 17 degrees.

Another point is that "Sydney's" official maximum so far is about 31 and may not go higher, while most Sydneysiders will have experienced 38+.

EDIT - car thermometer report (Lane Cove - Lindfield): 36 - 37 around 12:30.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 13:46

There's no cloud at Penrith or near Sydney. There's a cloud band extending NW from about Batemans Bay over Yass to Peak Hill, and a blob of cloud near Jervis Bay. It should remain fairly clear in Sydney for a few hours.

No sign of any Southerly on the coast at this stage.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 13:46

Seabreeze back here and temp moderating around 27/28 from the 'feels'. 40 over the hills but looks like we may be spared that - patch of ACCA's in the mid levels says the change is starting to push it's way across in the uppers.
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 13:51

Sadly, the sea breeze looks to be winning over the eunuch westerly flow. Terrey Hills and Canterbury have succumbed in the last hour.

Just noticed a new site in Sydney; Holsworthy (Defence). Another southern Sydney site which confirms the BoM's agenda of ignoring just about the entire northern section of Sydney (Hills district to the North Shore).
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 14:17

Originally Posted By: kizz
Sadly, the sea breeze looks to be winning over the eunuch westerly flow. Terrey Hills and Canterbury have succumbed in the last hour.

Just noticed a new site in Sydney; Holsworthy (Defence). Another southern Sydney site which confirms the BoM's agenda of ignoring just about the entire northern section of Sydney (Hills district to the North Shore).


Yeh, surprisingly few AWS's in the north of Sydney. Castle Hill, Hornsby or Turramurra, as well as maybe Chatswood would be good places to start.
High of 38.4 here at the moment. A few small puffy clouds occasionally passing by but not affecting the temp.
Can't see any stormage today.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 14:23

Could the southerly later tonight trigger any stormage
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 14:27

Originally Posted By: Sidney
Could the southerly later tonight trigger any stormage


Yep, sure possible. It'll depend on timing, as usual.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 14:34

42.6c the top temp in Penrith so far so there goes the record for that particular AWS. Looking like my prediction of 43c is going to be pretty close to the mark.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 14:48

Originally Posted By: davidg
42.6c the top temp in Penrith so far so there goes the record for that particular AWS. Looking like my prediction of 43c is going to be pretty close to the mark.


43.4c @2:36pm the top temp so far according to BOM observations page. that wesaterly has picked up hence the spike in temps.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 15:01

I'd gladly take the sadness of the seabreeze winning out over this hot NWer, my vegie patch is wilting like you wouldn't believe under this relentless heat.

Last time I looked at my outside thermometer it was 42c in the shade, with a moderate NWer blowing. Come on the seabreeze.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 15:20

The sea breeze would probably make the conditions feel worse tbh. Slightly lower temps yes, but way higher humidity.

Here it's 'only' 31 but it feels a few degrees hotter with no wind and humidity.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 15:35

Anyone know the hottest temp recorded in the Sydney Basin in December? (including the old Richmond RAAF station, before it moved). Penrith will probably need another 0.5C at least, one would think, now at 43.2C.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 15:51

Geographically, what contributes to Penriths nightmarish climate?

I assume it's the horrible combination of being in a valley and sitting at the foot of the blue mountains. Any breeze from the west gets blocked, any breeze from the east can't penetrate and if it does it will skip over the top of the valley.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 16:07

I suspect your thoughts are pretty much it, my guess similar to yours. smile

So far we've topped out around 33 - we might sneak a little extra in although some scattered cloud around may keep a lid on the temp.

Too much cloud would make tonight horrid though.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 16:21

We might get a sneaky little storm or shower to cool us down soon!! Or if it's just very light, it might make things worse..

I can hear thunder as I speak.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 16:21

Raining Shellharbour
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 16:30

Not raining here but we're getting some nice cool SWly outflow after hours of no wind at all.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:20

Interesting tweet from weatherzone:

This is the fourth calendar month of 2017 in which Penrith has set a new maximum temperature record:
February 46.9C
July 28.2C
September 37.3C
December 43.4C (as of 3pm today)

There certainly have been some records broken this year to date.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:21

Should we extend this thread with another burst of heat, on the 19-20 as a hot airmass sitting over inland WA moves over into NSW.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:46

Was about to drive home from work.
Current temperature 42.3°C

cancels plans to drive.
Posted by: perrywinkle

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:46

Rumbles here at Warrawee.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:56


A few thoughs / observations

1. I say we extend the thread. Derek should be able to edit the end date.

2. That's an interesting set of facts about Penrith, even if it only has a bit over 20 years of records, four records in two Summers, a Winter and a Spring within one year really is quite something.

3. Penrith reached 43.5 today (110.3F). That's pretty hot, in fact the hottest in the state today, at least among sites available on line. The only places to reach 42 today were in the far NW of the state and Sydney's outer West (among on-line sites).

4. I don't know why the BOM thought it would reach 37 (or 35) at OH with such a weak Westerly component, even though it was a very hot air mass. They were probably correct for other locations about 7-8 km from the coast (e.g. the Airport, 8km, 36.1) but OH is right in the path of a sea breeze funnel.

5. Around 2:00PM the car thermometer showed 40 at Lane Cove West and 37 back at Artarmon, about 8km as the Crow flies NW of OH.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:57

Rumbles here as well in Dural (6 in total so far) from a rapidly expanding small cell just south of Castle Hill.
Mainly cc's I think.
I really thought today would be too dry for any storm development. The southerly boundary is hours away - somewhere between Merimbula and Narooma. It doesn't look particularly strong.
Anyway, I'll take it, although I think I might just miss it - the rainfall that is.
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 17:59

When the BoM forecast 20-30km/h NW'lys earlier on in the day I was pretty confident we'd hit 35C, was a bit surprised when the seabreeze won over, usually a W'ly of that strength is just enough for the whole basin to get the heat.

First storms going up to the west now, picking up later on.

Monday looks like a massive storm day for the Hunter-Basin-Illawarra region, extreme CAPE and instability progged.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 18:12

A couple of rumbles and a few spots of rain in Artarmon. It feels quite tropical now, hot, humid. There are some interesting cloudscapes to the North.

EDIT: The Southerly looks to have just passed through Montague Island, so it's a way off.

I think that tomorrow might be a bit warmer than forecast, with a 'hot' (or warm) SE'er. WE got a few days like that last Summer. On the other hand, we might be trapped under a marine layer and it's stuck on 21-22 all night and all day. We shall see.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 18:41

Some serious lightning and thunder hear now. Window rattling stuff.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 18:46

Bucketing down in Chatswood. There was a loud crack of thunder a few minutes ago and another just now, plus there are ongoing rumbles and rolls. The main cell is passing to the North. Not as active here as it looks on the radar.

EDIT: intensifying
Posted by: Crimson_Tide_

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 18:50

Thunder and CG lightning strikes here in Mt Colah, nothing to note in terms of Rainfall.
Posted by: LuvsaStorm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 18:57

You guys are driving me crazy. Have not had one storm in Sussex Inlet this season. You all know I only post when there's something to say. That's why you haven't heard diddly from me! Sussex storm shield in full force. Nowra got to 40 today. Yawn.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:04

This is awesome. 😁😁😁
Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:24

Just heard a loud boom in Erskineville from that cell. About to head home, wouldn't mind some H2O when I get home before this extended run of heat kicks in and dries everything out.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:25

Originally Posted By: CoastalStorm22
This is awesome. 😁😁😁


What are you getting?
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:32

Just some rumbles here as the storm was to the south. Great to hear on a hot summers day though.
Quick development to the WNW atm so maybe another round to come.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:36

Chatswood picked up 8mm in about a hour from that cell. Our building's contract gardeners planted a new tree today (Council requirement to replace one we had to take down), so that bit of rain will give it a nice boost after today's heat.

The rain and lightning seems to have stopped now. Looking forward to more warmth and storms.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:40

Originally Posted By: Homer
Originally Posted By: CoastalStorm22
This is awesome. 😁😁😁


What are you getting?


Heavy rain and lashing wind, great way to end a hot day. Chuffed. grin

8mm on the VP2!
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:44

It thrashed down here for about 20 minutes. It started when we were down at Balmoral having a swim and kept going after we got home - I was surprised at how long it lasted (we were lucky to be in the widest part of the band). A few north-facing windows were left cracked open and we now have wet carpet.

On another topic there have been about 5 changes to the Sydney forecast for today during today. A few out of cycle ones this morning/afternoon and another one after 6pm tonight.

At least they're paying attention
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:48

Excellent!!

I had plenty of rumbles here, no wind, and lucky to have been half a mm of rain. Still, was good to see some storms about.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:48

Originally Posted By: Morham
Was about to drive home from work.
Current temperature 42.3°C

cancels plans to drive.


Why wouldn't you drive?
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:51

I don't think Derek can extend the date Steve. I'll PM Seabreeze.

Edit: I suggested to add thunderstorms to the title.

And I encountered a storm in Robbo this arvo (as I was filling up!)
Posted by: mkeene(pingtang)

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 19:58

The Illawarra got spared today, however Nowra was pretty hot at 40.4c Those high based thundery showers around Albion Park/ Jambaroo would have been nice to take the edge off the heat. No such luck in Nowra, just some teasing distant rumbles to the north,and a few bolts sighted on the escarpment. And to make matters worse a blanket of mid high cloud to keep temperatures well in the high 20's/ 30c, until the weakish southerly arrives around 10pm or so.

The Moruya area also fired briefly on that southerly convergence boundary. That area is a hot spot for storms, it gets far more a year compared to Nowra. That same southerly may spark a few more flashes offshore, but i'm not overly hopeful.
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 20:11

Some crazy CG's off the coast atm and pretty frequent. There is a cell to the west as well going by the visual and radar. Looks like it might come straight over the top of here.
Bring it on!
Posted by: Quagmelson

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 20:14

Very high based storm just ripped through here. Heavy rain and a freaky wind gust to accompany the heaviest part. Lots of cc activity but a few surprising strong cgs out of the clear southern flank
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 20:33

That cool change better come soon. Last night was almost sleepless due to the heat. Its time that i purchase an aircon for my room.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 20:36

Looks like it may arrive at only 1:00 am, according to the forecast.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 21:24

Looks like the heat for Tuesday and Wednesday is locked in and going ahead now. GFS is still hell bent on 30 degrees at 850mb and 36-37 at 925mb. Atm it looks like southern and western areas will bear the brunt with the warmest part of the airmass passing over Sydney and surrounds on Tuesday night. Canberra could get close to 40°C even with the predicted cloud cover but at this stage I'd predict 37°C.

Could be one of those weird situations where the day has a seabreeze and temps in the 20's then night time comes and temps rise to 35 or something.
Posted by: GringosRain

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 22:02

GFS pumping up the chances of some severe storms over the Hunter tomorrow. Pretty decent LI and CAPE and enough shear to move them through....
lots of heat. Could be interesting. Thoughts?
Posted by: Stormy3

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 22:08

Same as usual,GringosRain,we will have to wait and see Ha.Just had a few big drops now,lightning to SE out to sea, and moving further out to sea,
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 22:21

It's a hot, humid, still, partly cloudy night with a light show in the East.

The Southerly seems to be stuck between Ulladua and Point Perpetualar.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 22:35

Our farourite Sydney Harbour station is well above where it was at any point during the day today.
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 23:10

That thunderstorm at around 8pm that went over here was let some serious CG's out.
Had one flang but not to much rain.

Photos are looking to the west of here.







Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 23:21

Marts - Since Photobucket started seeking exorbitant prices for what I had assumed to be a continuation of their previously free crappy, slow and practically unusable picture hosting site, I've been using PostImage: https://postimages.org. You could also try Flickr.

P.S. Chatswood seems to have done best from this evening's showers and storms, finishing with 11mm.
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 14/12/2017 23:28

Ok thankyou Steve, appreciate it. Will try it.
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 00:02

As from my other post just a few photos from this arvo's thunderstorm.
My settings weren't quite right but still happy.
Missed the one that I think hit the roof though. Jeez it was a good flang!

Photos are looking to the west.





Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 06:10

Nice pics Marts.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 06:11

Going for 46C in places like Wilcannia and Ivanhoe next Tuesday.
Will be interesting how much of this heat can track east by Tues- Wed next week.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 11:58

Greetings from the Western Sydney desert, once again what little rain there has been around Sydney completely bypassed our desert area.

Yesterday my bare feet were burning on exposed soil out in the garden, then I stepped onto a steel grid laying on the ground and yowie, that was hot!
Posted by: dknever

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 12:06

Tomorrow looks to be another scorcher as well.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 17:37

Great lightning pictures Marts. Thanks for posting.

======

The radar shows showers are moving across Western Sydney, having previously crossed the Central Tablelands. No totals seem to be registering, however, apart from falls of 1 mm or less in the Central Tablelands. Virga?

======

Warm, muggy and overcast here, with a few sunny breaks and no rain. Early brisk Southerlies dropped Right off in the afternoon. It touched 30 at Richmond, reached 25-27 in most suburbs in spite of the cloud.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 15/12/2017 17:57

We got some light rain here about an hour ago, 0.75mm tops, a few spots coming down now, looking like some good rain coming, but it will slide away to our south.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 06:31

It's a warm, overcast morning. There have been some light showers overnight with storm cells passing North of the Hawkesbury to the Central Coast. Totals reported are only about a mm or so.

There's a clearing edge across the West and South of the Metro area. The cloud's streaming from the NW parallel to the edge but Ithink it will gradually shift Eastwards, clearing Sydney this morning.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 07:43

Now looking at 41-42C next Tues-Wed, in western Sydney and Hunter, even 43C in Tocal. (Dec record there 44.2C in 1990 -which was a very hot December historically, as was the whole summer of 90-91)
Penrith may get another crack at it's December record, and even overall Sydney record. (from what I can see the highest temp in the Sydney Basin in December is 43.9C in Parramatta on December 21st, 1994, although I stand to be corrected there).
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 11:19

Does anyone know when that la nina will start producing below average temperatures and greater rainfall?
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 11:25

Originally Posted By: Morham
Does anyone know when that la nina will start producing below average temperatures and greater rainfall?
My guess would be probably when this heat wave breaks up. Maybe around xmas new year. Then again I'm no expert ,just an opinion going by previous stagnant heatwaves
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 11:28

Heat's needed to form Hadley Cell to drag down the Monsoon. Once Hadley Cell establishes then rain will follow. Don't forget December isn't usually a reliable rainfall month for most on the east coast; Jan - Mar are usually much wetter.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 12:25

I note in passing that the belt of high pressure is relatively further North than expected. We have a strong stagnat high in the Tasman and another in the Indian Ocean but only a weak ridge across the Bight. If it shifts South, as it will do, Easterlies will dominate here, especially if it stagnates, with the longed for / dreaded cloud, rain and cool temps.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 12:58

Originally Posted By: rain gauge
Originally Posted By: Morham
Does anyone know when that la nina will start producing below average temperatures and greater rainfall?
My guess would be probably when this heat wave breaks up. Maybe around xmas new year. Then again I'm no expert ,just an opinion going by previous stagnant heatwaves

Sounds good to me.

This heat wave does feel very rare even for Penrith. Decembers usually feel quite rainy. The heat really starts to kick in during mid january to feb.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 13:14

When I lived in Penrith I noticed on many occasions the extreme heat always seemed to occur around mid January. Tho it occurs at all different times, mid Jan always seemed to have a heatwave around it.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 14:43

Originally Posted By: rain gauge
When I lived in Penrith I noticed on many occasions the extreme heat always seemed to occur around mid January. Tho it occurs at all different times, mid Jan always seemed to have a heatwave around it.


Yep mid Jan is where we get our 45c+ days. Then Feb is where the humidity kicks in and the temps go down a bit.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 14:49

Yeah exactly. I think feb is worse. Give me dry heat anyday
Posted by: Stormy3

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 14:57

Looking north from here there is a line of huge towers from west to east,looking at the radar they are up around Gloucester Dungog areas moving east.
Posted by: chapo

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 16:19

Roll cloud associated with the Southerly clearly visible on the sat pic

Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 16:43

Glorious day here smile prefect summers day
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 16:44

Wow nice catch, That looks amazing on satellite would look even better in real life i bet.


BoM has upped the max for tues and wednsday, 43c both days for Penrith. Not looking forward to this heatwave.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 17:10

Great catch Chapo. If I were near a beach I'd be watching for it. It looks to be just off Jervis Bay now (from Weatherzone 'Layers'):



WE can also see some storm cells near Moruya. Maybe we'll get some here later.
Posted by: Stormy3

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 18:40

I just got a heavy brief downpour here,it was close to hail,the cell developed nearly above me and was only here in Ellalong.moved to my east, two claps of thunder.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 19:52

Two 43 degree days are forecast for Penrith on Tuesday and Wednesday.

Actually, the weather pattern we have now reminds me a bit of January through mid February this year. A stagnant setup with a Tasman high, a very hot air mass, weak Southerly changes interrupting a generally weak N-NW flow that mostly doesn't reach the coast. It's not as hot because it's early in the season.

The heat early this year ended in a 'Monsoon' from late February into early April. Maybe it'll be the same this time around. There are signs in the models that the current pattern will end around Christmas.

EDIT: Looks like the Southerly passed through Bellambi a bit after 7:00PM. It doesn't have a lot of puff and, on the coast, it hasn't much affected temperatures.
Posted by: Nick Sykes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 21:58

Tuesday looks very hot here in Canberra.

GFS has been consistently forecasting 850 temps between 28 and 30C for 6Z on Tuesday. This would translate to about 40-42C in Canberra which would be a new record for highest recorded December maximum. BOM forecasting 38C at this stage.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 22:53

Small cell headed towards the far south-western parts of sydney. Would probably die as soon as it exits the mountains though. Would be great to be treated with a late night light show though.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 16/12/2017 23:03

It was 40°c here today. Friends two chickens died. Silly things insisted on staying in a colorbond shed even though they could easily walk out of it.


Another horrific summer day here. And two 43 degree celcius days coming up.

Steve777 it is similar to that record breaking jan and feb this year. I still find it odd, penrith is so close to coast (from a satellite perspective) but is so susceptible to high pressure systems originating in the desert.

By my count that is 13 days at or over 40 deg celcius this year. Will possibly be 16 days by the end of next week.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 06:41

Woke to thunder just now. There have been a couple of loud cracks.

There's nothing to see, it's fairly bright and low cloud obstructs any view of structure. It just looks like your standard post-Southerly day.

The radar shows a narrow line of cells quickly moving over Sydney from the West.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 06:45

That just woke me to Steve. grin
Posted by: Crimson_Tide_

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 07:00

Nice to wake up to the Thunder, some CC lightning and the sweet smell of Rain.
Looks to be another Cell building up over the Blue Mountains.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 07:03

All quiet now (no, another loud rumble as I type). There was a few minutes of light rain, then a couple of sunny breaks. It's darker now that the cell has moved East.

There are other cells about, near Kiama, Katoomba, Picton and to the South and South West.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 08:51

Plenty of thunder here as well, sadly totally jumped us frown
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 10:01

I usually like storms but not when they wake me twice in one morning frown.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 10:47

BoM's latest update for Sydney. 20% chance of showers/storms for the rest of sunday. Guess theres only a 20% chance of that blob west of Katoomba would make it to the basin grin
Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 14:00

Looking at the models seems today could have some decent ingredients (decent LI and cape) for some decent storage.

Except for what appears to be a decent cap and the stabilising nature of the SE winds which seem to be the biggest hurdles. I note Penrith has nudged 32.1 degrees and 27.1 degrees at Bankstown so maybe it may be enough for something to fire?
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 14:57

Some big cells are developing over the Tablelands and moving Eastwards, including one near Lithgow and another big one near Shooters Hill. It's hot, humid and sunny in Sydney's West, having almost reached 33 in Penrith, in spite of Sydney's East being covered in low cloud. At least Sydney's West should be getting some action later.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 15:07

Unless something pops up out the back of Bowral say, I doubt any part of Sydney will get anything today to speak of. Of cause one can always have some hope.
Posted by: isaY

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 15:10

Yeah there is a cell heading our way from the north west. A few rumbles around but it may well pass just to the north
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 16:56

Looks like "Interesting" weather for the pre-Christmas week for Sydney and nearby areas:

Monday: hot inland but mild on the coast. The BOM has overcooked Sydney (OH) again. There's no off-shore component, it will struggle to reach 27 there, let alone 30. Given that Penrith reached 33 today (rounded), 38 there tomorrow should be a doddle.

Tuesday: record territory, with 850 temps in the afternoon up to 28 over Sydney with not much cloud. OH might have been undercooked - the hot winds might reach the coast. It will definitey be very hot inland (Penrith forecast 43).

Wednesday. Starts out like Tuesday. How hot it gets depends upon the timing of the change, which currently looks like early-mid afternoon. Maybe storms with the change. (Penrith forecast 42)

Thursday. Much cooler (low 20s max), cloudy, showers.

Friday: Mild, clearing

Saturday: Warm to hot, sea breezy near the coast (overcooked OH again)

Sunday (Xmas Eve) a final blast of heat before a significant cool change (need to extend thread?)

Xmas Day: the sort of weather the person cooking Christmas Lunch wants.

After that, it looks unsettled, with rain, some heat, some storms. We shall see.



Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 17:43

That unsettled weather with rain sounds good Steve777.

At the time of my last post it was mostly sunny and I hadn't anticipated the low cloud to roll in and ruin any storm chances today. Starting to break up a little now.

Rain would be great so far Bankstown AWS has received 635.6mm year to date vs average to December of 883.4mm. Can't see this changing drastically by the end of the year but you never know.
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 19:51

Bourke maxed at 44.6 today leading the charge with some proper heat in western NSW. Signs of things to come this week.

Looks like a lot of Christmas plans will be ruined if current models hold. My neighbour has just renovated his pool and installed a spa for his Xmas so he'll be gutted. My family's Xmas revolves around the kids and the pool so we're not too impressed either.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 17/12/2017 20:57

Originally Posted By: kizz
Bourke maxed at 44.6 today leading the charge with some proper heat in western NSW. Signs of things to come this week.



Spiffing stuff. Can't wait!!!
Not.
Posted by: Max744

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 08:21

Morning all, a really good MCS through here at Cooks Gap last night. It rained, thundered and lightninged from around 7pm until after midninght. Made it nice and cool for sleeping smile
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 09:28

Originally Posted By: Max744
Morning all, a really good MCS through here at Cooks Gap last night. It rained, thundered and lightninged from around 7pm until after midninght. Made it nice and cool for sleeping smile


Make you want to weep really, all that rain, and not a drop here.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 09:33

Zipped down to Rooty Hill yesterday to see family, I came through Lithgow immediately after a really big storm - we caught the tail end around Marrangaroo, hundreds of cars were parked - the road was a river and even with really good tyre tread it was aquaplaning central at low speed.

We crawled along at about 60k until just after the Wang turnoff then we gradually sped up. Wipers flat chat but struggling to give meaningful vision.

Possibly the heaviest rain and worst water on the road from a storm that I have been in for many a year. It was a struggle to make forward progress unless going VERY slowly.

A lot of lightning. Showers then till we hit Yetholme.

Dry at home of course
Posted by: Max744

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 10:13

Originally Posted By: DaveM
Zipped down to Rooty Hill yesterday to see family, I came through Lithgow immediately after a really big storm - we caught the tail end around Marrangaroo, hundreds of cars were parked - the road was a river and even with really good tyre tread it was aquaplaning central at low speed.

We crawled along at about 60k until just after the Wang turnoff then we gradually sped up. Wipers flat chat but struggling to give meaningful vision.

Possibly the heaviest rain and worst water on the road from a storm that I have been in for many a year. It was a struggle to make forward progress unless going VERY slowly.

A lot of lightning. Showers then till we hit Yetholme.

Dry at home of course



But of course mate. Murphys Law poke
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 10:32

GFS looks good, but BOM are still saying only 30% chance of a storm here… The day has started off warm and humid, and I even have a light westerly here instead of the usual sea breeze, so not sure what is missing to only warrant only a 30% chance.
Posted by: ozthunder

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 10:40

Originally Posted By: Max744
Morning all, a really good MCS through here at Cooks Gap last night. It rained, thundered and lightninged from around 7pm until after midninght. Made it nice and cool for sleeping smile


I am glad somebody else has dared to used the MCS tag, as that was my thoughts exactly.

I chased the Oberon / Lithgow area yesterday (started at Goulburn but bailed) and the Great Western Highway was bedlam. Flash flooding and hail to 2-3cm.
Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 10:44

Agree CoastalStorm.

The BoM 9:29 am update has reduced the grading to 40% for the west. Seems to have reduced from the 50% earlier this morning.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 10:56

Its odd how they took the effort to update the forecast just to change the probability by 10%.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 11:39

Yes Oz - Marrangaroo (Lithgow) was awash and driving was very difficult when we went through. I almost stopped as well.

Thankfully we missed the hail falling. Water depth on the highway was crazy - aquaplaning at quite low speeds.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 11:41

Tocal going for 42C on Tues and 44C on Wed, the pick in the Hunter.
Tocal has 50 years of records, so will be interesting to see if it can challenge an already fierce record from December 1990 of 44.2C.
Would be ironic after the 47.0C record set in February as well, which thumped the Feb 2004 record.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 12:05

Some storms already popping up in the basin and moving quite quickly which all bodes well for later on.
Posted by: ozthunder

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 12:08

Originally Posted By: DaveM
Yes Oz - Marrangaroo (Lithgow) was awash and driving was very difficult when we went through. I almost stopped as well.

Thankfully we missed the hail falling. Water depth on the highway was crazy - aquaplaning at quite low speeds.


I had hail between Sodwalls and Rydal, and again at Portland. The hail had an interlude when I was on Great Western Hwy, but was still and absolute white out with rain.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 12:17

Still going for 43c here tomorrow. Wednesday has been "downgraded" by the BOM to a much more comfortable 42c.

I wouldn't be surprised if we ended up 1c warmer than that as the max temp forecasts are regularly under cooked on hot days out this way.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 12:23

I would go about 44-45C for tomorrow in Penrith given that less cloud is now predicted on GFS.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 12:42

Originally Posted By: Wave Rider
I would go about 44-45C for tomorrow in Penrith given that less cloud is now predicted on GFS.


>43.9C, ie 44.0C or above, would be a record in the Sydney Basin for December. (going on what records I can see).
Will be interesting to see if it gets there.
Locally we are going for 41-42C tomorrow. (heat will peak the next day)
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 12:51

Looks like this summer heatwave and thread title can definitely be extended to Xmas Eve now.
Western Sydney and the Hunter going for 40C+ again by then.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 13:01

Hey OZ T - yes white out indeed and then coping with splashes (walls of water) from passing vehicles even with them going quite slowly.

We must have been not far away from you in time/distance at some point smile
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 13:24

Smithville up to 45.4 just before 1PM. Not much cloud out there so should go higher.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 14:06

A small thunderhead has appeared at Oakdale, will it make it to us?
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 14:32

The cells are really struggling to get properly going, must be some strong capping.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 14:34

Nothing very interesting out here yet.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 14:44

Some rumbles over the escarpment here. Nothing massive or major as yet.
Posted by: ozthunder

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 15:59

Originally Posted By: Max744
Morning all, a really good MCS through here at Cooks Gap last night. It rained, thundered and lightninged from around 7pm until after midninght. Made it nice and cool for sleeping smile


Have a theory on why the area had a MCS. It required SE winds and a pool of unrealised CAPE over the southern tablelands.

The CAPPING over southern tablelands above around 700mb was just too strong for storms there. The surface CAPE was actually juicy and was advected by surface winds (from SE) into Central Tablelands where the Capping was weaker, so wave after wave of storms just fired off the central Tablelands and slopes and drifted north.

The whole setup would not have worked with NE winds, or if the Southern Tablelands CAP broke.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:07

There's a severe thunderstorm warning covering the Eastern part of the Central Tabkelands, the Illawarra apart from a coastal strip, Sydney's outer West and parts of the Hunter: for HEAVY RAINFALL, DAMAGING WINDS and LARGE HAILSTONES.

Storms have crossed into the Sydney basin South of Penrith.

------

Much cooler than expected. The cloud has stuck around all day with some sunny breaks. After getting near 28 mid morning, OH dropped back to 25 and has stayed there all day. Penrith reached 36.
Posted by: Northwesterly

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:10

Quite a bit of thunder here in Stanhope Gardens from the Penrith cell. It is moving east - northeast so may have a chance of getting it here.
Posted by: Northwesterly

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:21

Again skirted around us, light to moderate rain and a bit of thunder.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:22

Well that was all show and no go, lots of rumbles and a few strikes, about 0.5mm of 'rain' and it was gone as fast as it came.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:34

Can hear faint rumbles now. They seem to be nearby, but the nearest cell on the radar is now approaching Parramatta.

The Western sky looks dark, although there's no structure visible. After some sun just now, it's overcast overhead.

EDIT: The BOM have are now forecastin 44 and 42 for Penrith, with 31 and 38 for OH. The 44 would be a new December record for Penrith and possibly the Sydney Basin (if > 39).

Seems to be a cell trying to develop nearby, with louder rumbles.
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:40

Smithville - 46.8 not long ago. Very impressive.
Tibooburra the runner up thus far on 45.9.

44 the forecast in Sydney's west tomorrow.
Some call that forecast brave as it will be a record if it comes off. So the computer models must have intestinal fortitude.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 16:51

Noisy little storm moving through Chatswood now. grin
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 17:01

That storm seemed to pass just to by North. Lots of rumbles, but just a couple of minutes of light rain, probably not enough to register.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 17:11

I reckon about 3-5mm in that lot here in Chatswood.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 17:24

Same here Steve.
There have been constant rumbles here for about 90 minutes - some loud, some not so, but yes, almost constant.
Missed most of the rain, though it's a bit heavier now. Temp has dropped to 26.4 but it's very muggy.
Posted by: Northwesterly

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 17:31

The second storm was much better, it had visable structure, and the red on the radar image passed right over us. We had about three burst of heavy rain, no hail. 4.5mm in the gauge. Lightning and thunder was not very close.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 18:34

Originally Posted By: kizz

44 the forecast in Sydney's west tomorrow.
Some call that forecast brave as it will be a record if it comes off. So the computer models must have intestinal fortitude.


Bit of a shame that the sea breeze will be so aggressive on the coast, and in fact it may even reach Penrith but that shouldn't hinder high temps too much.
Posted by: Max744

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 20:11

Originally Posted By: ozthunder
Originally Posted By: Max744
Morning all, a really good MCS through here at Cooks Gap last night. It rained, thundered and lightninged from around 7pm until after midninght. Made it nice and cool for sleeping smile


Have a theory on why the area had a MCS. It required SE winds and a pool of unrealised CAPE over the southern tablelands.

The CAPPING over southern tablelands above around 700mb was just too strong for storms there. The surface CAPE was actually juicy and was advected by surface winds (from SE) into Central Tablelands where the Capping was weaker, so wave after wave of storms just fired off the central Tablelands and slopes and drifted north.

The whole setup would not have worked with NE winds, or if the Southern Tablelands CAP broke.


Hi Michael, yes, where I am at Cooks Gap is about 700m elevation and the Sth Easterly here at the time was very strong.
Posted by: Stormy3

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 20:30

Huge booms here of thunder,but not much rain yet,they are all noise and no action,so far.they have been thundering around the place all afternoon.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 20:31

Originally Posted By: kizz
Smithville - 46.8 not long ago. Very impressive.
Tibooburra the runner up thus far on 45.9.

44 the forecast in Sydney's west tomorrow.
Some call that forecast brave as it will be a record if it comes off. So the computer models must have intestinal fortitude.


I must admit I have never heard of Smithville before.
Then again, never heard of Delta AWS (near Wanaaring) that broke the state's September record this year either.
If it is an official weather station, then close to a December record.
I don't think the Bourke PO December record of 48.9C in 1888 is all that reliable.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 20:56

Smithville is a homestead in far West NSW, so far West it's almost in SA, some 210km N of Broken Hill.

-----

Storms seem to have shifted to the Hunter and further North for tonight.
Posted by: Stormy3

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 21:29

Yes booming thunder for hours now manly to the west of me there are storms in a long line just west of me moving NE,no measurable rain here yet.
Posted by: Max744

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 18/12/2017 22:43

Well, thereya go! Just out of the blue we're having a storm here at Cooks Gap smile
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 05:38

Originally Posted By: Steve777
Smithville is a homestead in far West NSW, so far West it's almost in SA, some 210km N of Broken Hill.

-----

Storms seem to have shifted to the Hunter and further North for tonight.


Thanks for that.
Sounds a bit like Mardie in WA, which is just a sheep and cattle station in the Pilbara, but holds the state record in Feb 1998. (and the 2nd hottest temp ever recorded in Australia)
Yeah, heard a couple of distant thunder noises last night, but nothing in it here.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 07:15

Smithville, 31.07 deg S, 141.00 E. This would specificy the location within a radius of about 900m.

The co-ordinates put it literally on the SA border. I think it is likely to be somewhere in that homestead just on the NSW side.



Re today's forecast: BOM still going for mostly sunny and 31 for OH. The 31 is more realistic than earlier forecasts but maybe still overcooked. It's also still going for 44 for Penrith. At this stage looks very much like a rerun of yesterday, with a very weak Westerly and a lot of cloud moving in from the South.

Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 09:02

046142
SMITHVILLE AWS
-30.0664 141.0017
Elevation 94.0
WMO code 94796

Some toasty minimums out that way this morning. Tibooburra the warmest on 33.5. A lot of other places stayed above 30 overnight. Not sure if any of these places will have that stolen by the 9am (8am) reset thief. It is a bit more of an issue there given the more westerly location.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 09:16

Temp dropped back to 23.2C with a passing shower at work in Singo. Maitland up to 27.7C, not often it is higher than Singo.
Once this burns off, the run towards 40C+ will be on though.
Posted by: J Pabo

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 09:31

Originally Posted By: Stormy3
Yes booming thunder for hours now manly to the west of me there are storms in a long line just west of me moving NE,no measurable rain here yet.


Yes, it went straight in-between you and I.

We did get a decent shower dropping 6mm, so I am not complaining. Better then nothing.

A lightning strike must have landed in the neighbours paddock, as the fire brigade was there when I drove past on my way form home. The missus said it was close, as the dogs were going off their heads before the crack. They must have sensed it.

This morning, the storm went alongside the west of us. As always, nothing that lands on us. It either stays on the southern side of the Hunter River through Singleton/Whittingham, east of us over Belford/Branxton, west of us over Singleton Heights/Bridgeman, or north side via Glendonbrook/Elderslie. But we cop all the lightning strikes! I think someone above doesn't like us.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 10:26

Originally Posted By: kizz
046142
SMITHVILLE AWS
-30.0664 141.0017
Elevation 94.0
WMO code 94796

Some toasty minimums out that way this morning. Tibooburra the warmest on 33.5. A lot of other places stayed above 30 overnight. Not sure if any of these places will have that stolen by the 9am (8am) reset thief. It is a bit more of an issue there given the more westerly location.


Those minimums should be safe if the temps were above that level at 9am yesterday
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 10:44

It's a very warm and humid morning after a pretty warm night. Minima weren't that high last night - around 21-22 - but the building is heating up. The cloud is breaking up and heading North. It's sunny and humid with light winds (N-NW'er as far as I can make out). It feels much warmer than it is (probably around 29-30).

The sea breeze is up and running on the coast after a period of light winds all over the compass. It will reach OH and here soon if things follow the usual pattern. Penrith and Richmond are up to 32, Mt Boyce 27 (34-35 at sea level) with a Westerly picking up there.

BOM still going for OH 31, Penrith 44.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 11:08

Richmond already at 35.3C with a relative humidity of 45%. Feels like 39.5C, Thats what i call tropical.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 11:20

32.5c and rising with a NW wind, odd thing is the dew point still 20+ even with the NW wind, sea breeze imminent i reckon.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 11:24

Not sure why the airport has a southerly. It’s cooler than Obs Hill too
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 11:32

It's got warmer since I was last outside about an hour ago.

The Easterly has reached OH and it's already dropped by nearly 2 degrees there. The 29.6 at 10:30 might be the maximum. If it follows the pattern of the last few days it will hover around 26-28 fir the rest of the day, although with a stronger Westerly there's a bigger chance of some mixing downwards of hot air.

Meanwhile, the NW'er has got going at Richmond, 15-18 knots, pushing the temp to 37.4, 3.5 warmer than Penrith.

EDIT: that Southerly at the Airport might be a bay breeze.
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 12:05

Originally Posted By: Steve777
The Easterly has reached OH and it's already dropped by nearly 2 degrees there. The 29.6 at 10:30 might be the maximum. If it follows the pattern of the last few days it will hover around 26-28 fir the rest of the day, although with a stronger Westerly there's a bigger chance of some mixing downwards of hot air.

Past experience has told me that the mixing won't be enough to affect OH despite those strong NW winds in the far west now.

I suppose it is another day for OH to compete with Bellambi and West Channel Beacon in their own separate Special Olympics for heat.

Multiple centres in the upper and lower west of the state already in the low forties at half eleven. Cloud will be the only spoiler ahead of the front.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 12:15

Sea breeze is here to wreck the day now. Humidity reaching disgusting levels.
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 12:42

Penrith going to break through the 40c barrier in the next 20mins or so. Still pretty humid, 39/18 at the moment.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 13:31

Richmond the first to crack the 40, 40.4C now.
Locally now 36-37C, and rising.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:08

29/23 on the Coast and it's pretty sticky. Pity no real chance of a huge storm this arvo.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:22

43C at Penrith now, it probably won't take long for it to reach 45C. I don't think it can go any higher than that, though.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:22

42.8 at Penrith
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:33

Originally Posted By: Sidney
42.8 at Penrith


Actually 43.1c is the highest thus far @2:13pm

http://www.bom.gov.au/nsw/observations/sydney.shtml

Should top 44c no problem
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:38

Obs Hill, Richmond and Penrith have all achieved their forecast maximums (rounded). Well done BOM
Posted by: davidg

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:41

Originally Posted By: davidg
Originally Posted By: Sidney
42.8 at Penrith


Actually 43.1c is the highest thus far @2:13pm

http://www.bom.gov.au/nsw/observations/sydney.shtml

Should top 44c no problem


Make that 43.8c @2:26pm so a new record for the second time in 5 days. 45c here we come!
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:43

Originally Posted By: Jimi
Obs Hill, Richmond and Penrith have all achieved their forecast maximums (rounded). Well done BOM


Probably so for Obs Hill but Richmond and especially Penrith could go higher.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 14:49

Bring on 50°C! You can do it Penrith! Make NSW proud!
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 15:02

Originally Posted By: Wave Rider
Originally Posted By: Jimi
Obs Hill, Richmond and Penrith have all achieved their forecast maximums (rounded). Well done BOM


Probably so for Obs Hill but Richmond and especially Penrith could go higher.


True but 44C - a record - was already a ballsy forecast. The scepticism was that we would fall short. No one would blame the BOM for undershooting Penrith if they’re going for 44C as it is.
Posted by: yep

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 15:11

What place recorded the 43.9c temperature which has been mentioned as Greater Sydney's December record?
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 15:16

44.1C
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 15:35

Originally Posted By: yep
What place recorded the 43.9c temperature which has been mentioned as Greater Sydney's December record?


It was Parramatta in 1994, but looks like it's just been beaten.
Penrith was not operating then, did not become a weather station until 1995. Richmond got to 43.7 that day. The old Richmond stations December record was 43.6C.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 15:53

Tibooburra looks like the highest so far in the state with a 45.1.
Pretty grand effort by Penrith though, breaking another all time monthly record for the Sydney basin.
Is this the third monthly record this year?
Amazing stuff if true.
I think I'll build a house at Thredbo Top Station and move there. grin
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:00

I'd have my house built on top of mount kosciuszko. Though i'd have to get it rebuilt everytime a winter cold front comes through.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:09

Originally Posted By: Homer
Is this the third monthly record this year?
Amazing stuff if true


The Fourth (or fifth) monthly record broken in 2017 actually:

For Penrith, February 11 (46.9); July 30 (28.2); September 23 (37.3); December 14 (43.5) and 19 (44.1). Still impressive, even if only 22 years of record. The December record might still be 'soft'. The November record is 44.9 (23rd, 2014).
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:29

Originally Posted By: Steve777
Originally Posted By: Homer
Is this the third monthly record this year?
Amazing stuff if true


The Fourth (or fifth) monthly record broken in 2017 actually:

For Penrith, February 11 (46.9); July 30 (28.2); September 23 (37.3); December 14 (43.5) and 19 (44.1). Still impressive, even if only 22 years of record. The December record might still be 'soft'. The November record is 44.9 (23rd, 2014).


Thanks for that Steve. I was thinking the whole metro area (Sydney basin) for the 3 x monthly records. This includes I think stations with longer records than Penrith. It's just something I thought I read here the other day somewhere.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:32

Originally Posted By: Sidney
I'd have my house built on top of mount kosciuszko. Though i'd have to get it rebuilt everytime a winter cold front comes through.


Quite possibly.
Do you mind if I build an upper floor on your house on top of Mt K instead? That would be even better. smile
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:40

Not much trouble to get a breeze through the house if you have it on Mt K smile

Not an easy place to get a lawn going either. Less mowing I suppose smile
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:42

Originally Posted By: Homer
Originally Posted By: Sidney
I'd have my house built on top of mount kosciuszko. Though i'd have to get it rebuilt everytime a winter cold front comes through.


Quite possibly.
Do you mind if I build an upper floor on your house on top of Mt K instead? That would be even better. smile


Might as well build the burj khalifa so we have a snowcapped penthouse for summer smile
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 16:42

Originally Posted By: Homer
Originally Posted By: Steve777
Originally Posted By: Homer
Is this the third monthly record this year?
Amazing stuff if true


The Fourth (or fifth) monthly record broken in 2017 actually:

For Penrith, February 11 (46.9); July 30 (28.2); September 23 (37.3); December 14 (43.5) and 19 (44.1). Still impressive, even if only 22 years of record. The December record might still be 'soft'. The November record is 44.9 (23rd, 2014).


Thanks for that Steve. I was thinking the whole metro area (Sydney basin) for the 3 x monthly records. This includes I think stations with longer records than Penrith. It's just something I thought I read here the other day somewhere.


Penrith was just pipped by Richmond for the February Sydney Basin record. Richmond got to 47.0C that day vs 46.9C at Penrith.
Edit - I'd forgotten about the July record. (which does make 3 Greater Sydney records)
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 17:41

Would some people not include Richmond as a suburb of Sydney? I guess it depends on whether the definition is suburb or 'in the basin'.

Obs Hill still 31C and the Harbour site has just hit its max for the day. Looking like a warm night.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 17:51

Not including Richmond would be like not including Camden. That area should all be included as part of Sydney until you set foot near the mountains e.g Kurrajong
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 18:01

Originally Posted By: Jimi
Originally Posted By: Wave Rider
Originally Posted By: Jimi
Obs Hill, Richmond and Penrith have all achieved their forecast maximums (rounded). Well done BOM


Probably so for Obs Hill but Richmond and especially Penrith could go higher.


True but 44C - a record - was already a ballsy forecast. The scepticism was that we would fall short. No one would blame the BOM for undershooting Penrith if they’re going for 44C as it is.


Yep, and 44 was indeed the maximum so a good forecast by the BoM, but it certainly could've reached 45 if the high cloud held off a little longer.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 18:03

Just took the dog for a walk and it is still >38C outside.
Tomorrow has been upgraded and is now forecast for 43C here, the same for Singo, and Cessnock.
Singo fell short of the 42C forecast today, only got to 40C, the same as Maitland and Cessnock. Tocal got to 41C.
Williamtown (Newcastle Airport), got to 39C and going for 42C tomorrow, could get close to the record.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 18:19

It's a mute point I suppose, but I always consider Richmond, Penrith, Camden and such, as part of the Sydney basin.
Sydney has such a diverse range of climatic variations which means it's hard to nail down what is and what is not a part of Sydney.
I blame Observatory Hill for this as it is a very poor reflection of the true Sydney climate.
Unfortunately, it ain't going to change in a hurry.
I'm currently trying to explain to a friend of mine who lives just outside of London why in one part of Sydney it is 28 degrees, and just 40/50 km's away it is 44 degrees. They just don't get it and I don't blame them.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 19:12

Where does Sydney end? My definition roughly corresponds to the County of Cumberland, which is basically everywhere enclosed by the Nepean and Hawkesbury rivers, with a line passing somewhere South of Camden to the coast along the Southern Boundary of the Royal National Park. This is more or less the BOM's definition.

Another definition might be that a place is not part of Sydney if you see cows on the way there, no matter what route you take. By that definition, Richmond (and Windsor) are, for the time being, not part of Sydney. However, I tend to think that the Central Tablelands start on the other side of the Nepean, the Central Coast is North of the Hawkesbury, the Illawarra starts South of the Royal National Park and somewhere around Appin.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 19:37

I couldn't agree more Steve with your definition.
Currently 30.2 deg's here and still very muggy outside.
Thank god for air-con.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 19:41

Newcastle’s forecast shows us in coastal Sydney what we will be missing tomorrow. Despite being even more susceptible to sea breezes than Obs Hill, Newy is expected to hit 40C as the change arrives a few hours later.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 20:33

We don't have working aircon so it's bloody humid and sticky. I opened the window for a little while but that only made the humidity inside worse.

I'm sure a cold shower will fix it. grin

Btw it didn't even reach 30 here today!

Edit: Mum just asked if we wanted to go for a swim. Yep!!
Posted by: Funkyseefunkydo

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 20:38

Originally Posted By: Jimi
Newcastle’s forecast shows us in coastal Sydney what we will be missing tomorrow. Despite being even more susceptible to sea breezes than Obs Hill, Newy is expected to hit 40C as the change arrives a few hours later.
Newcastle can get a funnel effect from the valley. Can keep winds offshore all day while everywhere else is onshore.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 20:39

Btw in regards to the Mt K talk earlier, I reckon this location would be pretty good:

https://www.wunderground.com/personal-weather-station/dashboard?ID=INEWSOUT1234

It had a max of -0.4 on August 27th which IIRC, was the day Kangaloon got snow flurries.

https://www.wunderground.com/personal-we...20170901/mmonth
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 21:02

That's incredible, Penrith 32/21 at 8:30pm.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 21:34

Our house is built to solar standards, so we have a lot of internal mass, and insulation, with strategically placed windows, to catch the winter sun, and the summer breezes.

The problem is we rely on cool nights to help cool the house during summer, and tonight isn't cool! No AC, so we have to rely on fans to keep cool. That southerly tomorrow will be most welcome around here I can tell you.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 21:49

I will email Elon Musk to see if he can build a giant shade sail in earths orbit to shade Penrith and Richmond.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 21:55

On that note, like much of Sydney, Penrith is catching the high density disease. Right next to the train station are new high rise, high density apartments. Any house pulled down is likely to be replaced by 5-10 tiny villas or a multi story apartment. I wonder if the heat buildup on all that concrete is just enough to push the micro climate over the edge by fractions of degrees, which is whys so many heat records are being broken this year. Might be a contributing factor.
Posted by: Petar @ Sdny

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 21:56

I'm with you there, Rainbow Spirit. My apartment is the hottest thing since sliced bread. Outside its 29 degrees, inside 34 degrees and one fan that is blowing warm air around.

I am hoping the southerly comes a hour or two earlier than when expected. And boy do we need a decent Southerly buster for once, not weak changes that sputter up the coast and die.....
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 22:01

The loss of tree cover seen throughout particularly Western Sydney can also be another contributing factor, because the trees help contain the soil moisture that can keep the temperatures regulated. We've got to sort out this western Sydney temperature differential soon though.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 22:01

Feel for those living in richmond though 31-32C at 10PM with around 40% RH.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 22:13

Originally Posted By: Sidney
Feel for those living in richmond though 31-32C at 10PM with around 40% RH.


I'm relatively lucky then. It's only 27.8 degrees here. The humidity is stifling though.
And Morham, I think you are right re the built up areas.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 22:44

The max' inside our house today was 29C, our problem is although the internal mass moderates the temp's by absorbing the heat, it radiates it back out at night and takes ages to cool down. great in winter, not so great in summer. Although better than a low mass house which heats up fast, although it cools down faster.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 22:47

Morham is right about the micro climates being affected by all the mass in the new highrise buildings. They absorb lots of heat, and also block local breezes.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 23:10

Terry Hills's temperature has climbed back into the 30s now sitting at 30.1C . Also Richmond has seen a climb in temperatures to 31.1C. Quite the anomaly.
Posted by: Petar @ Sdny

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 19/12/2017 23:49

Um, is that the Southerly appearing to be near Gabo Island on the BoM South Coast Observations?

Gabo Island 19/11:30pm 21.7 14.9 17.7 78 2.5 SW 50 61 27 33
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 00:01

Originally Posted By: Petar @ Sdny
Um, is that the Southerly appearing to be near Gabo Island on the BoM South Coast Observations?

Gabo Island 19/11:30pm 21.7 14.9 17.7 78 2.5 SW 50 61 27 33

Sure is, according to Meteye it's running right on time.
Posted by: perrywinkle

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 03:53

31C and wind is picking up already at Wahroonga. Already been out tidying up bark fall and access, about to get an hour's shut eye before final tidy up outside and packing for evacuation inside. Today is shaping up to be much worse than the Very High Fire Danger Forecast locally. Conditions reminds me of a New Year's Day many years ago (about 15?) when the Upper Lane Cove Valley went up. Feeling edgy.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 05:28

It's been a bit hard to sleep, being such a warm night. It's 28 degrees outside, the cicadas are going full blast as they have been doing in short bursts since at least 4:00 AM. It's clear overhead with cloud to the East, retreating. There's a definite breeze, blowing from the NW. All high stations seem to have W-NW'ers, with light, flukey winds lower down.

For once, Bellambi is the hot spot, 32 degrees. It's nearly 28 at OH after a minimum of 26.4. The BOM are still going for 36 at OH and 42 at Penrith. The Southerly seems a way off, maybe Narooma?
Posted by: GringosRain

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 06:48

30 degrees here @ 640am. crazy. We had a nice looking bit of rain coming up in the models. GFS deleted it for the last 3 runs. This has happened many times now over the last few months, with rain being taken out at the last minute. I think Access looks a bit better, however I suspect GFS will be right again.
Kino what is your take on the models through till after Chrissy? All looks pretty marginal again. Northern inland looks to get the best of it, with this stupid HP ridge just running up NSW coast again.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 07:42

Moruya Airport was at 31.3C at 6am, and one hour later it was at 21.9C with the wind from the south. At 7:17am the wind was at 30kmh, gusting 50kmh from the south.

Maybe the change will get to Sydney sooner than expected?
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 08:14

Terry Hills hovered around 30C overnight. Would have been a record high min but the 9am reset messed them over as it hit a low of 25.4C at 9:10AM yesterday
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 08:18

Obs Hill is now getting bonus additions to yesterday’s maximum.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 08:41

Ulladulla had some very strange anomalies yesterday and today. At 4pm yesterday due to the influence of a NE breeze all day they reached a max' of 25.2C. Yet at 5am this morning it was 31.7C!
Posted by: LuvsaStorm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:01

Yes RS, I can attest to that. It seems all forcasted weather has been out by about 5-6 degrees. It has been much hotter near the coast than predicted. This morning the hot furnace blast out of the northwest had Sussex Inlet at 32C at 6am. As Periwinlke said earlier, makes us edgy. There is so much fuel around and the hot days have seen nearly every eucalypt shed bark and leaves like rain shocked
Southerly has just passed through dropping the temp to 21C:D
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:10

Already over 35C everywhere in the Hunter.
Tocal has come out of the blocks the hardest, 37.2C at 9am, and a possible crack at the 1990 record.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:11

It was about 35 across Sydney at 9:00. Hottest seems to have been Olympic Park at 36.8.

The change just seems to be reaching Point Perpendicular, so it's maybe 3 hours away.

"Yesterday's" max at OH will be the 9:00AM value of 35.3.

EDIT: that NW'er, which was up and running early, seems to have dropped right away. It's now quite still.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:13

We were still 28 degrees at midnight - for us that is bordering on hell!! smile

What a nasty night for all, looking forward to a cooler breeze later today.

looks like the change has gone through Temora (19 degrees) and currently around Young (24) and places west and south of there.

We are currently a bit over 28 - bonkers for this time of day here.

Enjoy the cooler breezes when they come everyone smile
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:16

Thank god the change is almost here - 33 at 6am was a rude shock. Seems to be pushing into Albion Park now (se'erlies there).
Posted by: Blair Trewin

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:19

35.3 at 9am is the second-highest 9am temperature on record for Obs Hill. Three of the top five of the daylight savings era (including the top two) have happened this year.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:22

Originally Posted By: Blair Trewin
35.3 at 9am is the second-highest 9am temperature on record for Obs Hill. Three of the top five of the daylight savings era (including the top two) have happened this year.


Very intersting. Thank you.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:24

Sydney airport is under the influence of light SErs atm, with the temp's hovering around 28c. I'll be keeping an eye on the airport as a sign of the southerly arriving.

Lets hope the southerly gets here sooner rather than later, although I remember not so long ago a southerly getting to Sydney, and then taking ages to get out to the western suburbs.
Posted by: kizz

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:24

Originally Posted By: DaveM
What a nasty night for all

Not all. I slept like a baby. Turned the fan off during the night as I was a bit cold. But hey, you know I love this stuff. My secret is to put in a hard day mentally or physically and then you can sleep easier that night.

In fact I am totally gutted about the change arriving before 6PM. Today was the best chance for us coasties to hit 40 and that may well be thieved.

I haven't time to check all sites but I notice OH has had yet another hot night erased by the 8am reset. 26.4 will be replaced by 25.4 yesterday at 0900. The reset giveth and the reset taketh away.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:25

Blessed be the reset.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:32

SE'erlies struggling - sorry peep's back to N again here. The better change is still way south near Ulladulla looking at the isotherms.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 09:45

KIZZ - you're just mad grin

Well you're in the season you love smile
A good couple of months of warmth to come for ya grin

I'm not a good sleeper though and last night hurt me. smile
However it's part of what happens in Summer each year. smile

I'm not King Canute so I know I can't change it by will. smile

Currently just under 29 at the airport - should get to low 30's before the change.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 10:00

Appears to have hit Forbes and approaching Cowra.

Young has definitely peaked too.

Hopefully here by mid day
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 10:19

Originally Posted By: DaveM

What a nasty night for all, looking forward to a cooler breeze later today.


I would have to agree with you there, very sticky and uncomfortable. For you it was just really warm- here not so warm but very humid.

We did get a blowtorch of 32 degrees at around 5:30am though.

I must say it feels rather pleasant today though, 33C no wind and full cloud cover with much less humidity than yesterday. I was hoping the southerly would not come up the coast so fast, but it will be here rather soon.
Posted by: jackwilliam

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 10:57

Would anyone know where I could achieve a good view of the storms coming in this afternoon?
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 11:10

Cowra temps now retreating - max 32 now 28 and falling.

Young made 27 but now 20.

Some flags near me showing variation in wind direction now.

Say another hour and we should hopefully have maxxed out.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 11:12

Originally Posted By: jackwilliam
Would anyone know where I could achieve a good view of the storms coming in this afternoon?

Faulkland Crescent Reserve, Parklea. Assuming we get any storms.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 11:15

OBS hill has already hit 38 with at least an hour before the southerly. Maybe it could do a heroes run to 40 before he change if were lucky.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 11:27

Originally Posted By: jackwilliam
Would anyone know where I could achieve a good view of the storms coming in this afternoon?

Not familiar with your area, but normally anywhere with a clear view of the Western horizon is good. Today, the cloud is streaming from the NW, so that will probably work today if there are storms (no sign of any)

---------

The flags on the Harbour Bridge are showing a barreling NW'er now, even if the OH site is showing a light Easterly (that would be at Fort Dennison).

At 11:00, the change had passed through Kiama but had not yet reached Port Kembla. Maybe it's about an hour away for Sydney coastal locations.

Penrith has hit 40. OH has been to 38.2 but dropped back a bit under cloud.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 11:44

First smidge of cooling now here, breeze has shifted.

We maxxed at 31.7 (airport) town reading may be higher.

Orange has dropped it's temp slightly too, wind direction changed.
Orange max 29 now 27.

Cowra max 34 now 28.

Looking forward to gradual cool down.
Posted by: jackwilliam

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 11:44

Many thanks Rainbow Spirit and Steve.

As of right now, I'm about to go to the mountains to look for that W/NW view. It'll be a bit of a trip, but hopefully by the time I get there, the storms will start developing (again, assuming they do develop today).
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:21

Southerly has arrived at Bellambi - 23c and 25knots cf Albion Park at 33.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:25

Temp has come back up a bit again out here.

Bit variable - proper cooling trend should hopefully kick in soon.

Cowra already cooling noticeably but not really kicking in yet here.

If it rains I reckon I might go stand in it - mind you - no sign of rain anywhere close, maybe later on this arvo with any luck.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:32

Could see the southerly on the Wollongong Radar now. Looks like it has just reached Helensburgh.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:36

Holy dooly, Newcastle Airport just hit 42.0C, may get the December record if it keeps going up.
Even Nobbys Head now at 39.0C, the heat has funnelled down there.
Posted by: ozthunder

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:41

Originally Posted By: jackwilliam
Would anyone know where I could achieve a good view of the storms coming in this afternoon?


Rooty Hill, but I would not bank on any Melbourne type storm event, but we live in hope.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:41

Originally Posted By: DerekHV
Holy dooly, Newcastle Airport just hit 42.0C, may get the December record if it keeps going up.
Even Nobbys Head now at 39.0C, the heat has funnelled down there.


Williamtown has already hit 42.8C according to BoM so it has matched its record so far.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:44

Bloody hell - just hit another late temp peak 30 minutes ago. 32.8

just when I thought the slide was underway!!! frown

Temp & wind all over the shop. Cowra has strong cooling but we are still vacillating. Annoying.

Orange temps still holding up as well after earlier sign of dropping.

Wonder if the topography (tablelands) are holding the change back slightly?

Newcastle 42 is HOT.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:45

Originally Posted By: Sidney
Originally Posted By: DerekHV
Holy dooly, Newcastle Airport just hit 42.0C, may get the December record if it keeps going up.
Even Nobbys Head now at 39.0C, the heat has funnelled down there.


Williamtown has already hit 42.8C according to BoM so it has matched its record so far.


Wow, that is some 68 years of records there.
The hottest spot in the Hunter right now too.
Tocal hot on it's heels though.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:51

The change is now around the Royal National Park. A few Sydney sites have reached 40, including Olympic Park and Bankstown. The Airport has fallen just short so far. A sea breeze has taken OH out of the race, it finished on 38.3.

Williamtown has a new December record, 43.2 so far, with a few hours before the change and not much cloud about. Penrith has reached 42.1 and may go higher.
Posted by: rain gauge

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 12:58

Sydney harbour has had a Mojave desert heatwave at 31C
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 13:02

lol rain gauge. Overnight is pretty much Singapore every night, hot and stuffy. A lot of people would've woken up with a hangover.

The first southerly will be a weak one, followed by a gradual increase in cooler wind in the evening. Basic rule I use - the warmer it gets, the stronger the change to follow. One tends to induce the other.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 13:35

43.3C at Penrith, 43.7C at Williamtown. Change is through the airport.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 13:47

Surprisingly the change has already hit Bankstown AWS.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 13:48

AP dropped 12 degrees in 5 minutes.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 13:57

That change has some punch. Sydney Airport dropped nearly 15 degrees in 15 minutes, from a max of 39.9 at 1:25PM to 25.1 at 1:40.
Posted by: Jimi

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:16

Sydney is warmer under the southerly than Newcastle under its seabreeze (though I expect Obs Hill will keep falling)
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:18

We are still struggling to drop much out here - still on about 30 degrees.

Orange has cooled more than us but we are really hanging on to that heat.

Cloud slowly thickening but sign of precip.

Maybe some showers overnight with some luck.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:20

The change is just arriving in Artarmon now.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:24

Looks like a few spots of showers forming near the BM's moving its way towards my area. Hope they explode when it hits the southerly line.

EDIT: just looked out my window. There are cumulus developed all over. one of them towards my south-east has quite a nice tower. Wouldn't be surprised if there are showers that form over there within the next few radar frames.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:26

We got a moderate easterly breeze here around 2:15pm, it dropped the temp from 39c to 36c, nothing spectacular just yet, a weird day for sure.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:31

And so the storms begin, with some cells materialising over the blue mountains. Hopefully I haven't jinxed it.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:37

Originally Posted By: ashestoashes
And so the storms begin, with some cells materialising over the blue mountains. Hopefully I haven't jinxed it.

If cells go from nothing to red core within a few frames, i think we have a pretty exciting afternoon to look forward to grin.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:41

Nothing out here yet.

Still holding on to the heat - still 30 degrees here HOWEVER

Orange has dropped quickly to 21 degrees - so SURELY!!!!! we must drop properly soon, boy it's dragged out.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:42

Little storm exploded here to the north of Wollongong, rumbling away nicely.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 14:55

FINALLY - we have dropped to 29, Orange is now 19 and even more interesting is that Cowra is only 19 currently - that's a WOW.

Cowra normally 2 or 3 degrees warmer than here.

Cooler air finally starting to affect us in Bathurst it seems. No precip in sight near me.

Yes - storms building rapidly around Lithgow/Bells line and moving SE
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:22

Getting some rain (big drops) and rumbling thunder. It's cooled down nicely.

EDIT: Sydney radar shows a gaggle of small cells moving across from the NW.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:34

Radar showing rapid cell growth and widespread activity now over the Sydney region.

Should be some interesting little storms about down there smile
Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:34

Huge drops here in Darling Harbour for 5 or so minutes now easing back. Oh it's looking nice and wet outside. Woo hoo! grin
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:36

Hope we get more later. Just a minute of on and off heavy shower and now its back to fine.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:36

Tocal given as a rounded 44C, as has Newcastle Airport and Penrith.
Not sure if Tocal quite got the record or not.
Obviously Williamtown is a definite.
Still 42C outside now, and was 43-44C driving home just then. (of course that is not an accurate weather station)
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:39

Hammering down in Narrabeen, sun out the whole time. Something more dangerous brewing over Parramatta
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:41

I'm getting a mixed bag of sweeping rain, thunder, lighting and sunlight.
Posted by: dknever

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:42

A bit of rain here in Drummoyne at the moment but that's about it.
Kind of glad because my cars not under cover.
Posted by: snowforus

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:46

It's still 30 C here at Lithgow, but there is the slightest feeling of coolness in the air.
Posted by: Seabreeze

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:49

Originally Posted By: DerekHV
Tocal given as a rounded 44C, as has Newcastle Airport and Penrith.
Not sure if Tocal quite got the record or not.
Obviously Williamtown is a definite.
Still 42C outside now, and was 43-44C driving home just then. (of course that is not an accurate weather station)
The exact high max temps are listed on the observations pages: Tocal 43.8ºC @ 3:26pm, Williamtown 43.7ºC @ 1:23pm, and Penrith 43.6ºC @ 2:22pm.
(The High temp column is towards the far right)
http://www.bom.gov.au/nsw/observations/nswall.shtml?ref=hdr#HUN
http://www.bom.gov.au/nsw/observations/sydney.shtml
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:51

Hey Snowforus - it's coming to you smile

We are now only 26 in Bathurst - should not be too much longer for you smile
Posted by: snowforus

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 15:54

No change yet. We did get a dozen or so spots of rain, though.
Posted by: perrywinkle

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:04

Change in Wahroonga now.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:12

Marrangaroo site now showing just under 26 degrees - should be cooling now Snowy smile

Great having a site there now, Lithgow was always a place that needed an AWS due to it's unique position smile
Posted by: J Pabo

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:30

Originally Posted By: DerekHV
Just took the dog for a walk and it is still >38C outside.
Tomorrow has been upgraded and is now forecast for 43C here, the same for Singo, and Cessnock.
Singo fell short of the 42C forecast today, only got to 40C, the same as Maitland and Cessnock. Tocal got to 41C.
Williamtown (Newcastle Airport), got to 39C and going for 42C tomorrow, could get close to the record.


I would say the 4 or so millimetres of rain yesterday morning, and 6mm the afternoon before kept some of the heat away. If we didn't get that, then it would have been hotter.
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:31

Originally Posted By: Seabreeze
Originally Posted By: DerekHV
Tocal given as a rounded 44C, as has Newcastle Airport and Penrith.
Not sure if Tocal quite got the record or not.
Obviously Williamtown is a definite.
Still 42C outside now, and was 43-44C driving home just then. (of course that is not an accurate weather station)
The exact high max temps are listed on the observations pages: Tocal 43.8ºC @ 3:26pm, Williamtown 43.7ºC @ 1:23pm, and Penrith 43.6ºC @ 2:22pm.
(The High temp column is towards the far right)
http://www.bom.gov.au/nsw/observations/nswall.shtml?ref=hdr#HUN
http://www.bom.gov.au/nsw/observations/sydney.shtml


Thanks for that.
Confirmed Williamtown has broken it's December record then, and so has Cessnock, which has snuck under the radar today. Now 42.8C set, beating 42.5C on 1st December 2004. (a few state records still stand from that particular date, including Singo)
Maitland Airport also got to 42.8C, but there are no long term records there. (only started in July last year)
Posted by: DerekHV

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:33

Originally Posted By: J Pabo
Originally Posted By: DerekHV
Just took the dog for a walk and it is still >38C outside.
Tomorrow has been upgraded and is now forecast for 43C here, the same for Singo, and Cessnock.
Singo fell short of the 42C forecast today, only got to 40C, the same as Maitland and Cessnock. Tocal got to 41C.
Williamtown (Newcastle Airport), got to 39C and going for 42C tomorrow, could get close to the record.


I would say the 4 or so millimetres of rain yesterday morning, and 6mm the afternoon before kept some of the heat away. If we didn't get that, then it would have been hotter.


Yep, was there in Whittingham yesterday morning for that brief shower.
Notice it just got to the forecast of 43C today, no records though.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:39

Lots of pockets of thunder around here, but unfortunately very little rain.
Posted by: snowforus

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:39

Still 28 here, but this is only the beginning!
The Marrangaroo site appeared unexpectedly. It's very welcome.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:40

Very dramatic sky looking west here in Chatswood.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:43

Originally Posted By: Rainbow Spirit
Lots of pockets of thunder around here, but unfortunately very little rain.


Same story here, Looks like south west Sydney has missed out for now. I'm just glad the heat is over.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:50

Heavy rain and hail here now. Plenty of cg's as well.
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:58

This one is looking and sounding dangerous. As soon as one of the media outlets said we wouldn't cop it as big as Melb yesterday, I knew we would
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 16:59

Getting dark and very noisy here. Frequent lightning and thunder, booms and crashes.

And what's the name of that other poster? Buggerthatwasclose! Multiple flash-bangs. No rain yet but it's not far away, that black cell near Pymble.

EDIT: heavy rain now, main strength passing to the North, however.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:02

Originally Posted By: Long Road Home
This one is looking and sounding dangerous. As soon as one of the media outlets said we wouldn't cop it as big as Melb yesterday, I knew we would

They should've known better given the northwest cloud band hanging around, this coupled with a cold front moving in.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:17

All clear now, we got a whopping 3.5mm! Love the cool SE breeze though.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:22

There's a severe thunderstorm warning out for the coast and Tablelands from Wollongong to Grafton for for LARGE HAILSTONES, DAMAGING WINDS and HEAVY RAINFALL, plus a detailed warning for cells near Colo Heights and Maroota, heading for Sydney's North.
Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:24

Steve777 which is funny Sydney is included because reading their Sydney forecast really doesn't give the impression of any notable inclement weather at all, lol.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:24

Looked at radar 10 mins ago it was completely clear for our area. Currently getting some massive drops.
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:27

Good time for them to update that Syd forecast
Posted by: snowforus

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:38

Down to 25C now.
Posted by: Wave Rider

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:46

Camden has had a spike to 30C in SW winds while the rest of Sydney, including hot Penrith are 25 degrees or less under that southerly/SEly change.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:46

Originally Posted By: Perfect Storm
Steve777 which is funny Sydney is included because reading their Sydney forecast really doesn't give the impression of any notable inclement weather at all, lol.


Yeh, was thinking the same when I read the forecast issued at 4.44 pm.
They've been a bit slow off the mark today.
Maybe it's their Christmas Party day. smile
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:47

Had heavy rain and hail driving through Frenchs Forest on the way home. Some of the CG's were epic with one at Roseville making the traffic lights flash amber.
Posted by: Homer

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 17:50

Originally Posted By: Wave Rider
Camden has had a spike to 30C in SW winds while the rest of Sydney, including hot Penrith are 25 degrees or less under that southerly/SEly change.


That's a good pickup WR. Quite unusual after such a strong southerly has passed through. Can't remember seeing something like that before.
Some of the wind gusts around the Metro and Illawarra were insane this afternoon.
Getting some loud rumbles again here from that storm passing to the north of here.
Posted by: Sidney

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 18:04

Even campbelltown is at 28.3C now under a SE wind. Whats going on?

EDIT: nevermind it slowly turned SSW now 28.7C
Posted by: Long Road Home

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 18:06

Actually it's a brief SW wind at Campbelltown
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 18:08

Originally Posted By: Homer
Originally Posted By: Wave Rider
Camden has had a spike to 30C in SW winds while the rest of Sydney, including hot Penrith are 25 degrees or less under that southerly/SEly change.


That's a good pickup WR. Quite unusual after such a strong southerly has passed through. Can't remember seeing something like that before.
Some of the wind gusts around the Metro and Illawarra were insane this afternoon.
Getting some loud rumbles again here from that storm passing to the north of here.


I recorded a 89km/h gust here which is my second highest since installing my WS.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 18:12

We are for a sticky night, the dewpoints are hovering around 20 degrees in many sites.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 18:17

Thunder is getting closer and louder again, but, as before, the main action seems to be passing to my North.

A swathe of Sydney's North from Hornsby to Manly has had falls between 12 and 18mm. Most other totals in Sydney have been under 10, mostly under 5.

EDIT: looks like the hot air is flighting back in the Camden- Campbelltown area. Maybe there's a small low down there.

Now the Sun's breaking out for the first time since the change. The low scud will be back, but that might be nearly it for storms here.
Posted by: CoastalStorm22

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 21:06

Not a terribly strong southerly that one, already winds are swinging north down south.
Posted by: ashestoashes

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 21:37

Originally Posted By: CoastalStorm22
Not a terribly strong southerly that one, already winds are swinging north down south.

According to Meteye we'll be getting another sustained burst in the early hours of tomorrow.
Posted by: Perfect Storm

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 22:34

Weak storm passing over. Light rain and a couple of grumbles. Saw one CC. Nice.

Now only if it would deliver some measurable falls.
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 22:42

Just heard a peel of thunder, then another. I checked the radar and see we are blessed by storm cells again. Just like mid afternoon, the radar is full of small cells. Now here come the rain - 4th storm if the day.
Posted by: Marts

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 20/12/2017 23:01

Not wrong Steve, its seems to be all round atm. Lightening and thunder in all directions atm. Its has been a good storm day/night for the basin.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 21/12/2017 09:41

Boy it was nice to open up the house and get a more pleasant air flow through.

House still a bit warm from retained heat, hopefully cooler tonight.

No precip out here but glad to read that others had some fun smile
Posted by: Steve777

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 21/12/2017 11:47

A cooler, wetter January to March quarter is on the cards for Eastern NSW: January to March Outlook

The current pattern does look set to switch from Christmas. Christmas and Boxing day look like writeoffs weatherwise for Sydney, improving after that with a short burst of heat late next week.

After that? It looks like a quite changeable and maybe stormy pattern.
Posted by: Kino

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 21/12/2017 12:00

Originally Posted By: Steve777
A cooler, wetter January to March quarter is on the cards for Eastern NSW: January to March Outlook

The current pattern does look set to switch from Christmas. Christmas and Boxing day look like writeoffs weatherwise for Sydney, improving after that with a short burst of heat late next week.

After that? It looks like a quite changeable and maybe stormy pattern.


Agree - if those TC's get going, we will see a sharp change in patterns. Hadley Cell should finally establish itself and monsoon should get going.
Posted by: DaveM

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 21/12/2017 12:04

Well you've made my day smile

I've been hoping it might be that way after the terribly hot summer we had earlier this year and then month after month of above average temps.
Posted by: Morham

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 21/12/2017 22:02

That was an astounding cool change yesterday. And what a glorious day today! Cool and cloudy.
Posted by: Max744

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 22/12/2017 08:17

Interesting here at the farm this morning, I checked the radar and there's a little blob right over us. The little blob has delivered around 10mm so far, and it's still bucketing down!!!
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 22/12/2017 09:02

Once again we got a smidgen of rain last night, about 2.3mm.
Posted by: Rainbow Spirit

Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 - 22/12/2017 13:56

And to add to that another 12mm in a short lived downpour at 11:45am.