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#1444703 - 13/12/2017 09:32 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
kizz Offline
Weatherzone Addict

Registered: 11/02/2002
Posts: 1991
Loc: Beacon Hill, Sydney 152m asl
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?

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#1444705 - 13/12/2017 09:41 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: Long Road Home]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 6877
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.


Edited by Wave Rider (13/12/2017 09:43)
_________________________
The longer you wait for storms, the more you appreciate them.

2017-18 storm total= 11
Oct 25th
Nov 6th(3), 17th
Dec 2nd, 14th
Jan 2nd(2), 8th(2), 9th

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#1444706 - 13/12/2017 09:45 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Jimi Offline
Weather Freak

Registered: 15/03/2004
Posts: 919
Loc: Cammeray
WR, any idea of the timing of the change on Tuesday/Wednesday and whether any of that heat will get to the coast?

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#1444708 - 13/12/2017 09:51 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 6877
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 .
_________________________
The longer you wait for storms, the more you appreciate them.

2017-18 storm total= 11
Oct 25th
Nov 6th(3), 17th
Dec 2nd, 14th
Jan 2nd(2), 8th(2), 9th

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#1444711 - 13/12/2017 10:28 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Long Road Home Offline
Meteorological Motor Mouth

Registered: 08/10/2007
Posts: 8520
Loc: Northern Beaches Syd
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.

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#1444717 - 13/12/2017 12:32 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 4227
Loc: Artarmon (Sydney North Shore)
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.


Edited by Steve777 (13/12/2017 12:42)

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#1444718 - 13/12/2017 12:52 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
DaveM Offline
Meteorological Motor Mouth

Registered: 21/05/2001
Posts: 10132
Loc: Bathurst NSW about 700 m asl
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

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#1444722 - 13/12/2017 13:04 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
GringosRain Offline
Weatherzone Addict

Registered: 19/06/2007
Posts: 1577
Loc: Quorrobolong NSW
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.

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#1444726 - 13/12/2017 13:45 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: Steve777]
kizz Offline
Weatherzone Addict

Registered: 11/02/2002
Posts: 1991
Loc: Beacon Hill, Sydney 152m asl
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.

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#1444727 - 13/12/2017 13:46 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Jimi Offline
Weather Freak

Registered: 15/03/2004
Posts: 919
Loc: Cammeray
More than 15C separates Sydney Harbour and Penrith currently

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#1444728 - 13/12/2017 13:50 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
DaveM Offline
Meteorological Motor Mouth

Registered: 21/05/2001
Posts: 10132
Loc: Bathurst NSW about 700 m asl
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.

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#1444730 - 13/12/2017 14:30 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: Jimi]
rain gauge Offline
Weatherzone Addict

Registered: 16/02/2006
Posts: 4521
Loc: Gorokan NSW 4klm West of the ...
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.
_________________________
June-195.3mm
YTD-505.1 mm
2017 rainfall-1172.1mm





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#1444738 - 13/12/2017 15:19 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 4227
Loc: Artarmon (Sydney North Shore)
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.

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#1444741 - 13/12/2017 15:34 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: Steve777]
Jimi Offline
Weather Freak

Registered: 15/03/2004
Posts: 919
Loc: Cammeray
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

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#1444747 - 13/12/2017 16:01 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 4227
Loc: Artarmon (Sydney North Shore)
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.

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#1444749 - 13/12/2017 16:08 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Long Road Home Offline
Meteorological Motor Mouth

Registered: 08/10/2007
Posts: 8520
Loc: Northern Beaches Syd
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

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#1444752 - 13/12/2017 16:26 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Sidney Offline
Weather Freak

Registered: 20/12/2013
Posts: 438
Loc: Macquarie fields ( South west ...
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.

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#1444755 - 13/12/2017 16:37 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
rain gauge Offline
Weatherzone Addict

Registered: 16/02/2006
Posts: 4521
Loc: Gorokan NSW 4klm West of the ...
Oh I thought the Sydney harbour site was fort Denison also.
There you go. You really do learn something new everyday.
_________________________
June-195.3mm
YTD-505.1 mm
2017 rainfall-1172.1mm





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#1444762 - 13/12/2017 17:47 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 6877
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.
_________________________
The longer you wait for storms, the more you appreciate them.

2017-18 storm total= 11
Oct 25th
Nov 6th(3), 17th
Dec 2nd, 14th
Jan 2nd(2), 8th(2), 9th

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#1444764 - 13/12/2017 18:38 Re: NSW - First summer heatwave of 2017, accompanied by thunderstorm activity 12/12/17 - 20/12/17 [Re: DerekHV]
Rainbow Spirit Offline
Weather Freak

Registered: 10/11/2010
Posts: 564
Loc: Green Valley, just west of Liv...
Is that rain off the coast of Sydney?

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