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#1331025 - 05/06/2015 17:31 Re: NSW/ACT day to day weather [Re: Grant]
aussiestormfreak Offline
Meteorological Motor Mouth

Registered: 02/02/2011
Posts: 5641
Loc: Melbourne (Belgrave); Corryong...
Hey gang! Reporting from Merrylands... smile

Peaked at around 18C here in Sydney today I believe. Currently around 14C. Gloriously sunny with light winds. Only thing of note was convective showers bubbling away over the relatively warm waters of the East Australia Current, in response to the low and cold pool over the Tasman Sea. According to the radar they were at various points along the NSW coastline from about Merimbula all the way north to about Coffs Harbour; some of the showers looked surprisingly heavy! smile

A little anxious for the weather atm; showers are approaching Sydney from the southeast, which may dampen my Vivid Sydney plans tonight! =S


Edited by aussiestormfreak (05/06/2015 17:38)

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#1331028 - 05/06/2015 17:34 Re: NSW/ACT day to day weather [Re: Homer]
Dipole Offline
Weather Freak

Registered: 10/01/2013
Posts: 318
Loc: Hervey Bay 48m,Tuross Head
The one that impressed me for his knowledge and enthusiasm was David Ellyard http://www.sciencearchive.org.au/nova/ellyard.htm . Not a met guy but that physics background was clear.

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#1331029 - 05/06/2015 17:45 Re: NSW/ACT day to day weather [Re: EddyG]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1535
Loc: Blue Bay N.S.W
Originally Posted By: EddyG
Must admit Steve777 I used to like him in the early years, probably my favorite of the funny weather presenters is Today's Stevie Jacobs,
As for professionalism presenters I really like Gavin Morris, Gary Youngberry and even Nat Jeffery i didn't mind, I'm sure there's plenty more, just can't think of their names!!

Cloud has all but cleared, bit of a breeze has picked up, but overall a pleasant morning.


Everyone of em are into surfing. Not surprising that surfers dig weather stuff. TB loves the waves too. Wonder if Mr Creed surfs.

Yes a cold one up this way WR. Nobb and Norah both sub 15. Been some mean cloud out to sea. I just felt a spit now. or was it snow. Lol I bet u didn't expect TB comment to get so flamy dude.
Geez what does it take to get below av day at OH. Even on a day like this it comes in above av.

Hmm David Ellyard. His voice left me on edge. 'Where do ya get it!!!'


Edited by Knot (05/06/2015 17:49)

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#1331030 - 05/06/2015 17:50 Re: NSW/ACT day to day weather [Re: Grant]
Ron W at Walcha Offline
Weather Freak

Registered: 16/04/2008
Posts: 401
Loc: Walcha. NSW Northern Tableland...
One of the coldest days here for some time.Temp range of -5.3 to +4.7.Nasty breeze as well.

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#1331031 - 05/06/2015 18:14 Re: NSW/ACT day to day weather [Re: Grant]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 3140
Loc: Artarmon (Sydney North Shore)
Looking at the Sydney Observations, most people in the Sydney area today experienced a maximum of 15-17, including the Airport, which seems to have had another malfunction this afternoon. This is 1-2 degrees below average, and today felt like a cool day for early Winter. I remember when I checked the maxima for yesterday and Wednesday (19.0 and 18.4 respectively) thinking "that's ridiculous", but of course that's how warm it got on a sunny hill at tge edge of the CBD.

Observatory Hill is a quirky site, usually surging to 1-2 degrees warmer that most of Sydney on sunny afternoons when the sea breeze isn't active, after staying cool until midday. Another poster here pointed out a while back that it's right next to the heat sink of Barangaroo, currently a large expanse of concrete and rock.


Edited by Steve777 (05/06/2015 18:17)
Edit Reason: Clarification

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#1331033 - 05/06/2015 18:32 Re: NSW/ACT day to day weather [Re: Grant]
Homer Offline
Weatherzone Addict

Registered: 16/06/2007
Posts: 4924
Loc: Dural
Steve, completely agree that OH is probably not the ideal spot for an indicative city weather station. Then again, neither would the airport, Bondi, or Terry Hills be.
I think as city temps go, something in Centennial Park would be best.
Far enough away from the city concrete jungle, and equally affected by winds from all directions.
OH may have been a great site in the 1800's, but it really is quite ridiculous to have the official readings coming out of there now.

Not a bad effort in Cooma this evening........already minus 1.6 deg's at 6 pm. I can't really imagine walking down to get a Friday night pizza in those temps. It'd be great though!!

Homer


Edited by Homer (05/06/2015 18:32)

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#1331036 - 05/06/2015 19:08 Re: NSW/ACT day to day weather [Re: Knot]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 5443
Loc: Wollongong NSW
Originally Posted By: Knot
Everyone of em are into surfing. Not surprising that surfers dig weather stuff. TB loves the waves too. Wonder if Mr Creed surfs.

Yes a cold one up this way WR. Nobb and Norah both sub 15. Been some mean cloud out to sea. I just felt a spit now. or was it snow. Lol I bet u didn't expect TB comment to get so flamy dude.


Yeah it's quite interesting that they're all into their surfing. Surfing and weather go hand in hand. I bet most of us on here who live on the coast like all that type of stuff.

I note that a sneaky 14mm has been picked up at Pt Perpendicular. Speaking of that area, I'm going camping down at Jervis Bay (Greenpatch I think). Geography teacher's taking us. Has anyone here camped there?
_________________________
2016-17 season storm total for here= 15

Oct- 21st
Nov- 9th, 28th
Jan- 24th
Feb- 11th, 12th, 17th, 18th(2)
Mar- 13th, 16th, 22nd
Apr- 9th, 26th
May- 24th

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#1331044 - 05/06/2015 20:21 Re: NSW/ACT day to day weather [Re: Knot]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1535
Loc: Blue Bay N.S.W
Originally Posted By: Knot
Nobb and Norah both sub 15.


My bad. I keep falling for temps on the half hour on bom. Apparently temp at Nobbys reached 15.7 at 12.44pm. So it went from 14.3 at 12.30, then up to 15.7 and then back to 14.1 at 1pm. Certainly shot up quick and fell quick in that 30 mins.

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#1331046 - 05/06/2015 20:32 Re: NSW/ACT day to day weather [Re: Homer]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 3140
Loc: Artarmon (Sydney North Shore)
Homer - re OH - agree completely. It is unfortunate that the BOM didn't keep the old Centennial Park Roundhouse site going. Maybe it's time to transfer Sydney's major indicative site, as has been recently done in Melbourne.

* * *

We've had a few light showers here - enough to wet the roads. On the radar, it looks very localised. The BOM have just issued one of their 'retrocasts' for Sydney to include showers.


Edited by Steve777 (05/06/2015 20:34)
Edit Reason: Clarification

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#1331047 - 05/06/2015 20:38 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 5443
Loc: Wollongong NSW
I reckon that's a bit sus aye Knot. Sure is pretty erratic temp changes. Maybe there was a sunny break around that time.

Originally Posted By: Knot
Lol I bet u didn't expect TB comment to get so flamy dude.


Yeah you're right. But it's all good now, things have been sorted out. smile So Homer can put his popcorn away now lol wink poke I just need sleep now. Was pulling an all nighter with mates before it decided to rain just after 4am. Lol
_________________________
2016-17 season storm total for here= 15

Oct- 21st
Nov- 9th, 28th
Jan- 24th
Feb- 11th, 12th, 17th, 18th(2)
Mar- 13th, 16th, 22nd
Apr- 9th, 26th
May- 24th

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#1331051 - 05/06/2015 21:26 Re: NSW/ACT day to day weather [Re: Steve777]
Blair Trewin Offline
Weatherzone Addict

Registered: 13/07/2001
Posts: 3648
Loc: Melbourne, Australia
Originally Posted By: Steve777
Homer - re OH - agree completely. It is unfortunate that the BOM didn't keep the old Centennial Park Roundhouse site going. Maybe it's time to transfer Sydney's major indicative site, as has been recently done in Melbourne.



The last time I looked at it, there was actually no evidence of any anomalous trend at Obs Hill post-1910 (i.e. the urban influence on the site was already fully developed by 1910). This isn't so surprising as the most critical variable seems to be % of ground within a radius of 100-200 metres under buildings or other hard surfaces, and that wouldn't have changed much (even if the actual buildings have). That said, we reassess every few years and if Barangaroo (or any other new development) has a meaningful effect we'd probably start to pick it up over the next few years.

It's very hard to come up with a "representative" station for Sydney because the temperature gradients are so sharp (and would be even if the city didn't exist).

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#1331052 - 05/06/2015 21:43 Re: NSW/ACT day to day weather [Re: Grant]
aussiestormfreak Offline
Meteorological Motor Mouth

Registered: 02/02/2011
Posts: 5641
Loc: Melbourne (Belgrave); Corryong...
A couple of hours ago I was starting to regret my decision not to go into the City for Vivid Sydney, as most of the showers seemed to be weakening before coming ashore. But after checking againjust 10-20 minutes ago (after dining out and watching a movie here in Parramatta) I think I made the right call! smile

Currently around 12C both here in Parramatta and in the City. smile

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#1331053 - 05/06/2015 21:55 Re: NSW/ACT day to day weather [Re: Steve777]
Rob_S Offline
Cloud Gazer

Registered: 12/02/2004
Posts: 37
Originally Posted By: Steve777
Snow in Sydney: http://trove.nla.gov.au/ndp/del/article/28023886

I think that the reports from 1836 are credible. There would have been enough people in Sydney at the time who would have been familiar with snow.

There are also reports of settled snow in the Central Coast hinterland at elevations of about 250-300 metres (e.g Kilnura) in July 1965. Also at Mt Sugarloaf 40 km from Newcastle (about 400m). A link and photos were posted on the Snow forum a few months back. At that time, snow was reported in Hornsby (about 220 metres), although it didn't settle.


I have my doubts about reports of snow in coastal Sydney, but not the Hornsby Plateau.

A small band of light rain/showers moved into Western Sydney at about 3am last night with the temperatures around the 5c mark at Richmond and Penrith.

I don't think i've seen precipitation fall at those sort of temperatures in the Sydney basin before, so I guess the odd flake is possible on the Cumberland Plain.

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#1331057 - 05/06/2015 23:09 Re: NSW/ACT day to day weather [Re: Blair Trewin]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 3140
Loc: Artarmon (Sydney North Shore)
Blair - thank you for your response. The OH site is away from the main CBD. I expect that the heat island effect would be less than, say, a hypothetical site in Hyde Park.

I recall reading on this blog that the OH site was moved a couple of hunderd metres around 1917. This seemed to haved resulted in a jump in average temps, especially in Winter, e.g. July Max from about 15 to about 17. Summer temps seem to have been unaffected. Even so, it seems to me that temperatures prior to the move, while of historical interest, should be excluded from published averages for the site.

Rob_S: reports of snow in Sydney city were published in 1836. It was the first snow to that date and maybe a once in a century event: http://trove.nla.gov.au/ndp/del/article/32151652?

The climate does seem to have been colder in the 19th century.

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#1331059 - 05/06/2015 23:32 Re: NSW/ACT day to day weather [Re: Steve777]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1535
Loc: Blue Bay N.S.W
Originally Posted By: Steve777


The climate does seem to have been colder in the 19th century.


Napoleon would have agreed Steve.

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#1331071 - 06/06/2015 07:46 Re: NSW/ACT day to day weather [Re: Steve777]
Jon77 Offline
Weather Freak

Registered: 06/04/2012
Posts: 427
Originally Posted By: Steve777
Blair - thank you for your response. The OH site is away from the main CBD. I expect that the heat island effect would be less than, say, a hypothetical site in Hyde Park.

I recall reading on this blog that the OH site was moved a couple of hunderd metres around 1917. This seemed to haved resulted in a jump in average temps, especially in Winter, e.g. July Max from about 15 to about 17. Summer temps seem to have been unaffected. Even so, it seems to me that temperatures prior to the move, while of historical interest, should be excluded from published averages for the site.

Rob_S: reports of snow in Sydney city were published in 1836. It was the first snow to that date and maybe a once in a century event: http://trove.nla.gov.au/ndp/del/article/32151652?

The climate does seem to have been colder in the 19th century.


I think I can envisage what the 1836 snowfall would have been like had we been there. It would have been very similar in nature to the spring time mid May snowfalls you can get in England every so often.

The streets of Sydney would not have been deep and crisp with fine snow, it would have been the wet slushy variety giving a wet (all be it white) slushy covering. It is possible for snow like this to fall when general temps are in the +7c to +8 in the right conditions, and I think that would have been the case here, especially as reports say it was an early morning fall. Sounds to me like there was rapid cooling under heavy rain which was enough to turn it to wet snow for a while and probably give a covering on favored surfaces like grass. Only a small area would have had snow that stuck, the majority would have had a continuation of heavy rain or a bit of sleet. It was probably a surprise to some in Sydney at that time that there were people reporting snow sticking as they would have only seen rain.

This would have melted rapidly once the snow stopped, it probably even reverted back to rain just before clearing. An hour after the event no snow would have remained in the ground, it would have all melted and afternoon temps could have even climbed up to 17c - 18c in sunny spells.

I don't doubt it was snow but it was a sequence of incredibly rare events for Sydney that brought this. Would have loved to have seen a synoptic chart from this event.


Edited by Jon77 (06/06/2015 07:49)

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#1331084 - 06/06/2015 09:22 Re: NSW/ACT day to day weather [Re: Jon77]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1535
Loc: Blue Bay N.S.W
Originally Posted By: Jon77
Would have loved to have seen a synoptic chart from this event.


Interesting read on development of weather charts here

Chart Development

Full steam ahead to warmer day today. Forecast of 19 for Newie

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#1331085 - 06/06/2015 09:34 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 5443
Loc: Wollongong NSW
Already shaping up to be a rather nice day with mostly sunny skies and light winds. Expected to reach a nice top of 19C. Hasn't been 19 since Friday 29th May.
_________________________
2016-17 season storm total for here= 15

Oct- 21st
Nov- 9th, 28th
Jan- 24th
Feb- 11th, 12th, 17th, 18th(2)
Mar- 13th, 16th, 22nd
Apr- 9th, 26th
May- 24th

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#1331091 - 06/06/2015 15:21 Re: NSW/ACT day to day weather [Re: Grant]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1535
Loc: Blue Bay N.S.W
Hit 20 at Nobbys today. By by winter for another 3 days according to forecast. A man shouldn't have to sweat just standin around in winter. No sir eee

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#1331092 - 06/06/2015 15:28 Re: NSW/ACT day to day weather [Re: Grant]
HumphreyBear Offline
Weatherzone Addict

Registered: 31/01/2008
Posts: 4167
Loc: Southern Sydney
It's a fair bet that the past week may be the coldest of the winter, so this is the start of spring lol. Beautiful days for hiking in the Blue Mountains though, without any wind. The baked beans are firmly in the tin today, it's even Calm at the Kurnell AWS which is a pretty rare sight.

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