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#53494 - 21/05/2007 09:09 Re: Old Snow Pics and High Country ramblings
DaveM Offline
Meteorological Motor Mouth

Registered: 21/05/2001
Posts: 10130
Loc: Bathurst NSW about 700 m asl
But at least it will be nice and cool for you, a "feel" of wintry times. Long overdue.

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#53495 - 21/05/2007 10:49 Re: Old Snow Pics and High Country ramblings
Blair Trewin Offline
Weatherzone Addict

Registered: 13/07/2001
Posts: 3780
Loc: Melbourne, Australia
Quote:
Originally posted by Blizz:
I think the positive anomalies for Australia for May could well challenge April 2005. Blair would know more.
The last time we checked last week the mean temperature anomaly for May (+3.3) was running about 0.7 ahead of April 2005, although you'd expect that to settle back a bit over the second half of the month. Definitely looks an extreme month though.

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#53496 - 21/05/2007 13:46 Re: Old Snow Pics and High Country ramblings
bigwilly Offline
Weatherzone Mod and Photog

Registered: 25/09/2002
Posts: 6543
Loc: Junee - just north of the 'Bid...
Looks like the alps (mostly Vic) are going to get there first fall for the season in the coming hours.

Hotham has been hovering around 0 for most of today with showers falling. So when the colder arrives in the following hours, there shouldn't be much of a proble to get 5-10cm providing the moisture doesn't dry up too much post-frontal.

:cheers: Will
_________________________
YTD Rainfall = 281.0mm (Avg to March 117.0mm)
MTD rainfall March = 34.7mm(Avg 41.3mm)
February 2011 total = 203.9mm (Avg 37.8mm)
2010 Rainfall: 759.3mm (Annual Avg: 521.5mm)

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#53497 - 21/05/2007 14:19 Re: Old Snow Pics and High Country ramblings
Laurier Williams Offline
Weatherzone Addict

Registered: 01/02/2001
Posts: 2192
Loc: Millthorpe, 970m, Central W NS...
The WZ GFS snow forecast is going for 10 to 20cm overnight. I'd be surprised if there's anything in it for the CT or BMs, though a few flakes around Shooters might be possible, as Blizz said. Latest LAPS and mesoLAPS have moved the colder air a bit southwards, with the 540 line only up to around Cooma. But the timing is good, with the coldest air moving throuh around daybreak.
_________________________
Caution: Any items linked to in this post may change and become irrelevant or expire over time. Use good meteorological practice and ALWAYS check date and time on charts before using them.

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#53498 - 22/05/2007 10:01 Re: Old Snow Pics and High Country ramblings
Habs Offline
Weatherzone Addict

Registered: 13/03/2005
Posts: 1109
Loc: Blacktown
brrrr....

nice to see the longer range gfs having the 540 line creeping up and up to vic... i know its a way off, but its a nice trend, beats last year where the 540 line rarely showed its head..

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#53499 - 22/05/2007 10:06 Re: Old Snow Pics and High Country ramblings
pete28 Offline
Weatherzone Addict

Registered: 08/01/2007
Posts: 1119
Loc: Christchurch, New Zealand
Hey Habs can you please explain to me what the "540 line" is and how it affects the colder weather pattern for Victoria?

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#53500 - 23/05/2007 12:05 Re: Old Snow Pics and High Country ramblings
SnowMac Offline
Weather Freak

Registered: 30/03/2003
Posts: 534
Loc: Tallai SE QLD approx 40 metres

Clare SA 1901 snowfall

Saddleworth SA 1901 Snowfall

Lady Milne's residence at Mount Lofty after a snowfall 1901

Snow at Mount Lofty, 29 August 1905

Snow at Peterborough railway yard, 20 July 1895.


Snow storm at Peterborough on 23rd June 1908 ( looks pretty heavy}

After a snowstorm at Lobethal, 28 July 1901

[Ed. Fixed the broken image link. Thanks for the heads-up Stormygirl.]

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#53501 - 23/05/2007 12:48 Re: Old Snow Pics and High Country ramblings
bigwilly Offline
Weatherzone Mod and Photog

Registered: 25/09/2002
Posts: 6543
Loc: Junee - just north of the 'Bid...
Quote:
Originally posted by pete25:
Hey Habs can you please explain to me what the "540 line" is and how it affects the colder weather pattern for Victoria?
From the WZ glossary:
Quote:

Thickness Thickness usually refers to the depth of the 1000-500 hPa layer in the atmosphere. However charts are also produced for thicknesses of other layers in the atmosphere as well. The thickness gives an indication of the mean temperature within a layer; lower thicknesses indicate colder air, higher thicknesses warmer air.

Forecast MSL charts will also often show the 1000-500 hPa thickness as dashed lines. The thickness on these charts is usually given in decametres. So the 540 line indicates the 1000-500 hPa layer is 5400 metres deep.

Thickness charts in general and the 1000-500 hPa thinkness charts in particular are also very useful for determining baroclinic zones and development. Thickness lines can also indicate the steering direction of surface highs and lows.
Pretty much the '540' over a region is the first sign of a possible cold spell. So when you begin to see thickness in the sub 540 area, you're a good chance, providing that moisture and triggers are there, of getting a few flakes.

:cheers: Will
_________________________
YTD Rainfall = 281.0mm (Avg to March 117.0mm)
MTD rainfall March = 34.7mm(Avg 41.3mm)
February 2011 total = 203.9mm (Avg 37.8mm)
2010 Rainfall: 759.3mm (Annual Avg: 521.5mm)

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#53502 - 23/05/2007 15:16 Re: Old Snow Pics and High Country ramblings
Laurier Williams Offline
Weatherzone Addict

Registered: 01/02/2001
Posts: 2192
Loc: Millthorpe, 970m, Central W NS...
That's why the 540 line is blue on the WZ model charts wink More boringly, the 576 line, which is red, suggests heatwave weather in southern AUS. The 520 line is drawn in purple, but only the Taswegians and Kiwis get to see much of it.
_________________________
Caution: Any items linked to in this post may change and become irrelevant or expire over time. Use good meteorological practice and ALWAYS check date and time on charts before using them.

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#53503 - 23/05/2007 16:10 Re: Old Snow Pics and High Country ramblings
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17558
Loc: NE suburbs, Adelaide, South Au...
SnowMac, thanks for posting up those old SA snow pics!! I'd love to see something like that this winter here.... Last time anything like that was really August 1996... when I was lucky to be at Lobethal in the Adelaide Hills..

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#53504 - 24/05/2007 10:05 Re: Old Snow Pics and High Country ramblings
bigwilly Offline
Weatherzone Mod and Photog

Registered: 25/09/2002
Posts: 6543
Loc: Junee - just north of the 'Bid...
GFS is hinting at a very interesting system for mid next week. With a fair amount of rain progged for the SE, there is a small cold pool of -2 or so at 850 wandering over the state with the rain.

Even if its not a snow producer, it could well give the SE another decent drink.

:cheers: Will
_________________________
YTD Rainfall = 281.0mm (Avg to March 117.0mm)
MTD rainfall March = 34.7mm(Avg 41.3mm)
February 2011 total = 203.9mm (Avg 37.8mm)
2010 Rainfall: 759.3mm (Annual Avg: 521.5mm)

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#53505 - 24/05/2007 10:57 Re: Old Snow Pics and High Country ramblings
Blizzard Offline
Meteorological Motor Mouth

Registered: 31/03/2001
Posts: 10343
Loc: Blue Mountains
Lovely shots Teck and Mac and nice to see you around Mac. smile

For those that are interested, this is another Katoomba Falls shot I took last week.

Katoomba Falls - about 140k
_________________________
BoM Storm Spotter, snow chaser, webmaster for www.blackheathweather.com

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#53506 - 25/05/2007 08:33 Re: Old Snow Pics and High Country ramblings
bigwilly Offline
Weatherzone Mod and Photog

Registered: 25/09/2002
Posts: 6543
Loc: Junee - just north of the 'Bid...
Interesting little observation on the train this morning: All through the flood plains of the Nepean around Emu Plains and Penrtih (as seen from the train) there was a substantial frost, however Penrith AWS (located out in the lakes development) recorded a minimum of 4.4C.

Its also the first frost that I have seen this Autumn.

:cheers: Will
_________________________
YTD Rainfall = 281.0mm (Avg to March 117.0mm)
MTD rainfall March = 34.7mm(Avg 41.3mm)
February 2011 total = 203.9mm (Avg 37.8mm)
2010 Rainfall: 759.3mm (Annual Avg: 521.5mm)

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#53507 - 25/05/2007 11:00 Re: Old Snow Pics and High Country ramblings
aslaws Offline
Weatherzone Addict

Registered: 13/05/2002
Posts: 1792
Loc: Narrow Neck Rd, Katoomba 1020m...
Light frost here in Wentworth Falls this morning - 3.0C minimum. Favoured positions eg Central Park in south Wenty had a pretty good covering in places.

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#53508 - 26/05/2007 15:56 Re: Old Snow Pics and High Country ramblings
Andrew Miskelly Offline
Weatherzone Webmaster

Registered: 15/11/2001
Posts: 3149
Loc: Mittagong, NSW
Another annual winter-time institution comes along tonight with the first Rugby Test on.

I'll have a few ales of the dark variety chilling on the back step just as soon as it gets colder out there than in the fridge.

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#53509 - 26/05/2007 16:41 Re: Old Snow Pics and High Country ramblings
Blizzard Offline
Meteorological Motor Mouth

Registered: 31/03/2001
Posts: 10343
Loc: Blue Mountains
Indeed. I will do the same with my rum although not as cold here of course.

Magic here today. Barely a breath of wind and so quiet apart from the steam trains in the distance. Look forward to frontal rain midweek and maybe some other stuff at some point, later on.
_________________________
BoM Storm Spotter, snow chaser, webmaster for www.blackheathweather.com

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#53510 - 26/05/2007 18:25 Re: Old Snow Pics and High Country ramblings
Andrew Miskelly Offline
Weatherzone Webmaster

Registered: 15/11/2001
Posts: 3149
Loc: Mittagong, NSW
Well done Blizz.

Actually, we're looking down the barrel of getting further into the year without a sub-zero minimum than any of the previous years on record (50) at the post office. It's a tad academic - we've been down to 0.1° there and it was -1° here at home that night but interesting all the same. Tonight's probably our last chance before May 31 but I can't see it being colder than last night (0.2°).

Last year we'd been below -5° by this point.

Here are the dates of the first sub-zero minimum each year previously.

Code:
1957 15 April
1958 21 May
1959 10 May
1960 25 April
1961 08 May
1962 28 April
1963 05 April
1964 12 April
1965 22 March
1966 10 April
1967 15 May
1968 15 May
1969 24 April
1970 29 April
1971 01 May
1972 26 April
1973 09 May
1974 21 May
1975 03 April
1976 23 April
1977 10 April
1978 27 April
1979 12 April
1980 28 April
1981 29 April
1982 30 April
1983 18 April
1984 26 April
1985 20 April
1986 28 April
1987 11 April
1988 12 May
1989 25 May
1990 19 May
1991 22 April
1992 19 May
1993 20 April
1994 07 May
1995 03 April
1996 09 April
1997 08 April
1998 14 April
1999 22 April
2000 22 April
2001 13 April
2002 08 May
2003 31 May   <--
2004 26 April
2005 30 April
2006 03 April
2007 -

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#53511 - 26/05/2007 19:51 Re: Old Snow Pics and High Country ramblings
bigwilly Offline
Weatherzone Mod and Photog

Registered: 25/09/2002
Posts: 6543
Loc: Junee - just north of the 'Bid...
Could that, as has already been mentioned, be a sign that the high pressure systems haven't been as strong? Or is it more sinister than that?

:cheers: Will
_________________________
YTD Rainfall = 281.0mm (Avg to March 117.0mm)
MTD rainfall March = 34.7mm(Avg 41.3mm)
February 2011 total = 203.9mm (Avg 37.8mm)
2010 Rainfall: 759.3mm (Annual Avg: 521.5mm)

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#53512 - 26/05/2007 21:04 Re: Old Snow Pics and High Country ramblings
Andrew Miskelly Offline
Weatherzone Webmaster

Registered: 15/11/2001
Posts: 3149
Loc: Mittagong, NSW
I don't think there's anything too untoward about it. As you say there's been less really stable weather and there's been more moisture about with the H-belt struggling to find its way north. I would like to have seen a bit more in the rainfall column as a result but what can you do.

Just under 2.5° here now. The beer's out the back and the Wobblies have got work to do!

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#53513 - 26/05/2007 22:35 Re: Old Snow Pics and High Country ramblings
TrenthamStormchasers Offline
Meteorological Motor Mouth

Registered: 15/04/2001
Posts: 6258
Loc: Trentham 705m
What a difference 13 mtrs and a frost hollow makes.....

Last night my min at 573m was 4.3C with a heavy dew.....half a km away at 560m it was 0.5C with a good frost!! Half an hour ago it was 7.6C at 573m and 3.8C at 560m!!! :bounce:

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