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Predictions: July 25 - August 2nd (2)

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#1043152 - 29/07/10 08:55 pm Re: Predictions: July 25 - August 2nd (2) [Re: Cliff-jumper_2000]
snowblowa
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Well, there are a few certainties we can all cling to for the mean time. First, this really is only the second "real" complex low pressure system we have seen this winter so far to push up, and that in itself is a god damn tragedy!!! BUT, the good news is, being quite large and complex, the embedded cells and associated fronts have plenty of potential to unfold better than progged, due to the unpredictable nature of clusters of low pressure cells and cold pools within a large area of low pressure. Also, there should be quite reasonable amounts of moisture left lingering in the atmosphere from the double toughs and weak sat system, thus potentially being sucked into and used by each cell and progged to move thru Sun-Wed. AND, the cold pool the 850 charts have progged to spew up in a hurry early sunday morning, will in my view, drop the freezing level to around 700 metres at best, which will mean accumulation at the 1500-200m level should be rather rapid, given the snow should be quite dry, and persist for several days mind you. PLUS, in the wake of the intial LPS, I think air mass and fetch will be unstable enough to maintain decent accumulations into Monday and Monday night, with potentiial moisture feeds from the progged cut off just off the coast of Eden. SO, to summarise, we have plenty to be upbeat about, cause geez, its been a shite of season, and without snowmaking it could be the worst in years, but we have not seen a system thus yet that has the potential to deliver extended days of decent accumulation. best case senarios could surprise many, and I am feeling that the embedded cells are going to deliver more than expected. Sunday night will be dope in my view, and Wednesdays front just needs to peak at the right time before the trailing high does its thing, and we should see another 10-20cm. So keep the faith out there my friends, in a bleak season, we may look back to this coming week as on of the better snow weeks. Sad, I know, but I think its gunna puke hard at times and surprise lots.

IMO


Edited by Sandy (29/07/10 09:19 pm)
Edit Reason: IMO added

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#1043155 - 29/07/10 08:58 pm Re: Predictions: July 25 - August 2nd (2) [Re: snowblowa]
snowblowa
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I meant 1500-2000m level, sorry, coopers pale ale in one hand and typing fast don't really mix! \:D
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#1043160 - 29/07/10 09:06 pm Re: Predictions: July 25 - August 2nd (2) [Re: snowblowa]
Bilza_Skis
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IMO
25 mm of rain (we've already had 14 mm so far)
followed by cold air and snow
looking at it atm
there could be 20-50 cm between Saturday and Monday

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#1043167 - 29/07/10 09:21 pm Re: Predictions: July 25 - August 2nd (2) [Re: Bilza_Skis]
afaict
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All models now really agree on the timing of the main front, overnight Saturday. Though, the snow level is looking to be boderline even before the main front hits, so we could be in for a suprise before hand.

9PM GFS has a downgrade on moisture for Sunday / Monday. Pressure I imagine being the main culprit.

Still a 20cm system for most resorts IMO, and a set up that looks fantastic...MUCH better then what was being predicted earlier this week thats for sure.

Really depending on how much the low strenghtens in the tasman, its a set up that could easily see more then 20cm. Just a hard one to call.

\:\)

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#1043173 - 29/07/10 09:27 pm Re: Predictions: July 25 - August 2nd (2) [Re: snowblowa]
The Plowking
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 Originally Posted By: snowblowa
Well, there are a few certainties we can all cling to for the mean time. First, this really is only the second "real" complex low pressure system we have seen this winter so far to push up, and that in itself is a god damn tragedy!!! BUT, the good news is, being quite large and complex, the embedded cells and associated fronts have plenty of potential to unfold better than progged, due to the unpredictable nature of clusters of low pressure cells and cold pools within a large area of low pressure. Also, there should be quite reasonable amounts of moisture left lingering in the atmosphere from the double toughs and weak sat system, thus potentially being sucked into and used by each cell and progged to move thru Sun-Wed. AND, the cold pool the 850 charts have progged to spew up in a hurry early sunday morning, will in my view, drop the freezing level to around 700 metres at best, which will mean accumulation at the 1500-200m level should be rather rapid, given the snow should be quite dry, and persist for several days mind you. PLUS, in the wake of the intial LPS, I think air mass and fetch will be unstable enough to maintain decent accumulations into Monday and Monday night, with potentiial moisture feeds from the progged cut off just off the coast of Eden. SO, to summarise, we have plenty to be upbeat about, cause geez, its been a shite of season, and without snowmaking it could be the worst in years, but we have not seen a system thus yet that has the potential to deliver extended days of decent accumulation. best case senarios could surprise many, and I am feeling that the embedded cells are going to deliver more than expected. Sunday night will be dope in my view, and Wednesdays front just needs to peak at the right time before the trailing high does its thing, and we should see another 10-20cm. So keep the faith out there my friends, in a bleak season, we may look back to this coming week as on of the better snow weeks. Sad, I know, but I think its gunna puke hard at times and surprise lots.

IMO

Good Post but break it up. I have a headache!
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#1043176 - 29/07/10 09:33 pm Re: Predictions: July 25 - August 2nd (2) [Re: The Plowking]
The Plowking
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Nice secondary trough proged for 10pm Sunday on Bom 4 dayer
http://www.bom.gov.au/products/IDG00074.shtml
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And I think he is a boozer,

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#1043179 - 29/07/10 09:37 pm Re: Predictions: July 25 - August 2nd (2) [Re: snowblowa]
Donza
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 Originally Posted By: snowblowa
I meant 1500-2000m level, sorry, coopers pale ale in one hand and typing fast don't really mix! \:D

I say well played sir...great post..
I gotta agree with you on the snowlevel increasing accumulations...
actually agree with you on alot of things..this system, being based around a "bombing" low in bass strait has crazy potential to draw up moisture and wrap it
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#1043248 - 29/07/10 11:09 pm Re: Predictions: July 25 - August 2nd (2) [Re: Donza]
snowblowa
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Heh heh, sorry plowking, yeah I got so caught up blurting my thoughts out I forgot to break it up a bit! That's what a half decent weather event will do in a terrible season will do to ya.........geez, think of all the decent skiers and boarders out there sittin at home waiting for the steep shite to be covered so we can get out there and rip it to shreds?? Must be hurting the resorts cash flow i reckon.....

Anyway, back on topic, to me, on a basic level, this is a low full of lows, and each mini cell is dynamic and developing each hour, and with some luck, they will continue the trend of the last few days and intensify further, draw in moisture, and peak at just the right time for their full potential to be realised, which is significant i reckon........the crazy thing is, lows strengthen and weeken on their own accord, but if the atmoshere allows the pressure depressions to position themselves in the right places, ie low centred between NE Tas and our hills, with NE moving unstable cold air from trailing high rotation, and NW moving moisture feed spiraling out of the low being drawn from bass straight and south tasman, if the low is in the perfect position, we will have a COLD, MOIST NW feed at lowish pressure....................the perfect recipe for DUMPSVILLE BABY. AND THAT'S MY POINT!!!

The set up could potentially unfold that way for Sunday at least, followed by cold SW stream to hook Buller and BawBaw up. Weather is always based on potential, given ceratin air temp, moisture, pressure and system positions, and we finally have a system with that kinda "potential". Let the begin I say. Oh yeah, and weather is all about patterns, and the pattern for this system has been deeper complexity, and greater potential with consistent upgrades on all fronts- air temp, moisture, duration and accumulations........ Peace all.........live, love, ski (and board). ;D

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#1043260 - 30/07/10 12:30 am Re: Predictions: July 25 - August 2nd (2) [Re: snowblowa]
tbnext
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I like it but a bit wordy.Work makes me concentrate, the net is an escape \:\)

Im there Sat-Mon (Perisher). I need to decide which skis to cart on tube-carvers or mid fat, two pairs too hard.

Yeah yeah off topic.

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#1043332 - 30/07/10 08:58 am Re: Predictions: July 25 - August 2nd (2) [Re: tbnext]
toddler
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Full mountain riding by wednesday.Big snowfalls coming,roads will be jam packed with snow so take it easy.We dont need the roads shut down,we have waited two months for this.I reckon we could see a good 50+ and maybe some backyard rail jams in jindy IMO.Bring it on,its gunna be delicious.

Edited by Sandy (30/07/10 08:59 am)
Edit Reason: IMO added

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#1043337 - 30/07/10 09:05 am Re: Predictions: July 25 - August 2nd (2) [Re: toddler]
Snow Blowey
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agreed toddler. The southerly should see it snow around Jindy and Cooma.
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#1043339 - 30/07/10 09:06 am Re: Predictions: July 25 - August 2nd (2) [Re: Snow Blowey]
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I note the 5280 appearing on some charts this morning over the Alps...so 600-800m snow a possibility.
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#1043342 - 30/07/10 09:07 am Re: Predictions: July 25 - August 2nd (2) [Re: toddler]
afaict
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What I now like about this, is that GFS has moved in line with LAPS, with regards to the position the low will develop (basically in Bass Straight by the looks of things). This means it should strengthen nicely when it hits the Tasman on Monday.

Look the position of the developing low, then predict where its going to end up and strengthen in the next 24hours.

These charts are for 10pm Sunday night, already after a nice amount of snowfall.


LAPS


GFS


NO GAPS


We could be in for a suprise Monday.



Edited by afaict (30/07/10 09:50 am)

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#1043350 - 30/07/10 09:12 am Re: Predictions: July 25 - August 2nd (2) [Re: afaict]
DHS
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That chart is horny stuff. I think Monday will see similar totals to Sunday.
ie: 30cm+ each day IMO


Edited by Sandy (30/07/10 09:32 am)
Edit Reason: IMO added

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#1043373 - 30/07/10 09:48 am Re: Predictions: July 25 - August 2nd (2) [Re: DHS]
Donza
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Quantitative rainfall Perisher Valley
Today (9 am/3 pm) 1
Tonight (3 pm/9 am) 3
Saturday (24 h from 9 am) 2
Sunday (24 h from 9 am) 4
@800-900metres forecast..

I like those digits
Range 0 1 2 3 4 5 6
Precipitation (mm) <1 1-5 6-10 11-20 21-40 41-80 >80

This is all the NSW boms take

personally I think they might get a nice wee fall tonight at NSW... up high....
_________________________
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#1043390 - 30/07/10 09:59 am Re: Predictions: July 25 - August 2nd (2) [Re: Donza]
shaunstoddart
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This will go down as the one of the best falls in a long while IMO. I'm still calling 30+ for LM and Baw Baw by Monday. I'm gonna enjoy the blizzard on Sunday at LM, skiing is off so we booked again the following weekend. IMO Baw Baw and LM should have collected around 40cm by then.
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#1043398 - 30/07/10 10:05 am Re: Predictions: July 25 - August 2nd (2) [Re: shaunstoddart]
seekingpow
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The way this has built and built and built in the face of some pretty dire predictions, I reckon we could have some big surprises as mentioned. IMO
I'm very apprehensive to put a figure on it but if forecasters are saying a 30cm system for say Thredbo & Perisher, I would not be surprised to see 50cm by Tuesday.

This thing has built and built into a system with great potential in the past few days and seems to be surprising the seasoned forecasters. Only a week ago it was really looking like epic rain then a dust on dirt scenario.

Dynamic weather as Donza would say.


Edited by Sandy (30/07/10 10:16 am)
Edit Reason: IMO added

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#1043427 - 30/07/10 10:35 am Re: Predictions: July 25 - August 2nd (2) [Re: seekingpow]
afaict
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Ooooh i'm jiggling with excitement.

MIGHTE WEATHERZONES SNOW CAST!

Sat
Jul 31 Snowfalls lowering. Windy 95% 10-20cm 1400 Strong NW/W

Sun
Aug 01 Windy with snow. Chance blizzard 95% 20-40cm 900 Gale W/SW

Mon
Aug 02 Wind and snow easing 90% 10-20cm 1000 Strong S/SW

Tue
Aug 03 Wind with snow showers 70% 2-5cm 1200 Fresh SW/W

Wed
Aug 04 Windy with snow 80% 5-10cm 1000 Fresh S/SW

Thu
Aug 05 Light snow clearing then sunnier 50% 2-5cm 1100 Easing S/SW

Thats right!

6 Day snowfall - 40cm - 95cm (from WZ)


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#1043434 - 30/07/10 10:41 am Re: Predictions: July 25 - August 2nd (2) [Re: Donza]
FourSquare04
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 Originally Posted By: Donza
Quantitative rainfall Perisher Valley
Today (9 am/3 pm) 1
Tonight (3 pm/9 am) 3
Saturday (24 h from 9 am) 2
Sunday (24 h from 9 am) 4
@800-900metres forecast..

I like those digits
Range 0 1 2 3 4 5 6
Precipitation (mm) <1 1-5 6-10 11-20 21-40 41-80 >80

This is all the NSW boms take

personally I think they might get a nice wee fall tonight at NSW... up high....



IMO, I 'predict' that when the BOM come out with their 430 update this arvo, the B word will get a mention for Sunday, and possibly Monday....

afaict - could this be the first system that all models have agreed on this season? It sure is nice to see some agreement between them, a little bit of reassurance goes a long way!

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#1043482 - 30/07/10 11:31 am Re: Predictions: July 25 - August 2nd (2) [Re: FourSquare04]
Cuppa
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Jane's Weather Blog

 Quote:
The alpine areas are looking at another 10mm+ of rain, before at least 20 to 30 cm of snow with the first strong front and then 10 to 15 cm with the second (at the moment).

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#1043487 - 30/07/10 11:35 am Re: Predictions: July 25 - August 2nd (2) [Re: Cuppa]
Claude Cat Moderator
Gone Fishn'
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 Originally Posted By: Cuppa
Jane's Weather Blog

 Quote:
The alpine areas are looking at another 10mm+ of rain, before at least 20 to 30 cm of snow with the first strong front and then 10 to 15 cm with the second (at the moment).

I think that's a reasonable, conservative assessment from the charts I've looked at.
A few seem to be getting carried away and this only leads to disappointment later on.

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#1043502 - 30/07/10 11:53 am Re: Predictions: July 25 - August 2nd (2) [Re: Claude Cat]
Sandy Moderator
Dark Sith Lord & Gold Skigie 2006
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From the observations thread:

 Originally Posted By: Sandy
 Originally Posted By: Claude Cat
IR Satellite images show the two systems nicely (initial NW system, and low forming under SA).
http://realtime2.bsch.au.com/ir_sat.html?region=aus&loop=yes&images=4&allday=&start=&stop=#nav


What IS interesting is that jetstream cloud pushing down from the NW. (it's to the west of the NSW/QLD trough)

It's possible it could feed additional moisture into the system after it's turned colder.

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#1043506 - 30/07/10 11:57 am Re: Predictions: July 25 - August 2nd (2) [Re: Claude Cat]
snow-pixie
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 Originally Posted By: Claude Cat

A few seem to be getting carried away and this only leads to disappointment later on.


from this on the 24th

 Originally Posted By: skidown
IMO much much more than 5mm of rain

It's easy to ignore charts/snow levels/lines at 300 hours out!
It's easy to ignore charts/snow levels/lines at 180 hours out!

Not that easy to ignore at 120 hours out though, which is what we have now

If what is currently showing now (mostly rain) is still there at 48 hours out then the fat lady is starting to sing


to this today

 Originally Posted By: shaunstoddart
This will go down as the one of the best falls in a long while IMO. I'm still calling 30+ for LM and Baw Baw by Monday. I'm gonna enjoy the blizzard on Sunday at LM, skiing is off so we booked again the following weekend. IMO Baw Baw and LM should have collected around 40cm by then.


skiing in Oz....a dramatic manic depressive ride

IMO Claude's assessment is about where I see it...I'm thinking an overall gain of 45 cm at Spencers next Thursday with very little loss from the rain
_________________________
Thankyou I'm appearing nightly at Twin Towns RSL's beautiful Stardust Room for a limited season.

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#1043509 - 30/07/10 11:58 am Re: Predictions: July 25 - August 2nd (2) [Re: Sandy]
Claude Cat Moderator
Gone Fishn'
Part of the Furniture



confused Online
 Originally Posted By: Sandy
From the observations thread:

 Originally Posted By: Sandy
 Originally Posted By: Claude Cat
IR Satellite images show the two systems nicely (initial NW system, and low forming under SA).
http://realtime2.bsch.au.com/ir_sat.html?region=aus&loop=yes&images=4&allday=&start=&stop=#nav


What IS interesting is that jetstream cloud pushing down from the NW. (it's to the west of the NSW/QLD trough)

It's possible it could feed additional moisture into the system after it's turned colder.


Yes, I was thinking the same thing, although the NW moisture might be too far advanced and north to impact ...

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#1043701 - 30/07/10 02:48 pm Re: Predictions: July 25 - August 2nd (2) [Re: Claude Cat]
h2oskier
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The vic bom is optimistic about snow level for tomorrow IMO. Calling for 1400m
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