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Southern Ontario Winter '13/'14 Discussion


harrisale

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I'm guessing either a WSW or a snowfall warning along and north of a Sarnia-Waterloo-Peterborough line.

Hopefully they'll do it in time for the 3:30 forecast update.

And here's this from Natasha Ramsahai at CityNews:

https://twitter.com/CityNatasha/status/429332144000094208

As you said earlier, this will likely come down to nowcasting.

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I'm guessing either a WSW or a snowfall warning along and north of a Sarnia-Waterloo-Peterborough line.

18z NAM going big along and north of the 401. Could see some very impressive rates wherever precip stays as all snow. Yet to look over forecast soundings, but suspect the 850mb layer isn't the warmest point.

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Hopefully they'll do it in time for the 3:30 forecast update.

And here's this from Natasha Ramsahai at CityNews:

https://twitter.com/CityNatasha/status/429332144000094208

As you said earlier, this will likely come down to nowcasting.

 

Hope that's not the same model that was forecasting the LES storm last week. :yikes:

 

I think I'm going to bump my call for most of Toronto to 4-6". Snowstorms and OB could go 6"+. Final call.

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18z NAM going big along and north of the 401. Could see some very impressive rates wherever precip stays as all snow. Yet to look over forecast soundings, but suspect the 850mb layer isn't the warmest point.

 

Haven't seen them either but I'll hazard a guess that the ugly +3c nose of warmth at 800mb has cooled off a bit or's been delayed.

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Temperature now up to 0.1C at YYZ. -_- 

 

You can never win living in the GTA. 

 

Amazing how easily some forget that a year ago we witnessed one of the biggest snowfalls since WWII... but I guess we 'never' win.

 

I'm going to go with 12cm IMBY. Any more than that I'll consider this system a big win. Real fun gets going next week.

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Hope that's not the same model that was forecasting the LES storm last week. :yikes:

I think I'm going to bump my call for most of Toronto to 4-6". Snowstorms and OB could go 6"+. Final call.

I hope not. She showed another in-house model run this morning which gives 11 cm of snow and 10 mm of rain for Toronto.

That's a good call for Toronto. More like 10-12 cm downtown/lakeshore and 12-15 cm midtown/hwy. 401.

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Amazing how easily some forget that a year ago we witnessed one of the biggest snowfalls since WWII... but I guess we 'never' win.

 

I'm going to go with 12cm IMBY. Any more than that I'll consider this system a big win. Real fun gets going next week.

 

I don't have high expectations with next week's system. Seems to be too south for us to really collect the goods. Amounts seem similar to this system.

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Haven't seen them either but I'll hazard a guess that the ugly +3c nose of warmth at 800mb has cooled off a bit or's been delayed.

Your right. Sounding looks below zero for the entirety of the event along and north of the 401. 800-1000mb layer hugging the 0c mark as close as you can get. Heavy rates helping... but a 50km shift SE would be nice.

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Happy you guys are going to finally get a decent hit with this one. Hoping the Feb 4-5 storm gives us a decent hit.

 

 

Rain will possibly eat away at most of the accumulations sadly. Still waiting for a lasting widespread synoptic 6"+ dump that we've yet to really see this winter.

 

No one is going to see north of 7" with this system even if we get really lucky.

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I don't have high expectations with next week's system. Seems to be too south for us to really collect the goods. Amounts seem similar to this system.

No offense but this is the reason I despise some of your posts. That storm is still a week out and consistency is far from reach yet your already punting it?

One thing is clear, that storm will have much more moisture to work with than tomorrows event.

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SEVERE WEATHER BULLETIN
ISSUED BY ENVIRONMENT CANADA

AT 3:15 PM EST FRIDAY 31 JANUARY 2014.
---------------------------------------------------------------------

WATCHES/WARNINGS IN EFFECT FOR SOUTHERN ONTARIO...
 

SNOWFALL WARNING FOR:
=NEW= CALEDON
=NEW= NEWMARKET - GEORGINA - NORTHERN YORK REGION
=NEW= UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION
=NEW= HURON - PERTH
=NEW= WATERLOO - WELLINGTON
=NEW= DUFFERIN - INNISFIL
=NEW= GREY - BRUCE
=NEW= BARRIE - ORILLIA - MIDLAND
=NEW= PETERBOROUGH - KAWARTHA LAKES
=NEW= STIRLING - TWEED - SOUTH FRONTENAC
=NEW= BANCROFT - BON ECHO PARK
=NEW= BROCKVILLE - LEEDS AND GRENVILLE
=NEW= CITY OF OTTAWA
=NEW= GATINEAU
=NEW= PRESCOTT AND RUSSELL
=NEW= CORNWALL - MORRISBURG
=NEW= SMITHS FALLS - LANARK - SHARBOT LAKE
=NEW= PARRY SOUND - MUSKOKA
=NEW= HALIBURTON
=NEW= RENFREW - PEMBROKE - BARRY'S BAY.

      15 CENTIMETRES OF SNOW ON SATURDAY.

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No offense but this is the reason I despise some of your posts. That storm is still a week out and consistency is far from reach yet your already punting it?

One thing is clear, that storm will have much more moisture to work with than tomorrows event.

 

Strong choice of words. 

 

Please let me know where I'm off? No indications whatsoever that say that storm will have significantly more than tomorrow's system for us. Weird to despise honesty. I'd rather be realistic than post about how some frozen lakes and a snow pack are going to completely alter the state of atmospheric thermals.

 

If you'd rather I said that I'm excited about the significant amount of snow I will get next week, even though not a single model shows it, then I can.

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12z Euro for YYZ

 

2 M     850     SFC     SFC     700    6 HR     500    1000 

                 TMP     TMP     PRS     RHU     RHU     QPF     HGT     500 

                 ©     ©    (MB)    (PCT)   (PCT)   (IN)    (DM)     THK 

SAT 12Z 01-FEB  -7.0    -5.7    1023      93      90    0.00     551     533    

SAT 18Z 01-FEB  -2.0    -3.8    1018      89     100    0.09     552     538    

SUN 00Z 02-FEB  -0.3    -2.7    1012      97      98    0.28     552     542    

SUN 06Z 02-FEB   0.3    -2.3    1012      98      96    0.18     549     540    

SUN 12Z 02-FEB  -2.7    -5.0    1016      89      68    0.08     546     534    

SUN 18Z 02-FEB  -2.0    -6.9    1019      71      32    0.01     544     530 

 

 

 

Sharp cutoff. It came in a bit SE. We just need another slight SE shift....come on! :(

 

We'll lose daytime heating long before temperatures are expected to go above freezing. Thats another key point! 

Think you may have the wrong airport code. Here is the euro text data for YYZ via accupro. Considerably cooler...

ECMWF Deterministic FORECAST FOR: YYZ    LAT=  43.67 LON=  -79.63 ELE=   568

                                            12Z JAN31

                 2 M     850     SFC     SFC     700    6 HR     500    1000 

                 TMP     TMP     PRS     RHU     RHU     QPF     HGT     500 

                 ©     ©    (MB)    (PCT)   (PCT)   (IN)    (DM)     THK 

SAT 12Z 01-FEB  -9.0    -6.7    1023      88      79    0.00     549     531    

SAT 18Z 01-FEB  -3.5    -5.2    1018      93      99    0.08     550     536    

SUN 00Z 02-FEB  -1.8    -3.7    1012      98      97    0.30     550     540    

SUN 06Z 02-FEB  -1.3    -3.9    1012      97      98    0.13     547     538    

SUN 12Z 02-FEB  -4.3    -5.5    1016      87      48    0.03     544     531    

SUN 18Z 02-FEB  -2.7    -7.5    1018      70      30    0.00     542     527

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Environment Canada is calling for snow on Wednesday for all of southern Ontario. Usually they put a 60 or 70 percent chance at this time range, but for them to put just snow in the public forecast is a sign they're confident that it'll happen.

 

Snow seems like a lock next week, it really comes down to amounts. Right now anywhere in the 10-15cm range seems about right. Upper amounts of 20cm if it tracks north.

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Think you may have the wrong airport code. Here is the euro text data for YYZ via accupro. Considerably cooler...

ECMWF Deterministic FORECAST FOR: YYZ    LAT=  43.67 LON=  -79.63 ELE=   568

                                            12Z JAN31

                 2 M     850     SFC     SFC     700    6 HR     500    1000 

                 TMP     TMP     PRS     RHU     RHU     QPF     HGT     500 

                 ©     ©    (MB)    (PCT)   (PCT)   (IN)    (DM)     THK 

SAT 12Z 01-FEB  -9.0    -6.7    1023      88      79    0.00     549     531    

SAT 18Z 01-FEB  -3.5    -5.2    1018      93      99    0.08     550     536    

SUN 00Z 02-FEB  -1.8    -3.7    1012      98      97    0.30     550     540    

SUN 06Z 02-FEB  -1.3    -3.9    1012      97      98    0.13     547     538    

SUN 12Z 02-FEB  -4.3    -5.5    1016      87      48    0.03     544     531    

SUN 18Z 02-FEB  -2.7    -7.5    1018      70      30    0.00     542     527

 

Solid 6" there; but then again, it's the Euro... (never thought I'd say that!)

 

Somewhere between the Canadian and the Euro lies the answer...

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Environment Canada is calling for snow on Wednesday for all of southern Ontario. Usually they put a 60 or 70 percent chance at this time range, but for them to put just snow in the public forecast is a sign they're confident that it'll happen.

 

That whole 60/70% stuff is new though. For the longest time they'd go categorical in the extended range.

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Next weeks storm will have double the moisture than this system. Track will depend on how much YYZ receives.

 

Right, but the main track has been consistently south of our region. This thing was initially forecast to pummel northern Georgia and the Carolinas. It's now looking more realistic, but still south.

 

Nobody is punting, Snowstorms is just being (characteristically) dramatic; however, anyone anticipating 20cm+ is probably kidding themselves at this stage.

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Snow seems like a lock next week, it really comes down to amounts. Right now anywhere in the 10-15cm range seems about right. Upper amounts of 20cm if it tracks north.

That's a good guess at this point. Some of the dates that the GFS CIPS analog system gave out last night for this system gave 10-15 of snow. They include Jan 31/82, Feb 3/82 and Feb 16/93. I remember the last date very well. A few days later on Feb 21-22, 1993, another 15-25 cm fell in Toronto. Could history repeat itself next week with a potential storm around the Feb 8-10 mark?

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