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December 21-22nd Winter Storm Part 3


Chicago Storm

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Sparks could fly in here tonight. Would love to see a super juices se run out of the nam tonight

 

 

This thing is locked and loaded, the NAM may (should) trend se to match up with the GFS but everything looks to be unfolding as expected.

 

EDIT: the QPF number on my final call is going to bust way high

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Stuck at the airport and can't see jack with this blackberry. Can one on the Toronto members give me an update on the 18z suite?

 

It showed about 1.25 to 1.50 qpf in terms of ice. It still had the core of the precip just south of the GTA, however, it was still pretty messy. Looked the same as previous runs.  I think its time to invest in another phone SSC, haha. 

 

Finally back in Toronto? 

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Point forecast currently is 4-9" total through Sunday night.

Sleet and Snow Saturday night and then all snow after 12am.

Ditto.

South 'burbs had their dumping last weekend.

Had a glaze on untreated surfaces last night, this morning and again this evening. Snowpack stuck around and has that glazed shine now in the headlights. Icicles intact on the roof. We're about as ready as we can get for a run at the high mark at least in N. IL.

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Stuck at the airport and can't see jack with this blackberry. Can one on the Toronto members give me an update on the 18z suite?

18z GFS shifted SE slightly and is showing a storm with predominantly PL for the GTA, with maybe some ZR mixed in late. The RGEM trended wetter and is showing widespread 40-50mm of ZR through the city of Toronto, with 50-60mm down towards guelph, milton, brantford Etc. GGEM has 30-40mm of ZR, with some PL mixed in north of the 401. NAM did come in cooler, but not yet there with the consensus. Shows about 10-20mm of ZR with highest accums as you get towards and north of the 401.

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I haven't spent too much time looking at the Toronto ice threat, but after looking at a few soundings it's definitely looking pretty scary. 

 

This one's from 06z tomorrow night near Toronto.  Looks like a classic freezing rain sounding.  Fairly deep warm layer above a shallow, but effectively cold surface layer. 

NAM_218_2013122018_F36_43.5000N_80.0000W

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In the lolly of 50-75mm between Toronto and London is the 401 Hwy. Running in this sector is a huge power line supplying hydro to Windsor and SW Ontario. I remember the lines in Quebec coming down many years ago from the weight. Please let the maps be wrong.

worst case scenario. 60mm can destroy transmission lines.

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I see multiple 37s and a 38 right near me.  I'm not saying it's 38 but it's quite warm. The point being stebo's "no way" chicago sees rain call was premature.

I was wrong about Chicago getting rain. Like I said you are going to thoroughly enjoy your 35 and cold rain.

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In the lolly of 50-75mm between Toronto and London is the 401 Hwy. Running in this sector is a huge power line supplying hydro to Windsor and SW Ontario. I remember the lines in Quebec coming down many years ago from the weight. Please let the maps be wrong.

 

Overhead power lines (the big structures) can handle 40-50mm of ice accretion. 15mm of ice accretion can snap power lines.

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