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Frontogenesis/Baroclinic zone induced snows


snowstormcanuck

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  On 2/8/2015 at 12:57 PM, blizzardof96 said:

HRDPS going nuts. Although it has some support from the UKM it will depend on further north banding and is a lower probability scenario.

attachicon.gifhrdps_qpf_toronto_29.png

 

Based on what I'm seeing across MI, that's too far north.

 

I'm going with 1-2" for the city today, less north more south.

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  On 2/8/2015 at 2:16 PM, snowstormcanuck said:

Based on what I'm seeing across MI, that's too far north.

 

I'm going with 1-2" for the city today, less north more south.

Agree.

 

As a side note, weird that YYZ is reported -FZDZ right now. -SN where I am and I'm only about a 20 minutes drive east of pearson.

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  On 2/8/2015 at 3:55 PM, snowstormcanuck said:

So Pearson still reporting -FZDZ but based on the MTO cams it looks like it's snowing in the city. 401 is getting coated.

 

It's actually pretty decent -SN. If the flake size were bigger I'd say these are SN rates, but since the flakes are so grainy the visibility isn't so bad.

 

Actually really shocked at the radar returns given what I'm seeing out my window.

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  On 2/8/2015 at 4:56 PM, blizzardof96 said:

Random pockets of -SN or -FZDZ across the GTA. Any banding is AOB 900mb/under the radar beam.

 

I have happened to stay all snow so far.

 

Yeah, maybe there's some lake input because 5dbz returns producing 1-1.5SM type snow is pretty unusual.

 

edit: flow is NE so it seems unlikely it's the lake. Hmmm...who cares. enjoy!

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  On 2/8/2015 at 6:08 PM, snowstormcanuck said:

Just talked to my mom. All -FZDZ, no snow in central Etobicoke. She said there's been no new snow accumulation since yesterday. lol, something doesn't add up here.

 

Based on the OBS I'm getting on twitter, there is a lot of randomness when it comes to P-type this morning due to the very thin/marginal warm layer in place. For example, Kingston has been reporting -FZDZ and -IP all morning. Milton, etobicoke and Donwtown TO have been reporting -ZR but my area has been all -SN.

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Have gotten -FZDZ since this morning in Hanover and its been constant. Its a strange type of precip. that I don't know I've seen. It's coating the windows on cars thin of grainy ice. Roads have a strange surface too, looks like white salt is spread everywhere finely.

 

  On 2/8/2015 at 5:01 PM, snowstormcanuck said:

Yeah, maybe there's some lake input because 5dbz returns producing 1-1.5SM type snow is pretty unusual.

 

edit: flow is NE so it seems unlikely it's the lake. Hmmm...who cares. enjoy!

 

Whatever it is, its very rare. Its -10ºC and freezing drizzle? I assumed once you go below -3ºC freezing liquid doesn't occur generally.

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  On 2/8/2015 at 6:13 PM, blizzardof96 said:

Based on the OBS I'm getting on twitter, there is a lot of randomness when it comes to P-type this morning due to the very thin/marginal warm layer in place. For example, Kingston has been reporting -FZDZ and -IP all morning. Milton, etobicoke and Donwtown TO have been reporting -ZR but my area has been all -SN.

Light snow in downtown Toronto at Bay and Bloor.

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  On 2/8/2015 at 6:16 PM, Torchageddon said:

Have gotten -FZDZ since this morning in Hanover and its been constant. Its a strange type of precip. that I don't know I've seen. It's coating the windows on cars thin of grainy ice. Roads have a strange surface too, looks like white salt is spread everywhere finely.

 

 

Whatever it is, its very rare. Its -10ºC and freezing drizzle? I assumed once you go below -3ºC freezing liquid doesn't occur generally.

 

Yeah, that's what I'm seeing on the MTO cams. It looks similar to snowcover but maybe it's not. In any case, we should be switching to snow everywhere soon as the cold air continues to deepen.

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