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Dec 9-10 storm threat


ORH_wxman

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While there is still a decent amount of model spread and that is to be expected 120 hours out, the ensemble support for some type of storm nearby has increased quite a bit today.

The storm was originally about 24 hours earlier on guidance but has since developed later. This is actually crucial because the later amplification of the trough allows a potent high to our northeast to slide east a bit. This makes it tougher to hold in the cold airmass, especially along the coast. But this could still change a bit.

The areas most favored for snow would be the interior hills, especially CNE and NNE.

But given the timeframe, obviously a lot can still change and likely will.

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While there is still a decent amount of model spread and that is to be expected 120 hours out, the ensemble support for some type of storm nearby has increased quite a bit today.

The storm was originally about 24 hours earlier on guidance but has since developed later. This is actually crucial because the later amplification of the torch allows a potent high to our northeast to slide east a bit. This makes it tougher to hold in the cold airmass, especially along the coast. But this could still change a bit.

The areas most favored for snow would be the interior hills, especially CNE and NNE.

But given the timeframe, obviously a lot can still change and likely will.

someone in the NYC subforum put up a snow map already. that said, this setup with HP sliding east over maine is basically like you said an inner NE/NNE storm. getting the easterly flow from the escaping HP spells more liquid than rain down in SNE/NYC area.

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someone in the NYC subforum put up a snow map already. that said, this setup with HP sliding east over maine is basically like you said an inner NE/NNE storm. getting the easterly flow from the escaping HP spells more liquid than rain down in SNE/NYC area.

:facepalm: Let me guess, his/her BY jackpots?

 

Anyway, interesting setup for NNE/interior SNE for sure, but several ways that most/all of us can get in on at least some of the fun(Quicker timing, strong wraparound snows, colder profile overall, etc.). Considering the magnitude of the changes we'd need to see to make it more interesting for many(Not much), the spread we have in modeling(A good amount), and the lead time(A good amount), I'd be keeping a corner of an eye on this no matter where you live if you're looking to see some flakes. 

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That's some real nice cold coming in Sunday. 

 

 

The Sunday night timing would have been primo vs Monday afternoon/evening.

 

Still, we have to watch...even on highs going from CAR ENE to Nova Scotia, you can get a pretty nice wedge that is underplayed on model guidance...esp with a nice fresh arctic airmass like that one.

 

You can sort of see how if the northern energy cedes more power to the southern stream, the high would probably be better anchored in...on the Euro, it still has a decent wedge inland, but you can see how the low up near James Bay is being a bit of a turd in the punch bowl for the coast...weaken that thing a bit and the high would probably be a little better oriented.

 

f120.gif

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The Sunday night timing would have been primo vs Monday afternoon/evening.

 

Still, we have to watch...even on highs going from CAR ENE to Nova Scotia, you can get a pretty nice wedge that is underplayed on model guidance...esp with a nice fresh arctic airmass like that one.

 

You can sort of see how if the northern energy cedes more power to the southern stream, the high would probably be better anchored in...on the Euro, it still has a decent wedge inland, but you can see how the low up near James Bay is being a bit of a turd in the punch bowl for the coast...weaken that thing a bit and the high would probably be a little better oriented.

 

f120.gif

you have some of the best jokes in here ORH. this storm is more promising than the last and makes you think what it would be like if we had a notable -NAO

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The Sunday night timing would have been primo vs Monday afternoon/evening.

 

Still, we have to watch...even on highs going from CAR ENE to Nova Scotia, you can get a pretty nice wedge that is underplayed on model guidance...esp with a nice fresh arctic airmass like that one.

 

You can sort of see how if the northern energy cedes more power to the southern stream, the high would probably be better anchored in...on the Euro, it still has a decent wedge inland, but you can see how the low up near James Bay is being a bit of a turd in the punch bowl for the coast...weaken that thing a bit and the high would probably be a little better oriented.

 

 

Yf120.gif

 

That nrn stream low also provides WAA aloft to warm those temps as well. Fighting a couple of things here on the CP and esp south of I-90. 

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