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December 9-11th, 2022 | Wintry weather potential


MaineJay

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Really been a nice look to the wave train in east Asia as well.  See ample correlative north Atlantic ridging becoming involved.  The period coming up isn’t something I necessarily want (I’m old and winter just isn’t quite for me as much anymore) but I’ll for sure be watching the evolution.  Cheers to everyone.  Hope you had and will have a happy holidays. 

Edited by Poco
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GYX

Most of the available operational models and ensemble solutions
suggest that Canadian high pressure should bring some drier air
down to end out the work week. Thereafter, there is very little
in the way of ensemble consensus in regards to a system
tracking across the Mid Atlantic region and potentially
intensifying somewhere off the coast. Therefore, confidence
levels for next weekend remains low.

&&

 

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Had a feeling this one would hold. High up north is in a great place to provide enough of a cold wedge to probably about northern VA. Decent WAA push of precip looks like this will potentially be the taste of the pattern to come.

This would be perfect to get snow falling the day before we have santa stumble downtown.

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Decent signal on EFI for this far out. May need to wait a day or so before it starts to pick up something snowy along the East Coast. The black contour over the Midwest for snow means that 10% of the EPS is forecasting a climatologically extreme event. The higher that number goes, the more extreme. 

 

ens_2022120500_conus_24h_tpi_SFC_96.png.2037ea2696a8b3a49bbf09a4385c6117.png

ens_2022120500_conus_24h_sfi_SFC_96.png.4345614b2d96566cfd59d5b6eb2de1c0.png

ens_2022120500_conus_24h_tpi_SFC_120.png.71bbbe24c2e3ff4ef7dc3044a697061d.png

 

ens_2022120500_conus_24h_sfi_SFC_120.png.8a09ec4ce99b9ab415ba6f6df23436dc.png

 

 

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There appears to be a casual relationship between the speed of the wave, and it's strength. The slower waves are weaker.

This is less than 5 days out, yet there's a 600 mile difference between the slow UKie and fast GFS.

 The GFS also always most out-of-sync with the northern stream, retreating all energy northward, where the other models have a little closed low breaking off, and briefly meandering north of the crown of Maine..

   Man, 5 days out in the modeling world feels like an eternity right now.

  The LR NAM, appeared to be even more bullish on that little closed low, providing a better cold source, but again LR NAM caveats apply.

  The storm still wants to exit the coastal region on a NW-SE trajectory, but still so much uncertainty in timing, and how much (if any) cold can be tapped, that it is difficult to know if we do get good cold-QPF overlap, and where.    I am sticking with the elevated areas from the Poconos to northern VA as having the best shot.  I'm not really looking closely at the follow up waves which are even more varied.

2003096322_500h_anom.conus(5).png.35ec841c42d8672757642715b88f402e.png

1778173731_500h_anom.conus(6).png.7302a4d60b9655bd39c7e2c83209389a.png

1339337541_500h_anom.conus(3).png.b78ae0eec720ab2a8dcb958106bc0bfb.png

1784993921_500h_anom.conus(4).png.07ebf5aabaa12d34958d85e37d9becfe.png

 

 

 

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1 hour ago, JDClapper said:

Wpc overnight update. 0z EPS running away from the late week one. 10%ish chance of white in interior PA. (Was around 30% give or take for a few runs prior)

 

Screenshot_20221205-062836_Chrome.jpg

Exactly what I was hoping would NOT happen. But expected.

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2 hours ago, HVSNOWSTORM said:

12z gfs just hangs the low off NJ for over a day once it finally transfers, with mainly cold rain and some interior/ elevation snows....

 

sn10_acc.us_ne (11).png

Euro a minor C-3 event for NW PA, CPA.. kinda fizzling out as it approaches. 🤷‍♂️

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1 hour ago, JDClapper said:

Euro a minor C-3 event for NW PA, CPA.. kinda fizzling out as it approaches. 🤷‍♂️

Yea it's starting to look like the first legit threat for widespread frozen will be Tues- Wed 13th, both on cmc and euro.

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9 hours ago, JDClapper said:

Wpc overnight update. 0z EPS running away from the late week one. 10%ish chance of white in interior PA. (Was around 30% give or take for a few runs prior)

 

Screenshot_20221205-062836_Chrome.jpg

First dark greens showing up! Haha

12z eps looks like 20%ish chance of measureable white in CPA. Improved chances from 0z, but amounts are light (Under 2" for pretty much every member)

 

Screenshot_20221205-153846_Chrome.jpg

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34 minutes ago, JDClapper said:

First dark greens showing up! Haha

12z eps looks like 20%ish chance of measureable white in CPA. Improved chances from 0z, but amounts are light (Under 2" for pretty much every member)

 

Screenshot_20221205-153846_Chrome.jpg

@JDClapper can you make these maps any bigger when you post? I can't see them. I need them to be 20" x 60"

thank you kindly 

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1 hour ago, Bradjl2009 said:

Yeah it's looking like the chance of Friday night's event being anything more than wet snow in a few spots is not very good right now. Oh well, I'd rather get drizzle than yet another rainstorm.

Yep, this one is fizzling out. Guess I will go back to watching the battle between Cold/warm December posts in the LR thread. 😄

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