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January 13-15, 2023 | Winter Storm Potential


Penn State

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  • The title was changed to January 13-15, 2023 | Winter Storm Potential
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Beautiful storm on the Canadian.

Unfortunately ensembles all agree no matter what happens with this storm another big warm up ensues. Don't think a snowpack is going to materialize again this year.

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Bright side is the western drought getting drowned....

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5 minutes ago, Penn State said:

Just a comparison at hour 144 (UK / GFS / GDPS).. That's a pretty bowling ball. There's a lot to be determined, but I like the look. 

34307749_500MBComparison12z.gif.1a7236c0d92f412ff6fa000b305757a4.gif

So that ULL over the central US needs to open, phase in a possible nothern stream energy and then re-occlude all the while the track of the resultant surface mslp and it’s transfer /occlusion will be determined by multiple factors to the west to the east and to the north.  There’s so much to iron out yet.  We are evolving for better or worse.  I’d say 12z so far was a step in the better direction for now   
 

if the gmao exercise holds true 12z euro May struggle to produce a cold dynamic solution, but again it’s just an exercise 

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The mean is good but it’s still very much like bird shot 

no discernible strong spread to speak about.  Hence why I speak of of a wide envelope of solutions and much evolution to come, for better or worse 

0729D150-00CD-4729-8B07-E7D30A70B761.thumb.png.1950e25ff767953ae61df1af6c114582.png

Edited by Poco
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12z euro had a good mslp track 

the phases were sloppy.  If not mistaken I believe it actually tried phasing separate energies inside the longwave 3AAA3A72-FFD0-4CB5-AF04-D91AFB30B621.thumb.jpeg.d39ceb352405d868bbf3b3a42a635fb5.jpeg

So no real dynamics were able to consolidate and get going.   The backside energy being the most important to get the cold to spark it all kind of took a back seat.  

wouod be interested in seeing the control and sone other members from the probalistic suite to see if any were able to pull down more cold wrap it around and start the ccb and other dynamics 
 

 

 

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Don’t like the H flying east, like @so_whats_happening posted earlier, a 50/50 feeding cold air down would be the game changer. 
 

Edit: not down on this just keeping my expectations in check. Agree it’s a week out and complicated, models are spraying bird shots but should be walking up to the target in a few more days. Honestly I’d like to see big snow potential closer to the storm, not a bullseye 10 days out, never pans out. 
 

Thanks Poco for the long range dissects.

Edited by TLChip
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This threat is a week out, it’s a complicated phasing setup.  No single deterministic or probabilistic run is going to be a nail in the coffin right now.  It’s possibly a big storm setup.   This was always bound to evolve.  

also regarding the downstream flow and 5050, that’s still evolving too.  7EEB85FD-7A71-4C1D-8D3E-C8B2AC085E1A.thumb.png.7ce7c1c223c356943314cdc37606608a.png

last 8 run h5 delta 

 

A26AE933-F19B-44EF-90F8-3D674F48442C.thumb.png.7ee5132fed746f33d5cfc119cd6d85f3.png

gefs surface mean with spreads.  Do note the trend and spread in the 5050 area 

No need to get too attached to any single run or model right now.  It’s a marginal setup but has big potential.  We can leave it at that being a week out I’d hope 

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