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Pre-Christmas Winter Storm Potential


Chicago Storm

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haha

 

I keep getting you and thundersnow mixed with those avs

 

Ha, funny thing is he was on the other side of the tornado in my av with a completely different (better) perspective of it. 

 

12z GFS ensembles have started rolling out.  Quite a bit of variation, which is to be extended beyond 120hrs.  Some members look very similar to the op, but really don't see any amped up too crazy.

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in regards to speed....at least for the SW trough....not the LP itself later on

 

 

MODEL DIAGNOSTIC DISCUSSION 
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 
1150 AM EST MON DEC 16 2013 
 
  
..TROF AFFECTING THE WESTERN U.S. ON WEDNESDAY/THURSDAY 
  
 
PRELIMINARY PREFERENCE: BLEND OF THE 12Z GFS/00Z ECMWF 
FORECAST CONFIDENCE: AVERAGE 
 
TOWARD THE END OF THE SHORT RANGE PERIOD WHICH CONCLUDES THURSDAY 
EVENING...MODELS ARE IN AGREEMENT THAT A DEEP UPPER TROF WILL 
SETTLE OVER THE SOUTHWESTERN U.S. ON THURSDAY. THE GUIDANCE DIFFER 
BUT THE SPREAD IS REASONABLE FOR AN 84 HOUR FORECAST. ON THE 
FASTER SIDE OF THE EQUATION IS THE 00Z UKMET WITH THE 00Z CMC 
SOMEWHAT FAVORING THIS SOLUTION. MEANWHILE...THE SLOWEST AVAILABLE 
SOLUTIONS ARE THE 12Z GFS/00Z ECMWF WHICH IS SUPPORTED BY THE 06Z 
GEFS MEAN. THE MULTI-DAY SPAGHETTI TRENDS AT 564 DM SUGGEST A 
WESTWARD/SLOWER SOLUTION IN TIME. IT SEEMS LIKE THE GUIDANCE 
ALWAYS TRY TO ACCELERATE SUCH SYSTEMS TOO FAR TO THE EAST WITH 
SLOWER MODELS TENDING TO VERIFY BETTER
.

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ice ice baby

 

ZR_000-240_0000.gif

 

 

Interesting map there.  You can see how it picks up on a relative minimum on the west side of Lake Michigan, probably due to onshore flow.  But with the cold pattern as of late and the lake being relatively cold, it would be interesting to see how it would factor into things. 

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Disastrous. Especially right before Christmas. I'd give it about a 0.5% of verifying though.

Such a nice storm, but lack of cold air, figures...Thankfully we are still days out, and anything can happen. However seriously that's the last thing we want in S/E Michigan, that much frzr would be terrible.. 

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