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Feb 12-14th V-Day Weekend Potential Stuff


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New Euro shows only about a tenth of precip for most of the DVN cwa after numerous runs of 0.15-0.20".  Models are just too aggressive in the 36+hr time frame this winter it seems.  Almost every time the models vastly reduce QPF in the final 30hrs.  It's been great the past 40 days or so, but the models have been jerking us around quite a bit.

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29 minutes ago, StormChaser4Life said:

Well this has trended to a real dry prune. How depressing. I have barely squeaked out anything from this cold active pattern. Cue Taps with the trumpet. 

I live in Farmington and we have about half the snow as even as close as Hanna City and Peoria proper.

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LOL

REA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE, IL  
946 AM CST FRI FEB 12 2021  
   
UPDATE  
  
946 AM CST  
  
CURRENTLY, AN ELONGATED 155 KT JET STREAK EXTENDS FROM CENTRAL   
MINNESOTA TO NORTHERN MICHIGAN, AS SAMPLED NICELY BY THE 12Z RAOBS   
FROM MPX/GRB/APX. IN THE RIGHT ENTRANCE REGION OF THE JET STREAK IS   
A SIMILARLY ELONGATED ZONE OF RADAR ECHOES STRETCHING FROM CENTRAL   
NEBRASKA THOUGH WEST-CENTRAL ILLINOIS. YET, CLOUD BASES NEAR 10,000   
FEET AND A DEARTH OF PRECIPITATION REPORTS FROM ASOS/AWOS OBSERVATION   
PLATFORMS SUGGEST MOSTLY VIRGA IS FALLING WITHIN THE LONG BAND OF   
RADAR ECHOES, EXCEPT ACROSS NEBRASKA AND VERY FAR SOUTHWESTERN  
IOWA WHERE LIGHT SNOW IS MAKING IT TO THE GROUND.  
  
COMPARED TO 24 HOURS AGO, THE INCOMING SUITE OF HIGH RESOLUTION   
MODEL GUIDANCE HAS BACKED OFF CONSIDERABLY ON LIQUID-EQUIVALENT   
PRECIPITATION AMOUNTS THROUGH SATURDAY EVENING. THE CULPRIT IS A   
PREVIOUSLY UNADVERTISED WEDGE OF DRY LOW-LEVEL AIR CENTERED AROUND  
850 MB / 5000 FEET, WHICH IS CHEWING UP THE SNOW THAT IS   
DEVELOPING FROM THE DECIDEDLY UPPER-LEVEL LIFT.
AS A RESULT, THE   
ONSET OF SNOW TODAY AND OVERALL SNOW TOTALS WILL TAKE LONGER AND   
BE LOWER THAN WE ORIGINALLY THOUGHT, RESPECTIVELY. USING THE RAP   
850 MB RELATIVE HUMIDITY AS A PROXY TO TRACK THE ELIMINATION OF   
THE DRY LAYER, IT APPEARS LIGHT SNOW SHOULD START TRICKLING DOWN   
TO THE GROUND AFTER DARK AND IN THE 9-11 PM WINDOW. BY THAT POINT,  
A DEEP SNOWFLAKE GROWTH LAYER OF NEARLY 15,000 FEET WILL STILL   
AFFORD FLUFFY SNOW RATIOS OF 20:1 TO 25:1, WITH GRADUAL LIFT   
SUPPORTING A SNOW RATE OF 0.1 TO 0.3"/HR THROUGH DAYBREAK   
SATURDAY. UPPER- LEVEL LIFT WILL THEN WANE WITH TIME AS THE UPPER-  
LEVEL JET STREAK SCOOTS EASTWARD, THOUGH LIGHT SNOW SHOWERS WILL   
LIKELY PERSIST THROUGH MUCH OF SATURDAY.  
  
OVERALL, THE REDUCTION IN SNOW TOTALS BY THE MIDNIGHT SHIFT WAS A   
GOOD MOVE, AND GENERALLY 1 TO 4" (HIGHER AMOUNTS MORE LOCALIZED  
THAN NOT) LOOKS ON TRACK. SHOULD THE DRY LAYER ERODE FASTER THAN   
CURRENTLY EXPECTED, AT LEAST SOME CONSIDERATION WILL BE GIVEN TO A  
SHORT LEAD-TIME WINTER WEATHER ADVISORY. AT THIS POINT HOWEVER   
OUR MESSAGING APPEARS QUITE APPROPRIATE FOR A LONG-DURATION LIGHT   
SNOWFALL EVENT. UPDATED PRODUCTS WILL BE SENT SHORTLY.   
  
BORCHARDT  
  

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6 minutes ago, Baum said:

 excellent under the hood discussion by the LOT forecaster. Even baked in the possibility of an over performance.

I wouldn't be surprised if some of you who have continuously gotten snow this week do okay. I'm hoping for an inch. Have yet to see an inch from a single event this week, so it might be a fool's errand. Regardless, it's nice to have snow on the ground and I'm trying to just come to peace with the fact that that's as good as it's going to get this winter. 

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