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December 10-12th Clippers


Chicago Storm

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LOT regarding the main clipper Tue night/Wed morning...

 

THEN YET ANOTHER CLIPPER IS PROGGED TO TRAVERSE THE REGION LATE TUE
NGT/WED...WHICH HAS CONTINUED TO TREND FURTHER SOUTH AND STRONGER.
WITH THE SFC RIDGE DRIFTING SOUTH INTO THE TENN VALLEY...THIS WILL
LIKELY ALLOW THE WAVE TO PUSH ACROSS THE HEART OF THE CWFA. QPF OF
ARND 0.10" FOR THIS SECOND CLIPPER SNOW RATIOS WILL HOVER ARND 15:1
TO 20:1. THE BEST OMEGA/LIFT IS PUSHING INTO THE FAVORED DGZ WED
MORNING...WHICH COULD HELP PRODUCE LARGER DENDRITES AND INCREASE
SNOWFALL ACCUM RATES. AT THIS POINT HAVE ACCUMS GENERALLY BETWEEN
1-3"...AND COULD SEE A FEW LOCATIONS BETWEEN THE I-80 AND I-88
CORRIDOR COULD PICK UP CLOSE TO 4" BY LATE WED MORNING.  

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DVN

TUESDAY NIGHT AND WEDNESDAY...WITH HEIGHTS FALLING IN THE UPPER  

MIDWEST THE NEXT CLIPPER SYSTEM WILL BE TRACKING FARTHER TO THE  

SOUTH AND IS STRONGER THAN EARLIER MODEL RUNS DEPICTED. SURFACE LOW  

WILL BE MOVING FROM THE NORTHERN PLAINS TO SOUTHERN IA WHICH SHOULD  

LAY DOWN A BAND OF AT LEAST 1-3 INCH SNOW FROM THE I-80 CORRIDOR AND  

POINTS TO THE NORTH. CAN'T RULE OUT A NARROW BAND OF 4 OR 5 INCHES  

BUT HARD TO PIN DOWN THE EXACT LOCATION AT THIS POINT. AMOUNTS SOUTH  

OF THE INTERSTATE SHOULD BE LESS THAN AN INCH. THIS LOOKS TO BE  

ABOUT A 12 HOUR EVENT WITH ABOUT 6 HOURS OF MODERATE FORCING ALONG  

WITH A 200 MB DENDRITIC GROWTH ZONE DEPTH THAT SHOULD PRODUCE A  

PERIOD OF MODERATE SNOW. SIGNIFICANTLY LOWERING CONDENSATION  

PRESSURE DEFICITS WOULD SUGGEST THE SNOW TO BEGIN IN OUR NW COUNTIES  

EARLY TUESDAY EVENING WITH THE SNOW EXITING OUR EASTERN CWA LATER  

WEDNESDAY MORNING. MOISTURE IS LIMITED BUT THIS WILL BE ANOTHER  

ARCTIC FLUFF WITH ABOUT 20:1 TO 25:1 SNOW/WATER RATIO. WINDS  

INCREASE TO AROUND 20 MPH ON WEDNESDAY SO SOME DRIFTING IS POSSIBLE.

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