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Mesoscale Discussion 2100
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   MESOSCALE DISCUSSION 2100
   NWS STORM PREDICTION CENTER NORMAN OK
   1253 PM CST SAT DEC 21 2013

   AREAS AFFECTED...FAR NERN OK...ERN KS...WRN/CNTRL/NERN MO...W-CNTRL
   IL

   CONCERNING...FREEZING RAIN 

   VALID 211853Z - 212300Z

   SUMMARY...FREEZING RAIN RATES LOCALLY IN EXCESS OF 0.10 IN/HR ARE
   LIKELY THIS AFTERNOON INTO THE EVENING FROM FAR NERN OK/ERN KS NEWD
   INTO NERN MO AND W-CNTRL IL.

   DISCUSSION...SEVERAL UPPER VORT LOBES ARE BEGINNING TO CONSOLIDATE
   OVER THE SRN HIGH PLAINS THIS AFTERNOON. AS THIS OCCURS...850 MB
   CYCLONE WILL DEEPEN SLIGHTLY AS IT ENTERS ERN KS/WRN MO BY EVENING.
   WAA/ISENTROPIC UPGLIDE WILL INTENSIFY AS A RESULT...AND SUSTAIN
   MODERATE RAINFALL RATES FROM FAR NERN OK/ERN KS INTO CNTRL/NERN MO
   AND W-CNTRL IL. SURFACE TEMPERATURES ARE EXPECTED TO GENERALLY HOLD
   STEADY IN THE MID/UPPER 20S DUE TO WET-BULB COOLING EFFECTS...WHICH
   WILL PROMOTE FREEZING RAIN GIVEN THE PRESENCE OF A 1-3 DEG C WARM
   LAYER CENTERED NEAR 850 MB. FREEZING RAIN WILL EVENTUALLY TRANSITION
   TO SNOW OVER ERN KS THIS EVENING...BUT WILL PERSIST OVER MO/IL AS
   WARM NOSE PERSISTS AHEAD OF 850 MB LOW.

   ..GARNER.. 12/21/2013


   ATTN...WFO...ILX...LSX...DVN...SGF...EAX...TSA...TOP...ICT...

   LAT...LON   40769097 40468964 39718972 38949058 36579519 37049661
               38059606 39349425 40769097 

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