MESOSCALE DISCUSSION 2224
   NWS STORM PREDICTION CENTER NORMAN OK
   1151 AM CST SAT DEC 15 2007
   
   AREAS AFFECTED...MUCH OF OHIO...FAR SERN IN
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 151751Z - 152345Z
   
   MDT TO HEAVY SNOW WILL SPREAD FROM SERN IN/SWRN OH INTO CNTRL AND N
   CNTRL OH THROUGH 00Z. PORTIONS OF SRN OH AND SERN IN WILL CHANGE TO
   RAIN...WITH SOME AREAS NEAR THE TRANSITION ZONE RECEIVING PERIODS OF
   FREEZING RAIN.
   
   LARGE SHIELD OF WARM ADVECTION PRECIPITATION WILL PERSIST WITH HRLY
   LIQUID RATES AVERAGING 0.05 TO 0.20 IN/HR. SNOW WILL BE THE DOMINANT
   TYPE OVER N CNTRL OH...WHERE COOLER AIR EXISTS. TO THE S...LOW LEVEL
   JET/WARM CONVEYOR WILL CONTINUE TO INCREASE IN INTENSITY AND WILL
   RESULT IN WARMING TEMPERATURES ALOFT CENTERED NEAR 850 MB. THIS WILL
   RESULT IN A WARM LAYER ALOFT AND MELTING HYDROMETEORS. THUS...WHILE
   MDT TO HEAVY SNOWFALL RATES WILL OCCUR INITIALLY...A GRADUAL
   CHANGEOVER TO RAIN IS EXPECTED THROUGH 00Z. AREAS THAT MANAGE TO
   MAINTAIN LOCALLY SUB-FREEZING SURFACE TEMPERATURES NEAR THE
   CHANGEOVER ZONE COULD SEE PERIODS OF FREEZING RAIN.
   
   ..JEWELL.. 12/15/2007
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
   SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
   TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
   FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
   
   ATTN...WFO...PBZ...RLX...CLE...ILN...IWX...IND...
   
   40398481 41178281 41208176 40178204 39268240 38848343
   38958492 39228529 39468544 39868540