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Mesoscale Discussion 31
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   MESOSCALE DISCUSSION 0031
   NWS STORM PREDICTION CENTER NORMAN OK
   0108 PM CST SUN JAN 11 2015

   AREAS AFFECTED...ECNTRL IL THROUGH CNTRL IND AND WCNTRL OH

   CONCERNING...FREEZING RAIN 

   VALID 111908Z - 120015Z

   SUMMARY...WINTRY MIX OF LIGHT SLEET...FREEZING RAIN AND POSSIBLY
   SOME SNOW WILL TRANSITION TO FREEZING RAIN THIS AFTERNOON INTO THE
   EVENING.

   DISCUSSION...RECENT RADAR TRENDS SHOW PRECIPITATION DEVELOPING
   WITHIN AN E-W BAND OF ASCENT FROM CNTRL IL...IND INTO CNTRL OH. THE
   SUB-CLOUD LAYER IS DRY IN THIS REGION...AND PRECIPITATION WITHIN
   THIS INITIAL BAND WILL REMAIN VERY LIGHT AND INCLUDE A MIX OF
   SLEET...FREEZING RAIN AND POSSIBLY SOME SNOW. AS A SHORTWAVE TROUGH
   MOVES NEWD THROUGH THE LOWER MS VALLEY...PRECIPITATION WITHIN WARM
   CONVEYOR BELT WILL EXPAND INTO THE OH VALLEY...CONCURRENT WITH
   SUBSTANTIAL WARMING ABOVE THE SFC LAYER WHERE WET BULB TEMPERATURES
   SHOULD REMAIN AOB FREEZING. THIS SHOULD CONTRIBUTE TO A TRANSITION
   TO PREDOMINANTLY FREEZING RAIN DURING THE LATTER HALF OF THE
   AFTERNOON INTO THE EVENING WHERE RAINFALL RATES OCCASIONALLY UP TO
   .02 INCHES PER HOUR WILL BE POSSIBLE.

   ..DIAL.. 01/11/2015


   ATTN...WFO...CLE...ILN...IWX...IND...LOT...ILX...

   LAT...LON   40188888 40628654 40708280 39808294 39418440 39228612
               39298856 39658935 40188888 

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Page last modified: January 12, 2015
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