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Mesoscale Discussion 1617
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   MESOSCALE DISCUSSION 1617
   NWS STORM PREDICTION CENTER NORMAN OK
   0530 PM CDT MON AUG 25 2014

   AREAS AFFECTED...IL/INDIANA

   CONCERNING...SEVERE THUNDERSTORM WATCH 476...

   VALID 252230Z - 252330Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 476
   CONTINUES.

   SUMMARY...ISOLATED LARGE HAIL AND GUSTY WINDS REMAIN POSSIBLE WITH
   CONVECTION ACROSS WW476.

   DISCUSSION...DISORGANIZED MCS HAS EVOLVED OVER NRN IL/INDIANA WITH
   GENERAL MOVEMENT NOW SEWD AT ROUGHLY 20-25KT.  OUTFLOW HAS SURGED
   ABOUT 10 MI AHEAD OF LEADING EDGE OF CONVECTION AND GUSTY WINDS ARE
   POSSIBLE WITH THIS WIND SHIFT.  ADDITIONALLY...WDSSII ALGORITHM
   SUGGESTS LARGE HAIL IS OCCURRING WITH THE STRONGEST UPDRAFTS OVER
   TIPPECANOE COUNTY INDIANA AND LIVINGSTON/MARSHALL COUNTIES IN IL. 
   ACTIVITY SHOULD APPROACH THE SRN PORTION OF WW AROUND 26/00Z.

   ..DARROW.. 08/25/2014


   ATTN...WFO...IWX...IND...LOT...ILX...DVN...

   LAT...LON   40888966 42238892 40738546 39428617 40888966 

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