MESOSCALE DISCUSSION 1098
   NWS STORM PREDICTION CENTER NORMAN OK
   0108 AM CDT SUN JUN 21 2015

   AREAS AFFECTED...CENTRAL INDIANA AND EXTREME WESTERN-SOUTHWEST OH

   CONCERNING...SEVERE THUNDERSTORM WATCH 321...

   VALID 210608Z - 210715Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 321
   CONTINUES.

   SUMMARY...LOCALLY STRONG TO SEVERE WIND GUSTS REMAIN POSSIBLE ACROSS
   CENTRAL PORTIONS OF INDIANA AS A LINE OF STORMS ADVANCES TO THE ESE
   TOWARD SOUTHEAST INDIANA AND EXTREME SWRN OH THROUGH 08Z.  NEW STORM
   DEVELOPMENT SHOULD CONTINUE TO OCCUR ON THE SOUTHERN FLANK...THOUGH
   OVERALL SEVERE WEATHER THREAT SHOULD DIMINISH BEYOND 07Z.

   DISCUSSION...RECENT TRENDS IN MOSAIC RADAR IMAGERY INDICATED SOME
   DECELERATION OF THE LINE OF STORMS MOVING THROUGH CENTRAL
   IND...THOUGH A FORWARD SPEED AT 35-40 KT CAN STILL PRODUCE LOCALLY
   STRONG/DAMAGING WIND GUSTS.  IN ADDITION TO THE DECELERATION IN
   FORWARD SPEED...IR IMAGERY SHOWED GRADUAL WARMING CLOUD TOPS WITH
   THIS MCS ACROSS THE MIDWEST.  HIGH-RES MODELS SUPPORT THE OVERALL
   OBSERVED WEAKENING TRENDS WITH THE ONGOING LINE OF STORMS UNDERGOING
   FURTHER WEAKENING AS IT APPROACHES THE SOUTHEAST IND/SOUTHWEST OH
   BORDER REGION BY 08Z.  PRIOR TO 07-08Z...A LOCALLY STRONG WIND GUST
   CANNOT BE RULED OUT ACROSS CENTRAL IND BEFORE THIS MCS UNDERGOES
   FURTHER DECAY.

   ..PETERS.. 06/21/2015


   ATTN...WFO...ILN...IWX...IND...

   LAT...LON   40548627 40508573 40248498 39938485 39328486 39128493
               38958553 38818651 38968693 39308711 40548627