MESOSCALE DISCUSSION 1203
   NWS STORM PREDICTION CENTER NORMAN OK
   0642 PM CDT FRI JUN 26 2015

   AREAS AFFECTED...MIDDLE TN TO SWRN OH

   CONCERNING...SEVERE THUNDERSTORM WATCH 360...

   VALID 262342Z - 270045Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 360
   CONTINUES.

   SUMMARY...PRIMARY SEVERE THREATS IN THE FORM OF ISOLATED DAMAGING
   WINDS EXIST WITH A CLUSTER PROGRESSING FROM N-CNTRL KY INTO PARTS OF
   WW 363 AND WITH A SLOWER MOVING LINE OF CONVECTION APPROACHING
   MIDDLE TN FROM WW 359. MUCH OF WW 360 IS IN THE PROCESS OF BEING
   CANCELLED EARLY PER COORDINATION WITH WFOS.

   DISCUSSION...CONVECTIVELY-MODIFIED AIR HAS OVERSPREAD MOST OF
   CURRENTLY VALID PORTIONS OF WW 360...WITH ANY REMAINING SEVERE
   THREAT OVER THE NEXT HOUR ACROSS PARTS OF N-CNTRL KY AND OVER THE
   NEXT 2-3 HOURS IN MIDDLE TN. UPSTREAM CONVECTION OVER SRN IL/SWRN
   IND SHOULD STRUGGLE TO INTENSIFY GIVEN THE EXTENSIVE DOWNSTREAM
   OVERTURNING DESPITE FORCED ASCENT TIED TO THE SHORTWAVE TROUGH
   CROSSING IL.

   ..GRAMS.. 06/26/2015


   ATTN...WFO...JKL...ILN...LMK...OHX...HUN...MEG...

   LAT...LON   36128783 36278649 36848512 38408447 38818455 39128367
               38908357 37678412 36338499 35648636 34978686 35028798
               36128783