MESOSCALE DISCUSSION 0345
   NWS STORM PREDICTION CENTER NORMAN OK
   1150 AM CDT MON APR 04 2011
   
   AREAS AFFECTED...SERN IND...SWRN OH
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 88...
   
   VALID 041650Z - 041715Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 88
   CONTINUES.
   
   PER COORDINATION WITH WFO ILN...WW 88 WILL BE ALLOWED TO EXPIRE AT
   17Z. DESPITE LINEAR STORM MODE...LONG-TERM REFLECTIVITY TRENDS AND
   OBSERVED WIND GUSTS /AOB 35 KT/ SUGGEST ACTIVITY HAS REMAINED
   SUB-SEVERE. AMBIENT INSTABILITY IS RATHER WEAK WITHIN MOST OF THE WW
   AREA. HOWEVER...MORE PRONOUNCED SURFACE HEATING HAS OCCURRED NEAR
   THE OH RIVER WHICH MAY AID IN INTENSIFICATION OF THE QLCS TOWARDS
   19-20Z. THUS...WILL CONTINUE TO MONITOR FOR A NEW WW LATER THIS
   AFTERNOON.
   
   ..GRAMS.. 04/04/2011
   
   
   ATTN...WFO...CLE...ILN...IND...
   
   LAT...LON   39168578 39968467 40318392 40398325 40358276 40108262
               39508315 38888374 38768411 38958538 38968580 39168578