MESOSCALE DISCUSSION 0915
   NWS STORM PREDICTION CENTER NORMAN OK
   0857 PM CDT MON JUN 01 2009
   
   AREAS AFFECTED...CNTRL IL/IND AND CNTRL/WRN OH
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 318...320...
   
   VALID 020157Z - 020300Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   318...320...CONTINUES.
   
   SVR TSTM WATCHES 318/320 HAVE A 03Z EXPIRATION.  
   
   SATL/RADAR SHOW AN MCV OVER ECNTRL IL...PROGRESSING EWD ALONG A
   BAROCLINIC ZONE SITUATED DOWNSTREAM INTO CNTRL OH.  THIS FEATURE HAS
   CONTRIBUTED TO AN ENHANCEMENT OF TSTMS ACROSS CNTRL IL SINCE LATE
   AFTN...BUT RADAR SUGGESTS THAT MOST CELLS HAVE WELL-DEVELOPED COLD
   POOLS THAT ARE RACING AHEAD OF THE UPDRAFTS.  THIS MAY BE A SIGN
   THAT THE WIDESPREAD SVR THREAT IS GRADUALLY DIMINISHING.  THE
   TRAINING HVY RNFL THREAT...HOWEVER...WILL CONTINUE AS STORMS MOVE
   FROM ECNTRL IL INTO WCNTRL/CNTRL IND AND POSSIBLY SWRN OH OVER THE
   NEXT FEW OF HOURS.  WHILE THE SVR THREAT IS WANING...ISOLD DMGG WIND
   GUSTS/SMALL HAIL MAY STILL ACCOMPANY ANY STRONGER STORM.
   
   ..RACY.. 06/02/2009
   
   
   ATTN...WFO...CLE...ILN...IWX...IND...LOT...ILX...DVN...
   
   LAT...LON   40879081 40798791 40708557 40868396 41278337 41518291
               40818247 40378255 40068293 39808418 40018567 40008798
               40359037 40409106 40879081