MESOSCALE DISCUSSION 0897
   NWS STORM PREDICTION CENTER NORMAN OK
   0252 PM CDT MON MAY 23 2011
   
   AREAS AFFECTED...SRN IL/IND...NRN KY...SWRN OH
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 340...341...
   
   VALID 231952Z - 232045Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   340...341...CONTINUES.
   
   NEW WW WILL BE ISSUED BY 21Z DOWNSTREAM OF WW 340/341.
   
   QLCS ACROSS SRN IL APPEARS TO HAVE RECENTLY ACCELERATED AS TSTM
   CORES HAVE BECOME ABSORBED ALONG THE SRN FLANK OF CONVECTIVE
   OUTFLOW. AS TEMPERATURES AHEAD OF THIS LINE HAVE NOW WARMED INTO THE
   MIDDLE TO UPPER 80S...MODIFIED 18Z ILX RAOB SUGGESTS A VERY UNSTABLE
   AIR MASS IS PREVALENT ALONG AND JUST N OF THE LOWER OH VALLEY WITH
   MLCAPE OF 2500 TO 4000 J/KG. WITH A MODERATELY STRONG NEARLY
   UNIDIRECTIONAL W/SWLY LOW/MID-LEVEL WIND PROFILE...EWD FORWARD
   PROPAGATION OF THE MCS SHOULD PERSIST. A SWATH OF DAMAGING WIND AND
   EMBEDDED MARGINALLY SEVERE HAIL APPEARS HIGHLY PROBABLE ACROSS SRN
   IND AND PERHAPS PARTS OF NRN KY/SWRN OH.
   
   ..GRAMS.. 05/23/2011
   
   
   ATTN...WFO...ILN...LMK...IND...PAH...ILX...LSX...
   
   LAT...LON   37888696 37988852 38198882 38448877 39088820 39628836
               39818754 39908667 39908572 39868472 39718408 39398390
               39028399 38568432 38098547 37888696