MESOSCALE DISCUSSION 0951
   NWS STORM PREDICTION CENTER NORMAN OK
   0600 PM CDT THU MAY 27 2004
   
   AREAS AFFECTED...CNTRL PARTS OF IL/IND/OH
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 309...
   
   VALID 272300Z - 280030Z
   
   LARGE HAIL AND DAMAGING WIND THREAT CONTINUES FROM ECNTRL IL INTO
   WCNTRL OH WITHIN WW 309 FOR THE NEXT COUPLE OF HOURS.
   
   WEAK WARM ADVECTION HAS BEEN SUPPORTING TWO CORRIDORS OF TSTMS...ONE
   FROM NCNTRL IND INTO CNTRL OH AND ANOTHER ACROSS SRN PARTS OF
   IND/IL...JUST SOUTH OF WW 309. A NARROW WEDGE OF UNSTABLE AIR MASS
   WITH MLCAPES NEAR 2000 J/KG RESIDES ACROSS CNTRL IND BETWEEN THE TWO
   LINES OF TSTMS AND AHEAD OF A WEAK WIND SHIFT MOVING INTO NWRN
   IND/CNTRL IL.  
   
   TSTMS SHOULD CONTINUE TO DEVELOP ALONG OUTFLOW BOUNDARIES WITHIN
   THIS UNSTABLE AIR MASS FOR THE NEXT FEW HOURS. VERTICAL SHEAR IS
   MORE THAN SUFFICIENT FOR SUPERCELLS AND MAINLY LARGE HAIL AND
   DAMAGING WINDS CAN BE EXPECTED.
   
   ..RACY.. 05/27/2004
   
   
   ATTN...WFO...CLE...ILN...IWX...IND...LOT...ILX...
   
   39709022 39919022 40498755 41088680 40718346 39158360