MESOSCALE DISCUSSION 0930
   NWS STORM PREDICTION CENTER NORMAN OK
   0841 PM CDT SAT MAY 10 2003
   
   AREAS AFFECTED...SERN IL THROUGH CNTRL/SRN IND
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 110141Z - 110345Z
   
   THREAT FOR DAMAGING WIND...LARGE HAIL AND ISOLATED TORNADOES
   EXPECTED TO INCREASE EWD TOWARD IND NEXT FEW HOURS. WW WILL LIKELY
   BE NEEDED WITHIN THE HOUR.
   
   LOW LEVEL JET WILL CONTINUE TO STRENGTHEN THIS EVENING IN RESPONSE
   TO DEEPENING SURFACE LOW OVER THE UPPER MS VALLEY...CONCURRENT WITH
   APPROACHING MID/UPPER JET. THIS WILL MAINTAIN STRONG SHEAR PROFILES
   FOR SUPERCELLS OVER THE OH VALLEY. STORMS DEVELOPING UPSTREAM OVER
   IL EXPECTED TO CONTINUE DEVELOPING EWD INTO CNTRL/SRN IND WHERE THE
   ATMOSPHERE REMAINS MODERATELY UNSTABLE.
   
   ..DIAL.. 05/11/2003
   
   
   ATTN...WFO...ILN...LMK...IWX...IND...PAH...ILX...
   
   38748522 37968731 38598816 39958734 40498565 39898465