MESOSCALE DISCUSSION 0748
   NWS STORM PREDICTION CENTER NORMAN OK
   0556 PM CDT THU MAY 07 2009
   
   AREAS AFFECTED...CENTRAL IL/WESTERN INDIANA/NORTHEAST MO
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 072256Z - 080000Z
   
   DAMAGING WINDS/SEVERE HAIL MAY CONTINUE OVER THE NEXT SEVERAL HOURS
   ACROSS EAST CENTRAL IL INTO WESTERN INDIANA...WITH ADDITIONAL
   DEVELOPMENT ACROSS NORTHEAST MO INTO WEST CENTRAL IL. A WATCH
   APPEARS LIKELY.
   
   STRONG/SEVERE TSTMS CONTINUE TO CONSOLIDATE ALONG THE I-55 CORRIDOR
   NEAR/NORTH OF SPRINGFIELD IN CENTRAL IL AS OF 2240Z. THIS ACTIVITY
   IS OCCURRING ALONG A WEAK WARM FRONT/SURFACE MOISTURE
   GRADIENT...LIKELY AIDED BY A MID LEVEL SPEED MAXIMA PER REGIONAL
   PROFILERS/WSR-88D VWPS. THE WARM BOUNDARY LAYER AHEAD OF THE
   MAJORITY OF THE EVOLVING MCS HAS TENDED TO MIX AGGRESSIVELY...BUT A
   MODEST/EXPANDING COLD POOL AND MOISTURE FEED FROM THE WEST-SOUTHWEST
   COULD SUPPORT FURTHER UPSCALE GROWTH...WITH A DAMAGING WIND/HAIL
   THREAT CONTINUING EAST-SOUTHEASTWARD ACROSS EAST CENTRAL IL/PERHAPS
   WESTERN INDIANA. OTHERWISE...FARTHER WEST...ALSO MONITORING FOR A
   POSSIBLE WATCH ACROSS NORTHEAST MO/WEST CENTRAL IL IN ASSOCIATION
   WITH UPSTREAM MCS ACROSS NORTHERN MO.
   
   ..GUYER.. 05/07/2009
   
   
   ATTN...WFO...IND...ILX...LSX...DVN...
   
   LAT...LON   40709155 40228823 39648692 38598781 39589203 40709155