MESOSCALE DISCUSSION 0574
   NWS STORM PREDICTION CENTER NORMAN OK
   0638 AM CDT FRI MAY 07 2004
   
   AREAS AFFECTED...PARTS OF NRN IL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 153...
   
   VALID 071138Z - 071315Z
   
   STRONG / SEVERE THUNDERSTORMS CONTINUE MOVING ESEWD ACROSS WW 0153.
   
   LATEST RADAR LOOP SHOWS SEVERAL SEVERE STORMS / SUPERCELLS AFFECTING
   AREAS IN AND CLOSE TO WW ATTM...WITH STRONGEST STORMS AFFECTING
   GRUNDY AND LIVINGSTON COUNTIES -- MOVING SEWD AT 40 TO 45 KT.
   
   STORMS ARE SLIGHTLY ELEVATED -- OCCURRING JUST ON THE COOL SIDE OF
   SYNOPTIC-SCALE FRONT...WHERE AXIS OF 1500 TO 2500 J/KG MOST-UNSTABLE
   CAPE IS INDICATED.  WITH A WELL-DEVELOPED CONVECTIVE OUTFLOW AT THE
   LEADING EDGE OF THE COLD POOL AND ELY LOW-LEVEL FLOW...STRONG
   CONVERGENCE SHOULD ALLOW FORWARD-PROPAGATING CLUSTER OF SEVERE
   STORMS TO CONTINUE FOR AT LEAST THE NEXT 1 TO 2 OF HOURS -- AT WHICH
   TIME LEADING STORMS WILL BE MOVING OUT OF WW.  NEW WW MAY BE
   REQUIRED DOWNSTREAM GIVEN ANTICIPATED CONTINUATION OF STORMS WITHIN
   MODERATELY UNSTABLE / STRONGLY-SHEARED ENVIRONMENT.
   
   ..GOSS.. 05/07/2004
   
   
   ATTN...WFO...ILN...IWX...IND...LOT...ILX...DVN...
   
   41569012 41608761 41228513 40478458 39838504 39888763
   40439005