MESOSCALE DISCUSSION 2272
   NWS STORM PREDICTION CENTER NORMAN OK
   0445 PM CDT TUE AUG 26 2003
   
   AREAS AFFECTED...SERN IA...NERN MO...CENTRAL IL
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 262145Z - 262315Z
   
   ...SEVERE THUNDERSTORM WATCH MAY BE REQUIRED OVER PORTIONS OF THE
   MID MS VALLEY INTO CENTRAL IL IN THE NEXT 1-2 HOURS...
   
   PLUME OF STEEP LAPSE RATES HAVE ADVECTED DOWNSTREAM WITHIN CONFLUENT
   FLOW ACROSS THE MID MS VALLEY REGION TOWARD CENTRAL IL.  BOUNDARY
   LAYER UPSTREAM ACROSS NRN MO HAS DEEPENED SIGNIFICANTLY WITH
   CONSIDERABLE BOUNDARY LAYER CU AND DEVELOPING THUNDERSTORMS TO NEAR
   THE MISSISSIPPI RIVER. THIS ACTIVITY IS DEVELOPING ALONG SRN
   FRINGES OF STRONGER FLOW ALOFT...BUT WITHIN FAIRLY UNSTABLE AIRMASS.
    IT APPEARS BOTH ADVECTION/NEW DEVELOPMENT WILL OCCUR EWD INTO
   CENTRAL IL OVER THE NEXT FEW HOURS.  DAMAGING WINDS AND POSSIBLY
   LARGE HAIL WILL BE THE SEVERE THREATS.
   
   ..DARROW.. 08/26/2003
   
   
   ATTN...WFO...LOT...ILX...LSX...DVN...DMX...
   
   41039219 41258990 41028878 40468846 39908891 39839030
   39979231