MESOSCALE DISCUSSION 2259
   NWS STORM PREDICTION CENTER NORMAN OK
   1221 AM CDT TUE AUG 26 2003
   
   AREAS AFFECTED...SRN WI THROUGH NRN IL
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 260521Z - 260645Z
   
   STORMS OVER NERN IA CONTINUE TO ORGANIZE. IF THIS TREND CONTINUES
   ...A WW MAY BE NEEDED FOR PARTS OF SRN WI THROUGH SRN IL WITHIN THE
   HOUR.
   
   THIS EVENING A WARM FRONT EXTENDS FROM NRN IA THROUGH NRN IL AND SRN
   MI. WARM ADVECTION AND LIFT ASSOCIATED WITH SWLY LOW LEVEL JET IS
   SUPPORTING CLUSTER OF CONVECTION CURRENTLY DEVELOPING ACROSS ERN IA.
   STORMS OVER NERN IA HAVE BECOME A LITTLE BETTER ORGANIZED AS A LINE
   DURING THE PAST SEVERAL MINUTES. ONCE THE STORMS ORGANIZE A COLD
   POOL...THEY COULD BECOME FORWARD PROPAGATING. HOWEVER...A LIMITING
   FACTOR FOR STRONG FORWARD PROPAGATION IS WEAKER INSTABILITY ACROSS
   NERN IL AND SERN WI. PRIMARY THREATS WILL BE DAMAGING WIND AND
   POSSIBLY SOME HAIL.
   
   ..DIAL.. 08/26/2003
   
   
   ATTN...WFO...LOT...MKX...DVN...ARX...
   
   43159065 43178810 42178773 42099019