SPC MESOSCALE DISCUSSION 1135 FOR...SRN IA...NRN IL...ERN WI...
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL...
   
   VALID 151851Z - 152330Z
   
   WIDELY SCATTERED MARGINALLY SEVERE HAIL AND FEW STRONG WIND GUSTS
   MAY DEVELOP OVER PARTS OF THE MIDWEST AND WRN GREAT LAKES THIS
   AFTERNOON. WEAK STORM ORGANIZATION IS EXPECTED TO PRECLUDE A WATCH
   AT THIS TIME.
   
   WARM AND RELATIVELY MOIST BOUNDARY LAYER AND COLD TEMPERATURES
   ALOFT WERE CONTRIBUTING TO MLCAPE VALUES OF 800-1000 J/KG ACROSS
   SERN IA...EWD AND NEWD INTO NRN IL AND ERN WI. LOW AMPLITUDE SHORT
   WAVE TROUGHS MOVING SEWD IN FAST NWLY FLOW ALOFT...ONE OVER SRN
   SD...AND ANOTHER OVER NRN MN/WI AREA...WILL CONTINUE TO PROVIDE
   BACKGROUND FORCING FOR ASCENT AND ENHANCE DIURNAL TSTM DEVELOPMENT
   ACROSS THE REGION THROUGH THE REST OF THE AFTERNOON. LACK OF STRONG
   LOW LEVEL FORCING FOR THIS ACTIVITY WILL MAKE IT DIFFICULT TO FOCUS
   THESE UPDRAFTS. HOWEVER...MAGNITUDE OF MID LEVEL LAPSE RATES...
   UPWARD MOTION...AND LOW WBZ LEVELS WILL FAVOR A FEW RANDOMLY
   SCATTERED SEVERE HAIL EVENTS...AND PERHAPS A FEW STRONG WIND GUSTS 
   THROUGH 23Z.
   
   ..CARBIN.. 06/15/02