MESOSCALE DISCUSSION 0980
   NWS STORM PREDICTION CENTER NORMAN OK
   1223 PM CDT SUN JUN 03 2007
   
   AREAS AFFECTED...ERN WI...NE IL...UPPER MI AND NW IND
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 031723Z - 031900Z
   
   AN ISOLATED SEVERE THREAT WILL BE LIKELY THIS AFTERNOON ACROSS WRN
   UPPER MI...ERN WI...NE IL AND NW IND. ISOLATED WIND DAMAGE AND HAIL
   WILL BE POSSIBLE WITH THE STRONGER CELLS. THE ACTIVITY SHOULD REMAIN
   TOO MARGINAL TO WARRANT A WW THIS AFTERNOON.
   
   17Z SFC ANALYSIS SHOWS A LOW OVER SE WI WITH A COLD FRONT EXTENDING
   SWD ACROSS ECNTRL IL. A LAKE BREEZE IS LOCATED ON THE WRN SHORE OF
   LAKE MICHIGAN AND THUNDERSTORMS ARE INCREASING ALONG THESE TWO
   CONVERGENCE ZONES. AS AN UPPER-LEVEL LOW OVER WI MOVES SLOWLY EWD
   THIS AFTERNOON...STRONG LARGE-SCALE ASCENT AND INCREASING
   INSTABILITY WILL SUPPORT CONTINUED THUNDERSTORM DEVELOPMENT. IN
   ADDITION...A BAND OF STRONGER MID-LEVEL FLOW ASSOCIATED WITH THE
   UPPER-LEVEL LOW EXISTS ACROSS SRN IA...NRN IL AND SE WI AND THIS IS
   CREATING ENOUGH VERTICAL SHEAR FOR ISOLATED SEVERE STORMS.
   HOWEVER...INSTABILITY REMAINS RELATIVELY WEAK AND THIS SHOULD KEEP
   ANY SEVERE THREAT MARGINAL
   
   ..BROYLES.. 06/03/2007
   
   
   ATTN...WFO...IWX...IND...MQT...GRB...LOT...ILX...MKX...
   
   40108792 40938848 42428905 43628914 45168887 46128810
   46228743 45798696 44898747 43988769 42868773 41718749
   40378698