MESOSCALE DISCUSSION 1242
   NWS STORM PREDICTION CENTER NORMAN OK
   0604 PM CDT FRI JUN 19 2009
   
   AREAS AFFECTED...SRN LOWER MI
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 192304Z - 200030Z
   
   SEVERE THREAT IS FORECAST TO SLOWLY INCREASE DURING THE NEXT 1-2
   HOURS...POSSIBLY REQUIRING SEVERE THUNDERSTORM WATCH ISSUANCE.
   
   STORMS ARE ONGOING ATTM OVER SERN WI AND SPREADING SLOWLY EWD TOWARD
   SRN LK MI...WHILE ASCENT/NEW CONVECTION CONTINUES TO INCREASE ACROSS
   SRN LOWER MI.  WHILE AIRMASS ACROSS THIS AREA IS ONLY MARGINALLY
   UNSTABLE...MODERATE/WEAKLY-VEERING FLOW WITH HEIGHT IS YIELDING
   SHEAR SUFFICIENT FOR ORGANIZED STORMS.  WHILE HAIL POTENTIAL SHOULD
   REMAIN MARGINAL AS STORMS DEVELOP ACROSS/MOVE INTO THIS
   REGION...THREAT FOR DAMAGING WINDS SHOULD INCREASE WITH TIME.
   
   ..GOSS.. 06/19/2009
   
   
   ATTN...WFO...CLE...DTX...IWX...GRR...
   
   LAT...LON   42058511 42208636 43598658 43148349 42798275 41578322
               41658374 42058511