MESOSCALE DISCUSSION 1465
   NWS STORM PREDICTION CENTER NORMAN OK
   0735 PM CDT FRI JUL 01 2011
   
   AREAS AFFECTED...CNTRL AND NERN IA / SERN MN / WRN WI
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 020035Z - 020130Z
   
   STORMS ARE RAPIDLY DEVELOPING IN A SQUALL LINE S OF THE EXISTING
   SEVERE WATCH ACROSS NRN IA WITH MORE ISOLD ACTIVITY DEVELOPING OVER
   CNTRL IA.  A LARGE HAIL AND DMGG WIND THREAT MAY INCREASE TO THE
   IMMEDIATE E OF THE ONGOING STORMS AS THE STORMS INTENSIFY.  STORMS
   WILL PROBABLY CONTINUE TO DEVELOP IN COVERAGE TO THE E AND NE ACROSS
   NERN IA-EXTREME SERN MN AND WRN WI.  A WW IS POSSIBLE--PERHAPS
   WITHIN THE NEXT HOUR OR SO.
   
   SURFACE ANALYSIS PLACES A COLD FRONT REINFORCED BY AN ACTIVE COLD
   POOL ACROSS S-CNTRL MN INTO NWRN IA.  THE AIRMASS TO THE E OF THE
   DEVELOPING STORMS IS QUITE UNSTABLE WITH 5200 J/KG MLCAPE NOTED ON
   THE 00Z DVN RAOB.  ALTHOUGH A POTENT SHORTWAVE TROUGH IS LIFTING TO
   THE NE ACROSS THE UPPER MS VALLEY AWAY FROM THE REGION...THE
   VOLATILE THERMODYNAMIC POTENTIAL AND IMPROVING DEEP LAYER SHEAR WILL
   SUPPORT ORGANIZED STORMS /INITIALLY SUPERCELL STRUCTURE WITH MORE
   DISCRETE ACTIVITY AND BOWING SEGMENTS/ AS IT MOVES EWD ACROSS NERN
   IA-SERN MN AND WRN WI.  THESE STORMS WILL PROBABLY POSE AN ISOLD
   LARGE HAIL/DMGG WIND THREAT WITH DMGG WINDS BECOMING THE PRIMARY
   HAZARD AS CONVECTIVE MODE TRANSITIONS TO LINEAR.
   
   ..SMITH.. 07/02/2011
   
   
   ATTN...WFO...GRB...MKX...ARX...MPX...DMX...FSD...OAX...
   
   LAT...LON   42129529 43439447 44139275 45299087 45309025 44248991
               43619014 42179322 41869426 41839508 42129529