MESOSCALE DISCUSSION 1529
   NWS STORM PREDICTION CENTER NORMAN OK
   0644 PM CDT WED JUL 18 2007
   
   AREAS AFFECTED...SERN MN...WCENTRAL/SWRN WI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 533...
   
   VALID 182344Z - 190145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 533
   CONTINUES.
   
   SVR THREAT WILL REMAIN RELATIVELY ISOLATED OVER FAR SERN MN/SWRN WI
   FOR THE NEXT 1-2 HOURS...AND WW 533 MAY BE CANCELLED EARLY. 
   
   RADAR IMAGERY SHOWS SWD MOVING OUTFLOW BOUNDARIES OVER FAR SERN
   MN/WCENTRAL WI. TO THE NORTH OF THESE BOUNDARIES MUCH MORE STABLE
   AIR HAS ENDED THE SVR THREAT OVER THE NRN PORTION OF WW 533. AHEAD
   OF THESE BOUNDARIES...A SMALL CORRIDOR OF SFC BASED INSTABILITY
   STILL REMAINS TO SUPPORT A MARGINAL SVR RISK FOR THE NEXT COUPLE OF
   HOURS ACROSS FAR SERN MN/SWRN WI. GIVEN PRESENT MOVEMENT OF THESE
   BOUNDARIES...WW 533 MAY BE CANCELLED EARLY.
   
   ..CROSBIE.. 07/18/2007
   
   
   ATTN...WFO...GRB...MKX...ARX...
   
   44439073 44419128 44369151 43869217 43679199 43579165
   43499088 43559034 43718967 44058960 44189013 44389043