MESOSCALE DISCUSSION 1830
   NWS STORM PREDICTION CENTER NORMAN OK
   0902 AM CDT TUE AUG 02 2011
   
   AREAS AFFECTED...EAST CENTRAL MN AND WEST CENTRAL WI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 717...
   
   VALID 021402Z - 021500Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 717
   CONTINUES.
   
   AT 1350Z...REGIONAL RADAR IMAGERY SHOWED A FAST MOVING...COMPACT BOW
   ECHO...TRACKING EWD AT CLOSE TO 50 KT ACROSS THE NRN TWIN CITIES
   METRO...WITH THE NRN EXTENT EXTENDING INTO ISANTI COUNTY.  OVERALL
   SEVERE WEATHER THREAT IS EXPECTED TO CONTINUE WANING IN THE WAKE OF
   THE BOW...AND THUS COUNTIES WITH ITS PASSAGE CAN BE CANCELED FROM WW
   717.
   
   THE CURRENT SPEED OF THIS BOW WILL SPREAD THE THREAT FOR DAMAGING
   WINDS ACROSS THE ST CROIX RIVER VALLEY IN /ERN CHISAGO COUNTY MN AND
   WRN POLK COUNTY WI/ BETWEEN 14-1415Z...AND THEN THE THREAT FOR
   DAMAGING WINDS WILL ADVANCE EWD IN A RATHER NARROW CORRIDOR THROUGH
   BARRON TO RUSK COUNTIES WI BY 15Z AND 16Z...RESPECTIVELY.  THIS BOW
   WAS TRACKING THROUGH A CORRIDOR OF MODERATE INSTABILITY WHICH SHOULD
   CONTINUE TO ASSIST IN MAINTAINING THE INTENSITY OF THIS SYSTEM.  BY
   16Z...THIS BOW WILL HAVE REACHED THE WRN EXTENT OF THE MCS LOCATED
   OVER CENTRAL/NERN WI...AND MAY RESULT IN THE DEMISE OF THE MN
   BOW...UNLESS IT BEGINS TO TURN MORE SEWD.
   
   ..PETERS.. 08/02/2011
   
   
   ATTN...WFO...DLH...ARX...MPX...
   
   LAT...LON   44639096 44529230 44829313 45159318 45609323 45759311
               45829144 45759054 45049047 44689064 44639096