MESOSCALE DISCUSSION 1642
   NWS STORM PREDICTION CENTER NORMAN OK
   0611 PM CDT SUN JUL 17 2011
   
   AREAS AFFECTED...NRN WI...U.P. OF MI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 653...
   
   VALID 172311Z - 180015Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 653
   CONTINUES.
   
   LOW LEVEL WARM ADVECTION APPEARS TO BE THE DRIVING MECHANISM IN
   ONGOING ELEVATED CONVECTION ACROSS THE UPPER GREAT LAKES REGION. 
   STRONG UPDRAFTS HAVE PROPAGATED INTO NWRN WI AND ARE SPREADING EAST
   OF WW653.  THIS ACTIVITY WILL LIKELY DEVELOP INTO PORTIONS OF THE
   WRN U.P. OF MI OVER THE NEXT 1-2 HOURS WITH THE PRIMARY SEVERE
   THREAT BEING LARGE HAIL.  WILL MONITOR THIS REGION FOR A NEW SEVERE
   THUNDERSTORM WATCH.
   
   ..DARROW.. 07/17/2011
   
   
   ATTN...WFO...MQT...GRB...DLH...ARX...MPX...
   
   LAT...LON   46379222 46779034 46348811 45368805 45298973 45709191
               46379222