MESOSCALE DISCUSSION 1725
   NWS STORM PREDICTION CENTER NORMAN OK
   0526 PM CDT SUN JUL 24 2011
   
   AREAS AFFECTED...NORTH DAKOTA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 681...
   
   VALID 242226Z - 250000Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 681
   CONTINUES.
   
   HOWEVER...THE SEVERE THREAT IS EXPECTED TO BEGIN DIMINISHING WITHIN
   THE NEXT COUPLE OF HOURS...AND A NEW WW LIKELY WILL NOT BE NEEDED.
   
   AIDED BY 30-40 KT DEEP LAYER WEST NORTHWESTERLY MEAN FLOW...STRONG
   /SEVERE THUNDERSTORM ACTIVITY APPEARS TO BE GRADUALLY DEVELOPING
   EAST OF AN AXIS OF STRONGER DESTABILIZATION ASSOCIATED WITH A
   CORRIDOR OF WEAK RETURN FLOW EMANATING FROM THE CENTRAL HIGH PLAINS.
    A FEW STORMS LINGER WITHIN THE INSTABILITY AXIS...WHICH EXTENDS
   ROUGHLY ALONG A LINE FROM SOUTHWEST OF DICKINSON THROUGH AREAS
   NORTHWEST OF GRAND FORKS.  BUT OUTFLOW FROM CONVECTION...AND A
   DRYING NORTHWESTERLY LOW-LEVEL FLOW IN THE WAKE OF THE UPPER TROUGH
   PASSING BY TO THE NORTHEAST...WILL CONTINUE TO GRADUALLY STABILIZE
   THE BOUNDARY LAYER LATE THIS AFTERNOON.  AS A RESULT NEW STORM
   DEVELOPMENT PROBABLY WILL BEGIN TO DIMINISH BY 00-01Z...AND ONGOING
   ACTIVITY SHOULD BEGIN TO WEAKEN AS IT INGESTS DRIER AIR WHILE
   APPROACHING SOUTHERN/EASTERN PORTIONS OF THE WATCH.
   
   ..KERR.. 07/24/2011
   
   
   ATTN...WFO...FGF...BIS...UNR...
   
   LAT...LON   46490375 47240186 48109929 48509774 48119711 47459698
               46659691 46299879 46010129 45870328 45970398 46160388
               46490375