MESOSCALE DISCUSSION 1198
   NWS STORM PREDICTION CENTER NORMAN OK
   0607 PM CDT SUN JUN 12 2011
   
   AREAS AFFECTED...WRN/CNTRL ND
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 122307Z - 130000Z
   
   NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS HAVE DEVELOPED ACROSS
   THE NRN HIGH PLAINS FROM ERN MT...INTO WRN SD.  THIS ACTIVITY IS
   GRADUALLY EXPANDING IN AREAL COVERAGE WITH SEVERAL UPDRAFTS
   OBTAINING MORE INTENSE STRUCTURES...ESPECIALLY OVER SERN MT/NERN
   WY/WRN SD.  NEW TSTMS ARE NOW SPREADING ACROSS SWRN ND WITHIN
   INCREASING WARM ADVECTION REGIME AND THIS CONVECTION WILL LIKELY
   PERSIST WELL INTO THE OVERNIGHT HOURS AS LLJ IS EXPECTED TO INCREASE
   IN EXCESS OF 50KT ACROSS CNTRL ND BY LATE EVENING.  GIVEN THESE
   TRENDS A NEW WW MAY BE REQUIRED SHORTLY TO ADDRESS THIS SEVERE
   THREAT.
   
   ..DARROW.. 06/12/2011
   
   
   ATTN...WFO...FGF...ABR...BIS...
   
   LAT...LON   49010046 46559861 45930071 46330322 48710362 49010046