MESOSCALE DISCUSSION 0389
   NWS STORM PREDICTION CENTER NORMAN OK
   0657 PM CDT SAT APR 09 2011
   
   AREAS AFFECTED...SERN SD...SRN MN
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 092357Z - 100100Z
   
   LOW LEVEL WARM ADVECTION IS STRENGTHENING ACROSS SERN SD AND SRN MN
   AS LLJ IMPINGES ON WARM FRONT.  LATEST RUC GUIDANCE SUGGESTS THIS
   PROCESS WILL ONLY INCREASE DURING THE EVENING HOURS FORCING MOISTURE
   ATOP COOLER BOUNDARY LAYER.  WITH STEEP LAPSE RATES IN PLACE
   SIGNIFICANT ELEVATED INSTABILITY WILL DEVELOP ACROSS THIS REGION
   SUCH THAT LARGE HAIL SHOULD BE COMMON WITH ANY SUPERCELL STRUCTURES.
   SEVERE THUNDERSTORM WATCH WILL BE WARRANTED ACROSS THIS REGION SOON.
   
   ..DARROW.. 04/09/2011
   
   
   ATTN...WFO...ARX...MPX...FSD...ABR...
   
   LAT...LON   44699815 44859334 43609302 43509729 43559891 44699815