MESOSCALE DISCUSSION 1073
   NWS STORM PREDICTION CENTER NORMAN OK
   0603 PM CDT THU JUN 02 2011
   
   AREAS AFFECTED...WRN/CNTRL SD...PARTS OF THE NEB PANHANDLE
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 022303Z - 030030Z
   
   TRENDS ARE BEING MONITORED FOR AN INCREASINGLY SEVERE THREAT AND THE
   POSSIBILITY OF A WW.
   
   MID-LEVEL INHIBITION EAST OF THE DRY LINE...ASSOCIATED WITH VERY
   WARM ELEVATED MIXED LAYER AIR...REMAINS STRONG.  HOWEVER...
   SUSTAINED HIGH BASED CONVECTIVE DEVELOPMENT APPEARS TO BE SLOWLY
   INTENSIFYING AS IT DEVELOPS NORTHEASTWARD WITHIN AN APPARENT ZONE OF
   ENHANCED LOW-LEVEL CONVERGENCE EXTENDING ACROSS SOUTHEASTERN
   WYOMING/NORTHWEST NEBRASKA INTO THE VICINITY OF THE DRY LINE ACROSS
   WESTERN SOUTH DAKOTA.  IT APPEARS THAT A ZONE OF STRENGTHENING
   MID-LEVEL FORCING FOR UPWARD VERTICAL MOTION AHEAD AN UPPER IMPULSE
   LIFTING THROUGH THE GREAT BASIN MAY BE CONTRIBUTING TO THIS
   ACTIVITY...AND IT IS POSSIBLE THAT FURTHER INTENSIFICATION...OR
   RAPID NEW DEVELOPMENT NEAR/EAST AND NORTH OF THE BLACK HILLS MAY
   OCCUR DURING THE 00-02Z TIME FRAME.  STEEP LAPSE RATES...LARGE MIXED
   LAYER CAPE ON THE ORDER OF 3000 J/KG... AND AT LEAST MODESTLY STRONG
   DEEP LAYER SHEAR BENEATH 40+ KT SOUTHWESTERLY 500 FLOW WILL BE
   FAVORABLE FOR ORGANIZED SEVERE STORM DEVELOPMENT...INCLUDING
   SUPERCELLS.
   
   ..KERR.. 06/02/2011
   
   
   ATTN...WFO...ABR...LBF...UNR...CYS...
   
   LAT...LON   43920294 44980267 45740222 45820074 44880027 43570081
               42310229 42040350 42650344 43920294