MESOSCALE DISCUSSION 1027
   NWS STORM PREDICTION CENTER NORMAN OK
   0236 PM CDT WED JUN 10 2009
   
   AREAS AFFECTED...SERN WY INTO THE NEB PNHDL
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 101936Z - 102030Z
   
   THE THREAT FOR SOME HAIL AND A BRIEF TORNADO OR TWO WILL CONTINUE
   ACROSS AREA THIS AFTERNOON.  A WW IS NOT ANTICIPATED.
   
   SCATTERED TSTMS HAVE BECOME FOCUSED THIS AFTERNOON ALONG AND JUST S
   OF A STATIONARY SURFACE BOUNDARY WHERE BREAKS IN THE THICKER CLOUDS
   HAVE ALLOWED FOR STEEPENING LOW-LEVEL LAPSE RATES WITH MLCAPE OF
   AROUND 500 J/KG.  THESE STEEP LOW-LEVEL LAPSE RATES /AND RESULTANT
   0-3 KM MLCAPE OF 125-150 J PER KG/ COINCIDE WITH A RICH SOURCE OF
   VORTICITY ALONG SURFACE BOUNDARY WITH ENVIRONMENT CONDUCIVE FOR
   VORTEX STRETCHING/AMPLIFICATION IN THE LOWER-LEVELS OF ANY INTENSE
   STORM UPDRAFTS.  AS SUCH...SETUP WILL REMAIN FAVORABLE FOR BRIEF
   TORNADOES IN ADDITION TO SOME HAIL INTO THIS EVENING.
   
   ..MEAD.. 06/10/2009
   
   
   ATTN...WFO...LBF...CYS...
   
   LAT...LON   41950515 42270472 42140332 41660195 41260218 41010268
               41440496 41950515