MESOSCALE DISCUSSION 0797
   NWS STORM PREDICTION CENTER NORMAN OK
   0222 PM CDT TUE MAY 06 2008
   
   AREAS AFFECTED...SERN SD...FAR NERN NEB...NWRN IA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 265...
   
   VALID 061922Z - 062115Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 265
   CONTINUES.
   
   A LINE OF SEVERE THUNDERSTORMS HAS RAPIDLY INCREASED IN INTENSITY
   OVER THE LAST HOUR AS IT HAS ENCOUNTERED A MORE UNSTABLE AIR MASS.
   SURFACE ANALYSIS SHOWS TEMPERATURES NOW INTO THE UPPER 70S...ALONG
   WITH DEWPOINTS INTO THE LOWER 50S. AS A RESULT OF HEATING...LOW
   LEVEL LAPSE RATES HAVE BECOME STEEP...ERASING CONVECTIVE INHIBITION.
   THE ENVIRONMENT DOWNSTREAM OF THIS CONVECTIVE LINE HAS THUS BECOME
   FAVORABLE FOR STRONG EVAPORATIVE COOLING AND DAMAGING WIND
   GUSTS...WHICH MAY BECOME FURTHER ENHANCED DUE TO LARGE AMOUNTS OF
   HAIL IN THESE STORMS. DAMAGING HAIL WILL REMAIN LIKELY WITH THESE
   STORMS AS WELL.
   
   FARTHER W...OUTFLOW HAS STABILIZED MUCH OF THE WRN PORTION OF WW
   265...ALTHOUGH AN OUTFLOW BOUNDARY HAS BEEN LAID DOWN. NEW
   CONVECTIVE DEVELOPMENT IS LIKELY W AND SW OF THE WATCH...AND THIS
   DEVELOPMENT COULD RE-ENTER WW 265 LATER THIS AFTERNOON.
   
   ..JEWELL.. 05/06/2008
   
   
   ATTN...WFO...DMX...FSD...OAX...
   
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