MESOSCALE DISCUSSION 0966
   NWS STORM PREDICTION CENTER NORMAN OK
   0840 PM CDT WED MAY 21 2008
   
   AREAS AFFECTED...ERN WY/FAR SWRN SD/NEB PANHANDLE/NERN-EAST CENTRAL
   CO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 333...
   
   VALID 220140Z - 220245Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 333
   CONTINUES.
   
   GREATEST SEVERE WEATHER THREATS DURING THE NEXT HOUR OR TWO ARE
   EXPECTED TO BE OVER MAINLY EAST CENTRAL/SERN WY AND ACROSS EAST
   CENTRAL TO NERN CO.
   
   REGIONAL RADARS/SATELLITE IMAGERY/LIGHTNING DATA SHOWED TWO ONGOING
   CLUSTERS OF TSTMS...1) LOCATED OVER EAST CENTRAL/SERN WY...AND 2)
   LOCATED OVER EAST CENTRAL/NERN CO.  THIS ACTIVITY IS LOCATED WITHIN
   ZONE OF UPPER LEVEL DIFFLUENT FLOW PER 00Z UPPER AIR ANALYSIS
   MAINTAINING STRONG MASS EVACUATION AT CLOUD TOP LEVEL.  THIS
   COMBINED WITH ONGOING STORMS LOCATED WITHIN MOIST/INSTABILITY AXIS
   SUGGEST THAT STRONG TO SEVERE STORMS WILL REMAIN POSSIBLE WITHIN
   VALID PART OF WW.  CAP/INHIBITION WAS NOTED ON THE LBF/RAP 00Z
   SOUNDINGS. THIS SHOULD LIMIT EWD SEVERE WEATHER THREAT INTO WRN
   SD/WRN NEB.  HOWEVER...THE FAR SWRN SD/NEB PANHANDLE PORTIONS OF WW
   333 COULD HAVE A SEVERE WEATHER THREAT AS A POTENTIALLY COLD
   POOL-ENHANCED LINE OF TSTMS IN ERN WY SPREADS INTO THESE TWO STATES.
   
   ..PETERS.. 05/22/2008
   
   
   ATTN...WFO...LBF...UNR...GLD...PUB...BOU...CYS...BYZ...
   
   39070195 38110223 38240343 39310330 40020359 40540465
   41910526 42990563 43530540 44370514 44940475 45040399
   43900378 43900269 41760260 40900202