MESOSCALE DISCUSSION 1250
   NWS STORM PREDICTION CENTER NORMAN OK
   0118 AM CDT SAT JUN 23 2012
   
   AREAS AFFECTED...SRN SD...CNTRL/ERN NEB AND ADJACENT WRN IA...NRN KS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 420...
   
   VALID 230618Z - 230745Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 420
   CONTINUES.
   
   SUMMARY...AN ADDITIONAL WW IS NOT CURRENTLY ANTICIPATED...BUT
   OCCASIONAL STRONG SURFACE GUSTS AND SOME HAIL PROBABLY WILL PERSIST
   WITH CONVECTION UNTIL IT BEGINS TO WEAKEN NEAR DAYBREAK.
   
   DISCUSSION...A CONTINUED GRADUAL VEERING OF THE 40-50+ KT CENTRAL
   HIGH PLAINS 850 MB JET...FROM SOUTHERLY TO SOUTHWESTERLY...THROUGH
   THE REMAINDER OF THE NIGHT IS EXPECTED TO CONTRIBUTE TO SUFFICIENT
   DESTABILIZATION TO SUPPORT EAST SOUTHEASTWARD DEVELOPMENT OF ONGOING
   CONVECTION INTO THE MIDDLE MISSOURI VALLEY.  FORECAST SOUNDINGS
   SUGGEST THAT MAXIMUM CAPE WILL BECOME LESS SIZABLE WITH EASTWARD
   EXTENT...SO THE SEVERE HAIL POTENTIAL PROBABLY WILL BECOME MORE
   MARGINAL WITH TIME.  GIVEN THE STRENGTH OF THE LOW-LEVEL FLOW AND
   THE SIZE OF THE SUB-CLOUD TEMPERATURE-DEW POINT SPREADS...THE
   POTENTIALLY FOR LOCALLY STRONG WIND GUSTS MAY BE A BIT
   GREATER...PARTICULARLY WITH STRONGER STORMS NOW ACROSS SOUTH CENTRAL
   NEBRASKA.  STILL...BEYOND THE NEXT HOUR OR SO...THIS SEEMS LIKELY TO
   BECOME MORE SPORADIC IN NATURE.
   
   ..KERR.. 06/23/2012
   
   
   ATTN...WFO...DMX...EAX...FSD...OAX...TOP...ABR...GID...LBF...
   UNR...GLD...
   
   LAT...LON   44670038 44539798 42799560 40549502 39649695 39760001
               40350067 41570104 43750328 44670038