MESOSCALE DISCUSSION 0993
   NWS STORM PREDICTION CENTER NORMAN OK
   1033 PM CDT FRI MAY 23 2008
   
   AREAS AFFECTED...SRN NEB...MUCH OF CENTRAL KS...ERN TX
   PANHANDLE...ERN OK PANHANDLE INTO WRN OK
   
   CONCERNING...TORNADO WATCH 342...344...
   
   VALID 240333Z - 240430Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 342...344...CONTINUES.
   
   ...SQUALL LINE EVOLVING INTO DISCRETE SUPERCELLS WITH INCREASING
   POTENTIAL FOR TORNADOES...
   
   REGIONAL RADARS SHOWED SQUALL LINE THAT FORMED EARLIER HAS NOW
   EVOLVED INTO A BROKEN LINE OF MORE DISCRETE-TYPE SUPERCELLS
   EXTENDING FROM THE NERN TX PANHANDLE TO JUST EAST OF HLC. 
   THERMODYNAMIC AND KINEMATIC ENVIRONMENTS REMAIN VERY FAVORABLE FOR
   STRONG LONG-LIVED TORNADOES AS THIS ACTIVITY SPREADS ENEWD DURING
   THE NEXT SEVERAL HOURS.  AREA WIND PROFILERS AND WSR-88D VWP DATA
   SHOWED MID LEVEL WINDS VEERING TO SWLY...AS INDICATED BY SHORT TERM
   MODELS.  THIS WILL CONTINUE TO SUPPORT THE EVOLUTION OF MORE
   DISCRETE STORMS INTO THE LATE EVENING/EARLY OVERNIGHT PERIOD. 
   STRONG SLY LLJ FROM OK INTO KS COMBINED WITH THE VEERING MID LEVEL
   WINDS WILL SUPPORT A FURTHER INCREASE IN LOW LEVEL SHEAR WITH
   EFFECTIVE SRH VALUES NOW RANGING FROM 400-600 M2/S2.  THIS SUPPORTS
   THE POTENTIAL FOR LONG-LIVED STRONG TO VIOLENT TORNADOES.
   
   ADDITIONAL STORM DEVELOPMENT IS EXPECTED SWD THROUGH THE ERN TX
   PANHANDLE AS THE COLD FRONT CONTINUES TO SPREAD EWD OVERTAKING THE
   DRY LINE.  THIS TREND APPEARS LIKELY GIVEN RECENT NEW TSTM
   DEVELOPMENT IN THE NERN TX PANHANDLE...AND GIVEN FAVORABLE
   INSTABILITY AND STRONG EFFECTIVE BULK SHEAR FOR ORGANIZED STORMS.
   
   ..PETERS.. 05/24/2008
   
   
   ATTN...WFO...OAX...TOP...ICT...OUN...GID...LBF...DDC...GLD...LUB...AMA...
   
   34730100 35960073 37030008 38209984 38430000 39150081
   39580096 39590129 40310133 40390021 40719987 40729730
   40009737 40009679 39649672 38569692 38419729 38079714
   37039716 36959799 36219808 35639828 35289854 34869866
   34609884 34349928