MESOSCALE DISCUSSION 0942
   NWS STORM PREDICTION CENTER NORMAN OK
   0742 PM CDT TUE MAY 24 2011
   
   AREAS AFFECTED...ERN OK THROUGH WRN AR AND NERN TX
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 250042Z - 250145Z
   
   SEVERE THREAT IS EXPECTED TO DEVELOP TOWARD WRN AR AND NERN TX
   DURING THE EVENING. A NEW TORNADO WATCH WILL LIKELY BE NEEDED FOR
   ERN OK...WRN AR AND NERN TX WITHIN THE HOUR.
   
   LATEST OBJECTIVE ANALYSIS INDICATES THE ATMOSPHERE REMAINS
   MODERATELY UNSTABLE FROM ERN OK INTO WRN AR AND NERN TX. ONSET OF
   NOCTURNAL COOLING WILL CONTRIBUTE TO AT LEAST MODEST BOUNDARY LAYER
   STABILIZATION AND INCREASING CONVECTIVE INHIBITION. HOWEVER...LLJ
   WILL SHIFT EWD WITH TIME...AND DEEPER LAYER FORCING ASSOCIATED WITH
   EJECTING VORT MAX SHOULD HELP TO SUSTAIN STORMS WELL INTO THE
   EVENING. LARGE HODOGRAPHS AND EFFECTIVE SHEAR AND 2000 J/KG MLCAPE
   WILL CONTINUE TO SUPPORT SUPERCELLS AND BOWING SEGMENTS WITH A
   THREAT FOR ISOLATED TORNADOES...LARGE HAIL AND DAMAGING WIND. THE
   MORE DISCRETE STORMS ARE EXPECTED TO PERSIST ACROSS SERN OK INTO
   NERN TX WITH MIXED MODES LIKELY TO PERSIST FARTHER NORTH.
   
   ..DIAL.. 05/25/2011
   
   
   ATTN...WFO...LZK...SGF...SHV...TSA...
   
   LAT...LON   33159522 36029529 36859493 36549384 33359409 33159522