MESOSCALE DISCUSSION 0671
   NWS STORM PREDICTION CENTER NORMAN OK
   0304 PM CDT SAT MAY 02 2009
   
   AREAS AFFECTED...NERN TX...NRN LA
   
   CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON 
   
   VALID 022004Z - 022030Z
   
   LATEST VIS IMAGERY AND RADAR DATA SUGGEST BOUNDARY LAYER THERMALS
   ARE DEEPENING ACROSS THE ARKLATEX REGION...ESPECIALLY NERN TX. 
   SHOWERS ARE GRADUALLY EXPANDING WELL AHEAD OF COLD FRONT ACROSS THE
   WARM SECTOR WHERE SFC TEMPERATURES ARE NOW WELL INTO THE 80S WITH
   NEAR 70F DEW POINTS.  THIS ACTIVITY IS EVOLVING WITHIN INCREASED
   BUOYANCY AND STRENGTHENING SHEAR WHICH SHOULD ENHANCE THE PROSPECT
   FOR SUPERCELL DEVELOPMENT OVER THE NEXT FEW HOURS.  THERE APPEARS TO
   BE A RISK OF TORNADOES WITH DISCRETE ACTIVITY THAT EVOLVES AHEAD OF
   COLD FRONT...WHILE AN UPWARD EVOLVING MCS SHOULD EVENTUALLY SPREAD
   ACROSS NCNTRL TX INTO THIS AREA LATER THIS EVENING WITH AT LEAST
   HAIL/DAMAGING WINDS.
   
   ..DARROW.. 05/02/2009
   
   
   ATTN...WFO...JAN...LIX...LCH...SHV...HGX...FWD...
   
   LAT...LON   33029569 33009119 31279131 31309570 33029569