MESOSCALE DISCUSSION 0673
   NWS STORM PREDICTION CENTER NORMAN OK
   0510 PM CDT SAT MAY 02 2009
   
   AREAS AFFECTED...NERN TX AND NRN LA
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 022210Z - 022315Z
   
   21Z SHV SOUNDING EXHIBITED MINIMAL SBCINH...1761 J/KG MLCAPE AND
   H7-H5 LAPSE RATES OF 7.7 C/KM.  TSTMS DEVELOPING UPSTREAM ACROSS
   NERN TX WILL PROBABLY CONTINUE FORWARD PROPAGATING AS THE WSWLY FLOW
   IN THE COLUMN AND COLD POOL DYNAMICS STRENGTHEN THROUGH THE EVE. 
   DMGG WINDS WILL BECOME MORE OF A THREAT WITH TIME ALONG WITH LARGE
   HAIL POTENTIAL.  HOWEVER...A BRIEF TORNADO COULD ALSO
   OCCUR...ESPECIALLY IF A SUSTAINED BOW HEAD CAN BEGIN TO ATTACH WITH
   AND FOLLOW THE SWD MOVG OUTFLOW BOUNDARY MIGRATING SWD INTO EXTREME
   NRN LA.  TSTMS ARE EXPECTED TO MOVE OUT OF THE RECENTLY ADDED
   TORNADO WATCH IN NERN TX...LIKELY GRAZING NRN PARTS OF LA.  THIS
   SITUATION WOULD REQUIRE A NEW WW TO FILL IN THE GAP ACROSS NRN LA.
   
   ..RACY.. 05/02/2009
   
   
   ATTN...WFO...JAN...SHV...
   
   LAT...LON   33019401 32969127 32179114 31959396 31859529 33019401