SPC MESOSCALE DISCUSSION 0750 FOR ...NERN TX/SRN AR/NWRN LA...
   CONCERNING...SEVERE THUNDERSTORM WATCH 274...
   
   VALID 100604Z - 100800Z
   
   WE MAY REPLACE WW IN ORDER TO EXTEND WW NWD ACROSS PARTS OF SERN
   OK.
   
   STORMS CONTINUE TO INCREASE IN COVERAGE ACROSS NERN TX INTO SRN AR
   AND NRN LA SPREADING NEWD INTO SERN OK AHEAD OF MID LEVEL SHORTWAVE
   TROUGH ACROSS KS INTO W TX.  PROFILER/VAD WIND DATA SHOWS 30 KT LOW
   LEVEL FLOW ACROSS CENTRAL TX INTO SERN OK ENHANCING LIFT ACROSS
   QUASISTATIONARY BOUNDRY ACROSS NRN TX AND NRN LA.  RUC MODEL
   FORECAST SOUNDINGS SHOW ELEVATED CAPE VALUES AROUND 2000 J/KG
   LIFTED AROUND THE 850 MB LAYER...WITH WET BULB ZERO LEVELS AROUND
   12K FT.  THUS...MAIN THREAT THIS MORNING IS EXPECTED TO BE HAIL
   WITH DIAMETERS AN INCH OR LESS.
   
   ..MCCARTHY.. 05/10/02