SPC MESOSCALE DISCUSSION 1600 FOR SERN TX...INCLUDING MIDDLE AND
   UPPER COASTAL PLAIN
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL...
   
   VALID 042151Z - 050000Z
   
   ISOLATED DAMAGING WIND GUSTS AND LARGE HAIL ARE EXPECTED TO
   CONTINUE ACROSS SERN TX DURING THE NEXT 2-3 HOURS. DEEP-LAYER FLOW
   FAVORS A WSWLY TO SWLY MOTION OF CONVECTIVE CLUSTERS ACROSS THE
   UPPER AND MIDDLE TX COASTAL PLAIN. 
   
   RUC OBJECTIVE ANALYSIS FIELDS VALID AT 21Z INDICATE MODERATELY
   UNSTABLE TO VERY UNSTABLE AIRMASS IN PLACE OVER SERN TX...WITH
   100MB MLCAPE VALUES OF 2500-3500 J/KG. ALSO...MID-LEVEL DRY AIR PER
   ETA MODEL SOUNDINGS ACROSS THE DISCUSSION AREA WILL BE CONDUCIVE
   FOR ISOLATED DAMAGING DOWNDRAFTS AND A FEW ORGANIZED MULTICELLULAR
   STORM CLUSTERS. WBZ HEIGHTS OF 10.5-11 KFT ARE RELATIVELY LOW FOR
   AUGUST. GIVEN INSTABILITY VALUES...LONGER-LIVED AND MORE INTENSE
   CORES WILL LIKELY CONTAIN SEVERE HAIL. LIMITED LARGE-SCALE FORCING
   WILL LESSEN SEVERITY OF THUNDERSTORMS LATER THIS EVENING WITH ONSET
   OF DIURNAL COOLING. 
   
   ..BANACOS.. 08/04/02