SPC MESOSCALE DISCUSSION 2308 FOR COASTAL SERN TX THROUGH COASTAL
SWRN LA
CONCERNING...TORNADO WATCH 834...

VALID 280355Z - 280600Z

THREAT FOR ISOLATED TORNADOES CONTINUES NEXT FEW HOURS FROM COASTAL
SERN TX NEAR THE GALVESTON AREA NEWD INTO SWRN LA.

SURFACE FRONT REMAINS OFFSHORE OF SERN TX NEAR GALVESTON AND
EXTENDS NEWD INTO SWRN LA NEAR LAKE CHARLES. ONLY WEAK PRESSURE
RISES EXIST OVER SERN TX/SWRN LA...AND THE FRONT COULD STILL MOVE
A LITTLE FARTHER INLAND AS LOW LEVEL JET INCREASES NEXT FEW HOURS.
STRONG LOW LEVEL SHEAR EXISTS IN THE VICINITY OF THIS BOUNDARY.
SURFACE OBSERVATIONS AND THE 00Z LAKE CHARLES SOUNDING SHOW THE
BOUNDARY LAYER AIR JUST N OF THE FRONT TO BE VERY SHALLOW WITH
TEMPERATURES IN THE 60S. THIS SUGGESTS THAT AS THE UPDRAFTS CROSS
ONTO THE COOLER SIDE OF THE BOUNDARY...THEY SHOULD REMAIN NEAR
SURFACE BASED AND MAY BE ABLE TO INGEST SOME OF THE VORTICITY IN
THE BOUNDARY LAYER BEFORE BECOMING ELEVATED AS THEY MOVE FARTHER
INLAND.

..DIAL.. 11/28/01