MESOSCALE DISCUSSION 0543
   NWS STORM PREDICTION CENTER NORMAN OK
   0916 AM CDT SAT MAY 01 2004
   
   AREAS AFFECTED...MID/UPPER TEXAS COASTAL AREAS
   
   CONCERNING...TORNADO WATCH 141...
   
   VALID 011416Z - 011515Z
   
   NEW WW LIKELY WILL BE ISSUED ACROSS UPPER TEXAS COASTAL AREAS BY
   15Z.
   
   MID-LEVEL CIRCULATION CENTER AND TROUGH ASSOCIATED WITH REMNANTS OF
   OVERNIGHT MCS ARE PROGRESSING EAST OF THE SAN ANTONIO AREA...AT
   AROUND 30 KTS. UNTIL THIS FEATURE MOVES ACROSS MID/UPPER TEXAS
   COASTAL AREAS DURING THE 17-18Z TIME FRAME...INTENSE PRE-FRONTAL
   CONVECTIVE LINE WILL BE SLOW TO ADVANCE INTO/THROUGH THE HOUSTON
   METROPOLITAN AREA AND ADJACENT COASTAL COMMUNITIES.
   
   CONVECTIVE INHIBITION IS WEAKENING ALONG/AHEAD OF LINE WITH STRONG
   LIFT...AND POTENTIAL STILL EXISTS FOR ISOLATED SUPERCELL DEVELOPMENT
   IN WARM SECTOR ENVIRONMENT ALONG COASTAL AREAS WITH MEAN MIXED LAYER
   CAPE IN EXCESS OF 2000 J/KG.  OTHERWISE...AS WEAKENING MID-LEVEL JET
   STREAK ASSOCIATED WITH CIRCULATION APPROACHES THE HOUSTON AREA
   TOWARD 17Z... CONVECTIVE LINE MAY SURGE EASTWARD...ACCOMPANIED BY
   DAMAGING WINDS/LARGE HAIL AND VERY HEAVY RAIN.
   
   ..KERR.. 05/01/2004
   
   
   ATTN...WFO...LCH...HGX...
   
   28809556 29019615 29489604 29939540 30459476 30679423
   30409372 29789334