MESOSCALE DISCUSSION 1960
   NWS STORM PREDICTION CENTER NORMAN OK
   0947 PM CDT WED SEP 12 2007
   
   AREAS AFFECTED...UPPER TX COAST/FAR SE TX AND FAR SW LA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 130247Z - 130415Z
   
   THREAT FOR WATERSPOUTS APPEARS TO BE INCREASING...WITH SOME TORNADO
   THREAT POSSIBLE ALONG THE COASTAL AREAS OF THE UPPER TX COAST TO SW
   LA THROUGH THE LATE EVENING INTO THE OVERNIGHT PERIOD. 
   
   AT 0230Z...REGIONAL RADARS INDICATED THE OUTERMOST CONVECTIVE BAND
   ATTENDANT TO T.S. HUMBERTO EXTENDED FROM SWRN LA...IN CAMERON PARISH
   TO 115 SE GLS.  LCH RADAR ALSO INDICATED SEVERAL PERSISTENT LOW
   LEVEL ROTATION COUPLETS WITHIN THIS BAND TRACKING TOWARD THE NNW. 
   HIGH THETA-E AIR MASS LOCATED ALONG AND OFFSHORE COMBINED WITH 0-3
   KM SRH VALUES AROUND 135 M2/S2 SUGGEST POTENTIAL FOR A TORNADO
   THREAT TO INCREASE ALONG THE IMMEDIATE COAST AS ROTATIONAL COUPLETS
   TRACK TOWARD THE COAST. 
   
   LOW LEVEL NELY FLOW LOCATED AWAY FROM THE COAST IS ADVECTING LOW
   THETA-E AIR MASS SWWD.  THIS IS EXPECTED TO LIMIT THE TORNADO THREAT
   FROM DEVELOPING FARTHER INLAND FROM THE COAST.  GIVEN THIS
   SCENARIO...GREATEST TORNADO THREAT SHOULD EXTEND FROM THE SW LA
   PARISHES OF CAMERON AND VERMILION...AND WWD INTO THE UPPER TX
   COASTAL AREAS TO THE NE OF GLS.
   
   ..PETERS.. 09/13/2007
   
   
   ATTN...WFO...LCH...HGX...
   
   29309473 29789469 30039427 30139326 30029260 29519233
   29209248 29259363 29079447