MESOSCALE DISCUSSION 0075
   NWS STORM PREDICTION CENTER NORMAN OK
   0648 AM CST SAT FEB 15 2003
   
   AREAS AFFECTED...SOUTH TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 6...
   
   VALID 151248Z - 151415Z
   
   12Z SOUNDINGS FROM SOUTH TX REFLECT MID LEVEL CAA AHEAD OF UPPER
   SHORTWAVE TROUGH LIFTING ACROSS NERN MEXICO.  THIS APPEARS TO BE
   PARTLY RESPONSIBLE FOR ORIENTATION OF ONGOING CONVECTION AS IT
   MARCHES EWD AT ROUGHLY 30 KT.  SQUALL LINE WILL LIKELY MOVE INTO
   NWRN PORTIONS OF GULF OF MEXICO...WITH NWD DEVELOPMENT POSSIBLE
   INTO MIDDLE/UPPER TX COAST REGION OVER THE NEXT FEW HOURS. 
   LOCALLY DAMAGING WINDS AND LARGE HAIL REMAIN POSSIBLE WITH THIS
   ACTIVITY.
   
   ..DARROW.. 02/15/2003
   
   
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