MESOSCALE DISCUSSION 0270
   NWS STORM PREDICTION CENTER NORMAN OK
   0527 PM CDT SUN MAR 11 2007
   
   AREAS AFFECTED...SWRN TX
   
   CONCERNING...TORNADO WATCH 57...
   
   VALID 112227Z - 120030Z
   
   THREAT FOR LARGE HAIL...DAMAGING WIND AS WELL AS ISOLATED TORNADOES
   WILL PERSIST OVER REMAINDER OF WW 57 NEXT FEW HOURS.
   
   EARLY THIS EVENING...LINE OF STORMS WITH TRAILING COLD POOL EXTENDS
   FROM ABOUT 50 MI W OF ABILENE SWWD TO JUST SE OF FORT STOCKTON. A
   WELL ORGANIZED SUPERCELL WAS NEAR SANDERSON CROSSING INTO NRN
   MEXICO. ANOTHER WELL ORGANIZED SUPERCELL EMBEDDED WITHIN NRN END OF
   LINE WAS MOVING INTO COKE COUNTY. STORMS WITHIN THE LINE WERE
   DEVELOPING ALONG A COLD FRONT THAT HAS BEEN REINFORCED BY CONVECTIVE
   OUTFLOW. PRESSURE RISES AND NWLY FLOW WITHIN COLD POOL WILL CONTINUE
   TO SUPPORT SEWD PROGRESSION NEXT FEW HOURS. MLCAPE FROM 500 TO 1000
   J/KG EXISTS DOWNSTREAM FROM THIS ACTIVITY. STRONGEST INSTABILITY
   REMAINS NEAR THE BIG BEND AREA WHERE TEMPERATURES HAVE WARMED INTO
   THE 70S. STORMS WILL CONTINUE DEVELOPING ESEWD THIS EVENING WITHIN
   ZONE OF ASCENT DOWNSTREAM FROM VORT MAX ROTATING THROUGH BASE OF
   UPPER TROUGH. LOW LEVEL JET WILL STRENGTHEN THIS EVENING...AND THIS
   WILL RESULT IN FAVORABLE HODOGRAPHS FOR LOW LEVEL MESOCYCLONES AND
   THREAT FOR ISOLATED TORNADOES INTO THE EVENING.
   
   ..DIAL.. 03/11/2007
   
   
   ATTN...WFO...EWX...SJT...MAF...
   
   31079943 29679971 29360055 29790136 29800241 30550253
   31360159 32030025