MESOSCALE DISCUSSION 0479
   NWS STORM PREDICTION CENTER NORMAN OK
   1212 PM CDT FRI APR 13 2007
   
   AREAS AFFECTED...NWRN/NCNTRL TX
   
   CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY 
   
   VALID 131712Z - 131815Z
   
   WELL DEFINED UPPER LOW IS EJECTING EWD ACROSS NM WITH LEADING EDGE
   OF STRONGER FORCING NOW SPREADING INTO THE TX SOUTH PLAINS.  STRONG
   BOUNDARY LAYER HEATING/MIXING HAS DEVELOPED ACROSS WEST TX WITH WELL
   DEFINED DRY LINE BEGINNING TO SURGE EAST ACROSS THE PERMIAN BASIN. 
   DOWNSTREAM...WARM FRONT CONTINUES TO LIFT NORTH WITH 60S SFC DEW
   POINTS INTO STONEWALL AND HASKELL COUNTIES.  LATEST VIS IMAGERY
   SUGGESTS CU FIELD IS EXPANDING/DEEPENING ACROSS THE WARM
   SECTOR...ALONG/EAST OF DRY LINE TO THE W-N OF ABI.  IT APPEARS
   THUNDERSTORMS WILL DEVELOP WITHIN MOIST SECTOR FROM THIS
   AGITATED...INCREASINGLY BUOYANT AIRMASS BY 20Z.  SUPERCELLS SHOULD
   EVOLVE WITHIN THIS STRONGLY SHEARED ENVIRONMENT THEN QUICKLY MOVE
   NEWD INTO THAT REGION BOUNDED BY ABI-SPS-FTW ZONE.  TORNADOES APPEAR
   LIKELY WITH STRONGEST SUPERCELLS...WHILE LARGE HAIL SHOULD ALSO BE
   COMMON.
   
   ..DARROW.. 04/13/2007
   
   
   ATTN...WFO...FWD...OUN...SJT...LUB...
   
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