MESOSCALE DISCUSSION 0628
   NWS STORM PREDICTION CENTER NORMAN OK
   0958 PM CDT FRI MAY 10 2013
   
   AREAS AFFECTED...SOUTH TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 157...
   
   VALID 110258Z - 110500Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 157
   CONTINUES.
   
   SUMMARY...THUNDERSTORMS THAT WERE EARLIER TRACKING SOUTHEASTWARD
   TOWARD THE VCT/CRP AREA HAVE DIMINISHED.  HOWEVER...NEW STORMS HAVE
   FORMED WEST OF LRD AND MAY AFFECT PORTIONS OF THE WATCH AREA SOON.
   
   DISCUSSION...A NEW CLUSTER OF INTENSE THUNDERSTORMS HAS FORMED OVER
   NORTHERN MEXICO JUST WEST OF LRD.  THESE STORMS HAVE DEVELOPED IN
   VICINITY OF A WEAK COLD FRONT/OUTFLOW BOUNDARY THAT NOW STRETCHES
   FROM NORTH OF LRD TO NEAR VCT.  THE 00Z CRP RAOB INDICATED A VERY
   MOIST BOUNDARY LAYER AND STEEP LAPSE RATES ALOFT...BUT ALSO
   INDICATED A CAPPING INVERSION THAT WILL LIKELY KEEP STORMS FROM
   DEVELOPING TOO FAR EAST.  NEVERTHELESS...SUPERCELL STORMS MAY CROSS
   THE RIO GRANDE INTO WEBB/LA SALLE/DUVAL COUNTIES TX DURING THE NEXT
   HOUR OR TWO.  LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE.
   
   ..HART.. 05/11/2013
   
   
   ATTN...WFO...HGX...CRP...EWX...BRO...
   
   LAT...LON   28309942 28659815 28909754 29139691 28589664 27989728
               27499832 27279939 27850023 28309942