MESOSCALE DISCUSSION 1393
   NWS STORM PREDICTION CENTER NORMAN OK
   0505 AM CDT SUN JUN 15 2003
   
   AREAS AFFECTED...RIO GRANDE VALLEY AND S CENTRAL TX...
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 151005Z - 151200Z
   
   SEVERE THREAT SHOULD PERSIST FOR THE NEXT 1 TO 2 HOURS ACROSS PARTS
   OF S CENTRAL TX.  HOWEVER...NEW WW NOT ANTICIPATED ATTM DUE TO
   LIMITED AREA / MARGINAL THREAT.
   
   THUNDERSTORMS CONTINUE ACROSS MUCH OF CENTRAL AND S TX IN MODERATELY
   UNSTABLE AIRMASS.  HOWEVER...DEEP-LAYER WIND SHEAR ACROSS THE REGION
   REMAINS WEAK...SUGGESTING THAT THE SEVERE THREAT SHOULD REMAIN
   LIMITED TO ISOLATED STRONGER STORMS.
   
   THE GREATEST SEVERE THREAT APPEARS TO EXIST INVOF THE RIO GRANDE
   VALLEY FROM ROUGHLY DRT TO LRD.  INSTABILITY IS MAXIMIZED ACROSS
   THIS AREA...AND OUTFLOW BOUNDARY FROM CONVECTION INVOF SAT IS MOVING
   SWWD INTO THIS REGION.	THIS SUGGESTS THAT CLUSTER OF CONVECTION
   APPROACHING THE DRT AREA FROM THE NW MAY POSE A THREAT FOR HAIL UP
   TO 1" IN DIAMETER AND POSSIBLE A FEW SEVERE WIND GUSTS OVER THE NEXT
   COUPLE OF HOURS BEFORE BEING UNDERCUT BY OUTFLOW FROM THE SAT STORM
   CLUSTER.
   
   ..GOSS.. 06/15/2003
   
   
   ATTN...WFO...CRP...EWX...
   
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