MESOSCALE DISCUSSION 1439
   NWS STORM PREDICTION CENTER NORMAN OK
   0853 PM CDT FRI JUN 20 2003
   
   AREAS AFFECTED...SRN TX PANHANDLE AND TX SOUTH PLAINS
   
   CONCERNING...TORNADO WATCH 552...
   
   VALID 210153Z - 210300Z
   
   ISOLATED SUPERCELLS WILL CONTINUE TO POSE A THREAT FOR LARGE HAIL
   AND DAMAGING WINDS THROUGH WW EXPIRATION TIME. DESPITE INTENSIFYING
   LOW LEVEL JET...INCREASING BOUNDARY LAYER INHIBITION WILL LIKELY
   LIMIT THE TORNADO THREAT OVER THE REMAINDER VALID PORTIONS OF WW 552
   THROUGH EXPIRATION TIME.
   
   CLUSTER OF STRONG-SEVERE THUNDERSTORMS IN THE TX SOUTH PLAINS...WILL
   CONTINUE TO MOVE EWD AROUND 20 KTS. BOUNDARY LAYER COOLING WILL
   INCREASE CONVECTIVE INHIBITION OVER THE REGION DURING THE NEXT
   SEVERAL HOURS. HOWEVER...INCREASING 34-40 KT SSELY LOW LEVEL JET
   SHOULD AID IN SUSTAINED ELEVATED CONVERGENCE INTO CONVECTIVE CLUSTER
   SUPPORTING AN MCS OVER THE SRN TX PANHANDLE/TX SOUTH PLAINS BEYOND
   WW 552 EXPIRATION TIME. HOWEVER... WEAKENING MID/UPPER LEVEL WINDS
   TO THE EAST OF WW 552 SHOULD LIMIT THE OVERALL INTENSITY OF
   CONVECTION AND THE NEED FOR AN ADDITIONAL WW EAST OF WW 552.
   
   ..CROSBIE.. 06/21/2003
   
   
   ATTN...WFO...LUB...AMA...MAF...ABQ...
   
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