MESOSCALE DISCUSSION 0628
   NWS STORM PREDICTION CENTER NORMAN OK
   1207 PM CDT WED APR 29 2009
   
   AREAS AFFECTED...PORTIONS OF THE TX SOUTH PLAINS/TRANSPECOS REGION
   EWD INTO N TX
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 291707Z - 291900Z
   
   CONVECTIVE DEVELOPMENT IS ONGOING ACROSS PARTS OF THE BIG COUNTRY
   REGION OF TX -- ALONG WITH SLOWLY-INCREASING SEVERE POTENTIAL.  WW
   MAY BE REQUIRED.
   
   LATEST RADAR LOOP SHOWS CONVECTIVE DEVELOPMENT OCCURRING IN A W-E
   BAND FROM BORDEN COUNTY TX EWD TOWARD THE DFW METROPLEX -- ALONG AN
   OLD OUTFLOW BOUNDARY WHICH HAS BEGUN TO STALL ACROSS THIS REGION. 
   VISIBLE IMAGERY SHOWS THIS BOUNDARY...ALONG WITH SOME BREAKS IN THE
   OVERCAST WHICH COMBINED WITH THE MOISTENING BOUNDARY LAYER ARE
   YIELDING MODERATE AIRMASS DESTABILIZATION.  WHILE BOTH THE JAYTON TX
   PROFILER AND DYESS AFB VWP SHOW A WEAKNESS IN THE FLOW AROUND 700
   MB...THE OVERALL DEEP-LAYER WIND PROFILE IS SUPPORTIVE OF SUPERCELL
   STORMS.  AS ADDITIONAL HEATING/DESTABILIZATION OCCUR...EXPECT STORMS
   TO INCREASE IN BOTH COVERAGE AND INTENSITY.  ALONG WITH A THREAT FOR
   HAIL AND DAMAGING WINDS...A TORNADO THREAT IS ALSO EVOLVING --
   PARTICULARLY WITH STORMS INVOF THE BOUNDARY WHERE LOCALLY-ENHANCED
   VORTICITY/BACKED LOW-LEVEL FLOW FIELD EXISTS.
   
   ..GOSS.. 04/29/2009
   
   
   ATTN...WFO...FWD...OUN...SJT...LUB...MAF...
   
   LAT...LON   31720167 32320208 33640167 33539903 33039666 32309658
               31819725 31720167