MESOSCALE DISCUSSION 1057
   NWS STORM PREDICTION CENTER NORMAN OK
   0343 PM CDT THU JUN 11 2009
   
   AREAS AFFECTED...TX PNHDL
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 112043Z - 112215Z
   
   TSTMS CAPABLE OF ISOLATED SEVERE WEATHER WILL BE POSSIBLE INTO THIS
   EVENING.  CONVECTIVE TRENDS WILL BE MONITORED FOR A POSSIBLE WW.
   
   TSTMS ARE ATTEMPTING TO BECOME SUSTAINED NEAR AMA ALONG OR JUST IN
   THE WAKE OF A WEAK BOUNDARY SHIFTING NWWD THROUGH CARSON...ARMSTRONG
   AND RANDALL COUNTIES PER HIGH-RESOLUTION RADAR DATA.  THIS BOUNDARY
   IS LOCATED TO THE N OF SYNOPTIC FRONT WHICH ALSO APPEARS TO BE
   LIFTING NWD THROUGH THE SWRN PNHDL.
   
   LOW-LEVEL ENELY TRAJECTORIES EMANATING FROM SURFACE HIGH OVER THE
   CNTRL HIGH PLAINS IN CONJUNCTION WITH INCREASING HIGH CLOUDS HAVE
   HELD TEMPERATURES IN THE 70S TO LOWER 80S.  AS A RESULT...AIR MASS
   IS ONLY MARGINALLY UNSTABLE WITH MLCAPE BELOW 1000 J/KG.  DESPITE
   THE MARGINAL INSTABILITY...SOME THREAT FOR ISOLATED SEVERE WEATHER
   WILL EXIST WITH ANY STORMS THAT BECOME SUSTAINED GIVEN 40-50 KT OF
   DEEP-LAYER SHEAR AND INCREASED FORCING ASSOCIATED WITH APPROACHING
   SHORT WAVE TROUGH.
   
   ..MEAD.. 06/11/2009
   
   
   ATTN...WFO...LUB...AMA...
   
   LAT...LON   34720182 35230199 35810192 36190163 36320094 35830022
               35060040 34580111 34720182