MESOSCALE DISCUSSION 1434
   NWS STORM PREDICTION CENTER NORMAN OK
   0629 PM CDT SAT JUL 04 2009
   
   AREAS AFFECTED...NWRN TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 548...
   
   VALID 042329Z - 050030Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 548
   CONTINUES.
   
   SEVERE THUNDERSTORMS WITH A PRIMARY THREAT OF DMGG WINDS CONTINUES
   FOR WW0548. EASTWARD EXTENSION OF COUNTIES OR A NEW WW MAY BE NEEDED
   IN N TX.
   
   THUNDERSTORMS HAVE DEVELOPED ALONG A COLD FRONT EXTENDING WSWWD FROM
   A SURFACE LOW ROUGHLY OVER SWRN OK...AND ALONG A PREFRONTAL TROUGH
   THAT EXTENDS SWD INTO THE BIG BEND AREA. GREATER EFFECTIVE SHEAR
   ALONG THE NRN PORTION OF THE WW HAS ALLOWED FOR BETTER ORGANIZATION
   OF STORMS...WITH A MEASURED GUST TO 89 MPH RECENTLY REPORTED IN
   COTTLE COUNTY. FARTHER S...ALTHOUGH EFFECTIVE SHEAR IS COMPARATIVELY
   WEAKER...STORMS WILL CONTINUE TO PROPAGATE EWD TOWARDS GREATER
   INSTABILITY. LARGE TEMPERATURE/DEW POINT SPREADS AND STEEP LOW LEVEL
   LAPSE RATES WILL LEAD TO STRONG WIND GUSTS. GIVEN CURRENT EXPIRATION
   TIME...EWD EXTENSION OF COUNTIES OR A NEW WW MAY BE NEEDED IN N TX.
   
   ..HURLBUT.. 07/04/2009
   
   
   ATTN...WFO...FWD...OUN...SJT...LUB...AMA...MAF...
   
   LAT...LON   32419968 31720051 31570182 31610264 32320283 33440183
               34450113 35180010 34859886 33559868 32419968