MESOSCALE DISCUSSION 1430
   NWS STORM PREDICTION CENTER NORMAN OK
   0336 PM CDT SAT JUL 04 2009
   
   AREAS AFFECTED...NWRN TX...SRN OK...WCNTRL AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 545...546...548...
   
   VALID 042036Z - 042130Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   545...546...548...CONTINUES.
   
   PRE-FRONTAL OUTFLOW BOUNDARY HAS BECOME THE PRIMARY WIND SHIFT FOR
   DEVELOPING THUNDERSTORM ACTIVITY ACROSS THE SRN HALF OF OK INTO
   WCNTRL AR.  CONVECTION HAS ONLY GRADUALLY INTENSIFIED OVER THE LAST
   FEW HOURS BUT SHOULD CONTINUE TO INCREASE AS THE EVENING
   APPROACHES...ESPECIALLY NEAR THE OUTFLOW/FRONTAL INTERSECTION ACROSS
   THE SERN TX PANHANDLE INTO SWRN OK.  IF SUFFICIENT COLD POOL CAN
   GENERATE ACROSS THIS REGION IT APPEARS REASONABLE THAT DAMAGING
   WINDS COULD EVOLVE ALONG LEADING EDGE OF MATURING MCS.  GIVEN THE
   VERY WARM SFC TEMPERATURES...DAMAGING WINDS ARE THE GREATEST SEVERE
   THREAT.
   
   ..DARROW.. 07/04/2009
   
   
   ATTN...WFO...LZK...SHV...TSA...OUN...LUB...AMA...
   
   LAT...LON   35529969 35079798 34869591 35049385 34519353 34129534
               34239782 34079897 33610014 33980082 34830056 35529969