MESOSCALE DISCUSSION 1435
   NWS STORM PREDICTION CENTER NORMAN OK
   0657 PM CDT SAT JUL 04 2009
   
   AREAS AFFECTED...SRN/CNTRL OK
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 546...
   
   VALID 042357Z - 050100Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 546
   CONTINUES.
   
   THUNDERSTORMS THAT DEVELOPED NEAR THE OUTFLOW/FRONTAL INTERSECTION
   ARE NOW SLOWLY PROGRESSING EWD IN MODEST FLOW. HOT TEMPERATURES IN
   THE UPPER 90S TO NEAR 100 DEGREES AND LARGE DEW POINT SPREADS WILL
   LIKELY LEAD TO A CONTINUED EWD PROGRESSION OF A DMGG WIND THREAT
   ACROSS SRN OK/NRN TX. ADDITIONAL DEVELOPMENT REMAINS POSSIBLE ON THE
   NRN EXTENT OF CURRENT CONVECTION AS A COLD FRONT SLOWLY SAGS
   SWD...WHERE THE AIRMASS REMAINS MODERATELY UNSTABLE AND RELATIVELY
   UNAFFECTED BY PREVIOUS CONVECTION. TO THE E OF CURRENT
   CONVECTION...MODERATE INSTABILITY REMAINS...THOUGH COOLER SURFACE
   TEMPERATURES AND EXPANSIVE CIRRUS SHIELD WILL LIKELY LIMIT SURFACE
   BASED STORMS...AND THE THREAT OF HAIL MAY BECOME PREDOMINANT. HIGH
   PWAT AND RELATIVELY SLOW MOVING STORMS WILL LEAD TO A HEAVY RAIN
   THREAT AS STORMS CONTINUE TO TRAIN ACROSS THE WATCH AREA. WITH
   MARGINAL THREAT CONTINUING AFTER 01Z...A LOCAL EXTENSION IN TIME OR
   AN ADDITIONAL WW MAY BE NEEDED.
   
   ..HURLBUT.. 07/04/2009
   
   
   ATTN...WFO...TSA...FWD...OUN...
   
   LAT...LON   35409589 34309569 33799634 34169816 34259911 34569996
               35259999 35719943 35899703 35809616 35409589