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Mesoscale Discussion 636
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   MESOSCALE DISCUSSION 0636
   NWS STORM PREDICTION CENTER NORMAN OK
   0646 PM CDT WED MAY 13 2015

   AREAS AFFECTED...SOUTHWEST/WCNTRL TX

   CONCERNING...SEVERE THUNDERSTORM WATCH 170...

   VALID 132346Z - 140115Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 170
   CONTINUES.

   SUMMARY...SEVERE THREAT WILL GRADUALLY DECREASE INTO THE EVENING
   HOURS AS INSTABILITY WEAKENS ACROSS SEVERE THUNDERSTORM WATCH.

   DISCUSSION...NARROW CORRIDOR OF INSTABILITY IS GRADUALLY BEING
   OVERTURNED ACROSS THE EDWARDS PLATEAU REGION OF WEST TX AS ISOLATED
   STORMS PROPAGATE SWD TOWARD THE INTERNATIONAL BORDER.  HAIL
   CONTINUES TO BE POSSIBLE WITH THIS ACTIVITY BUT AN OVERALL DOWNWARD
   TREND IS EXPECTED AS BOUNDARY LAYER COOLING COMMENCES.

   ..DARROW.. 05/13/2015


   ATTN...WFO...FWD...EWX...SJT...MAF...

   LAT...LON   28430199 32230119 32219896 28429984 28430199 

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