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Mesoscale Discussion 312
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   MESOSCALE DISCUSSION 0312
   NWS STORM PREDICTION CENTER NORMAN OK
   0242 PM CDT THU APR 16 2015

   AREAS AFFECTED...N CNTRL TX TO THE MIDDLE TX COASTAL PLAIN

   CONCERNING...SEVERE THUNDERSTORM WATCH 60...

   VALID 161942Z - 162045Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 60
   CONTINUES.

   SUMMARY...CLUSTERS OF STRONG/SEVERE STORMS WILL CONTINUE TO DEVELOP
   THROUGH THE AFTERNOON FROM N TX SWD TO THE MIDDLE TX COAST.  THE
   ENVIRONMENT FAVORS SOME EMBEDDED SUPERCELL STRUCTURES WITH AN
   ATTENDANT RISK FOR LARGE HAIL AND DAMAGING WINDS.

   DISCUSSION...A COMPLICATED SCENARIO IS UNFOLDING FROM N TX SWD TO
   THE MIDDLE TX COASTAL PLAIN THIS AFTERNOON.  MULTIPLE CLUSTERS OF
   STRONG/SEVERE STORMS CONTINUE TO DEVELOP N OF A DIFFUSE WARM FRONT
   FROM THE MIDDLE TX COAST INTO S CENTRAL TX.  AS THIS BOUNDARY SHIFTS
   NWD THROUGH THE AFTERNOON...ADDITIONAL SEVERE STORM DEVELOPMENT IS
   EXPECTED INTO CENTRAL/SE TX...WHERE VERTICAL SHEAR IS SUFFICIENT FOR
   SUPERCELLS CAPABLE OF PRODUCING LARGE HAIL/DAMAGING WINDS.  FARTHER
   W/NW INTO CENTRAL/N CENTRAL TX...CLUSTERS OF STORMS WILL CONTINUE TO
   DEVELOP...AIDED BY ASCENT IN THE EXIT REGION OF A SUBTROPICAL JET
   STREAK.  VERTICAL SHEAR IS A BIT WEAKER COMPARED TO AREAS FARTHER
   S...THUS MORE STORM MERGERS/UPSCALE GROWTH APPEARS PROBABLE...WITH
   EVENTUAL MCS FORMATION POSSIBLE LATER THIS AFTERNOON.  DAMAGING
   OUTFLOW WINDS AND LARGE HAIL WILL BE POSSIBLE WITH THESE CLUSTERS OF
   STORMS.

   ..THOMPSON.. 04/16/2015


   ATTN...WFO...SHV...HGX...FWD...OUN...CRP...EWX...SJT...

   LAT...LON   27829705 27849706 27849706 27849706 28189781 29259880
               30129930 30139930 30509930 32959858 33479841 33889798
               33999769 33999766 33959691 33889594 33889591 33889591
               33849586 33849584 33849584 32369544 31619526 29269583
               28359640 27829705 27829705 

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Page last modified: April 16, 2015
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