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Mesoscale Discussion 471
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   MESOSCALE DISCUSSION 0471
   NWS STORM PREDICTION CENTER NORMAN OK
   0551 PM CDT SUN APR 26 2015

   AREAS AFFECTED...CNTRL AND N CNTRL TX

   CONCERNING...TORNADO WATCH 121...

   VALID 262251Z - 270015Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 121 CONTINUES.

   SUMMARY...SCATTERED SUPERCELLS WILL PERSIST THROUGH LATE
   EVENING...WITH A CONTINUED RISK FOR TORNADOES...VERY LARGE
   HAIL...AND DAMAGING GUSTS.  A STRONG TORNADO WILL BE POSSIBLE LATER
   THIS EVENING AS LOW-LEVEL MOISTURE AND SHEAR INCREASE.

   DISCUSSION...THERE HAS BEEN SOME MIXING OF LOW-LEVEL MOISTURE ACROSS
   CENTRAL TX...TO THE S OF THE WEAKENING SUPERCELL IN ERATH COUNTY. 
   THE MIXING HAS RESULTED IN SOME REDUCTION IN BUOYANCY AND HIGHER LCL
   HEIGHTS...BUT OBSERVATIONS A BIT FARTHER S SHOW MOISTURE RECOVERING
   AS SURFACE TEMPERATURES REMAIN WELL INTO THE 80S.  DEWPOINTS ARE
   EXPECTED TO RECOVER INTO THE MID 60S THIS EVENING INTO THE ZONE OF
   BACKED WINDS WITH THE RESIDUAL OUTFLOW/DIFFERENTIAL HEATING BOUNDARY
   FROM ABOUT WACO TO BROWNWOOD.  ALSO...LOW-LEVEL SHEAR WILL INCREASE
   IN RESPONSE TO THE SYNOPTIC WAVE EMERGING OVER W TX...WHICH SHOULD
   SUPPORT A REJUVENATION OF THE TORNADO RISK BY ABOUT 00-01Z.  IN THE
   INTERIM...NEW STORMS WILL LIKELY DEVELOP NEAR TRIPLE POINT CLOSE TO
   BROWNWOOD...WITH A CONTINUED RISK FOR VERY LARGE HAIL AND DAMAGING
   GUSTS.

   ..THOMPSON.. 04/26/2015


   ATTN...WFO...FWD...SJT...

   LAT...LON   32299809 32059784 31829790 31679809 31679853 31729906
               31789951 31979960 32259937 32389882 32299809 

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Page last modified: April 27, 2015
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