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Mesoscale Discussion 340
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   MESOSCALE DISCUSSION 0340
   NWS STORM PREDICTION CENTER NORMAN OK
   0502 PM CDT FRI APR 17 2015

   AREAS AFFECTED...W-CNTRL/NW/N-CNTRL TX

   CONCERNING...SEVERE THUNDERSTORM WATCH 67...

   VALID 172202Z - 172330Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 67
   CONTINUES.

   SUMMARY...A RISK FOR ISOLATED SEVERE HAIL MAY PERSIST THROUGH ABOUT
   00-01Z WITH BOTH A LEADING TSTM CLUSTER APPROACHING THE METROPLEX
   AND REDEVELOPMENT ALONG THE DRYLINE OVER THE CONCHO VALLEY. OVERALL
   THREAT MAY REMAIN TOO MARGINAL FOR AN ADDITIONAL WW ISSUANCE.

   DISCUSSION...LEAD TSTM CLUSTER OVER N-CNTRL TX IS GRADUALLY EVOLVING
   EWD WITHIN A MODEST LOW/MID-LEVEL SHEAR ENVIRONMENT AND
   VEER-BACK-VEER WIND PROFILE SAMPLED IN FWS VWP DATA. AMIDST WEAK
   BUOYANCY...CONVECTION WILL PROBABLY STRUGGLE TO FURTHER INTENSIFY
   WITH MARGINALLY SEVERE HAIL AND LOCALLY STRONG WIND GUSTS AS THE
   MAIN HAZARDS. FARTHER SW TOWARDS THE CONCHO VALLEY...INITIAL
   REDEVELOPMENT WEAKENED ABOUT HALF-HOUR AFTER INITIATION FROM NOLAN
   TO STERLING COUNTIES. OUTFLOW-INDUCED CONVERGENCE ALONG THE DRYLINE
   WILL REMAIN PRONOUNCED FOR A COUPLE MORE HOURS. BUT THIS REGION WILL
   LIE IN BETWEEN MID-LEVEL IMPULSES AND ASSOCIATED SPEED MAXIMA
   CURLING FROM ERN NM INTO CO AND THE OTHER FROM CHIHUAHUA TOWARDS S
   TX. GIVEN A DOWNSTREAM CONVECTIVELY-OVERTURNED AIR MASS...TSTMS WILL
   LIKELY STRUGGLE TO MAINTAIN ORGANIZED UPDRAFTS INTO MID-EVENING.

   ..GRAMS.. 04/17/2015


   ATTN...WFO...FWD...OUN...SJT...LUB...MAF...

   LAT...LON   31860103 32930027 33799973 33979776 33839732 32989709
               32019733 31679761 31489857 31340042 31380056 31860103 

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Page last modified: April 17, 2015
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