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Mesoscale Discussion 576
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   MESOSCALE DISCUSSION 0576
   NWS STORM PREDICTION CENTER NORMAN OK
   0846 PM CDT SAT MAY 09 2015

   AREAS AFFECTED...SRN AR

   CONCERNING...TORNADO WATCH 151...

   VALID 100146Z - 100245Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 151 CONTINUES.

   SUMMARY...CLUSTER OF STRONG TO LOCALLY SEVERE STORMS SHOULD
   GRADUALLY WANE OVER SRN AR. ALTHOUGH AN ISOLATED DAMAGING WIND/BRIEF
   TORNADO RISK MAY PERSIST BEYOND 03Z WW EXPIRATION...A REPLACEMENT WW
   IS NOT ANTICIPATED.

   DISCUSSION...STRONGEST STORMS WITHIN WW 151 HAVE PERSISTED OVER SWRN
   AR N OF THE LARGE-SCALE CONVECTIVE OUTFLOW BOUNDARY THAT EXTENDS
   FROM SERN AR TO NEAR THE ARKLATEX BORDER REGION. LOW-LEVEL WINDS
   HAVE NOCTURNALLY INCREASED PER SHV/LZK VWP DATA AND WAA ATOP THE
   CONVECTIVE OUTFLOW SHOULD MAINTAIN TSTMS THROUGH AT LEAST MIDNIGHT.
   HOWEVER...00Z SHV RAOB WAS NOT PARTICULARLY UNSTABLE WITH MEAN
   MIXING RATIOS ONLY AROUND 12-13 G/KG. AS SUCH...OVERALL CONVECTIVE
   INTENSITY WILL PROBABLY WANE SUGGESTING THE RISK FOR DAMAGING WINDS
   AND A BRIEF TORNADO WILL SUBSIDE THROUGH LATE EVENING.

   ..GRAMS.. 05/10/2015


   ATTN...WFO...LZK...SHV...

   LAT...LON   33899365 34309320 34549272 34619225 34309164 33989171
               33699198 33439241 33249281 33169305 33179335 33279365
               33569388 33899365 

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Page last modified: May 10, 2015
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