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Mesoscale Discussion 972
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   Mesoscale Discussion 0972
   NWS Storm Prediction Center Norman OK
   0938 PM CDT Thu Jun 08 2017

   Areas affected...Portions of the TX Panhandle into west TX

   Concerning...Severe Thunderstorm Watch 308...

   Valid 090238Z - 090345Z

   The severe weather threat for Severe Thunderstorm Watch 308
   continues.

   SUMMARY...A severe supercell thunderstorm moving southward across
   Randall County TX remains the primary threat for large hail and
   damaging winds across WW 308.

   DISCUSSION...A long-lived supercell with a history of producing 1-2+
   inch hail and 60-70 mph measured wind gusts across Amarillo TX and
   vicinity continues southward across Randall and towards Swisher
   County TX as of 0230Z. An arcing line of thunderstorms has formed
   east of this supercell across the TX Panhandle within a narrow
   corridor of greater low-level moisture per latest surface
   observations. This line of convection may also pose an isolated
   damaging wind/large hail threat as it moves south of the TX
   Panhandle over the next several hours. The airmass to the south of
   ongoing activity remains favorable for maintenance of thunderstorm
   updraft intensity and organization in the short term, with MLCAPE
   generally ranging 500-1500 J/kg, and effective bulk shear values of
   35-45 kt. Over the next few hours, the loss of diurnal heating
   should weaken instability and increase convective inhibition, with a
   slow weakening trend in convection expected through late evening.

   ..Gleason.. 06/09/2017

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...LUB...AMA...

   LAT...LON   34590302 33860300 33860009 35190004 35170189 34590302 

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