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Mesoscale Discussion 1203
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   Mesoscale Discussion 1203
   NWS Storm Prediction Center Norman OK
   0627 PM CDT Fri Jun 30 2017

   Areas affected...Cental Oklahoma...northwest Texas...and
   west-central Arkansas

   Concerning...Severe Thunderstorm Watch 386...

   Valid 302327Z - 010100Z

   The severe weather threat for Severe Thunderstorm Watch 386
   continues.

   SUMMARY...Thunderstorms will continue to develop/expand in coverage
   through the evening. Large hail and damaging thunderstorm winds will
   be the primary threat in the near-term, with an eventual transition
   to thunderstorm winds later this evening.

   DISCUSSION...Thunderstorms continue to develop along and near an
   outflow boundary draped from northwest Texas, across southwest
   Oklahoma, and into west-central Arkansas. To the south of this
   boundary, a sheared, very unstable airmass remains in place, with
   most-unstable CAPE values between 2500-4000 J/kg and deep-layer
   shear on the order of 45 knots. This environment will maintain
   thunderstorm organization and support large hail (locally in excess
   of 2") through the evening. 

   With time, thunderstorms should grow upscale into one or more bowing
   clusters. As this convective evolution occurs, a transition from
   large hail and damaging thunderstorm winds to predominantly damaging
   thunderstorm winds should occur.

   ..Marsh.. 06/30/2017

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

   ATTN...WFO...LZK...SHV...TSA...FWD...OUN...LUB...AMA...

   LAT...LON   33409862 33409998 33840005 34000005 34110005 34220005
               35410000 36419600 36419587 36419579 36159455 35779369
               35729369 35589369 35569369 35389370 35389370 34509445
               33939516 33869529 33689633 33409841 33409862 33409862
               33409862 

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