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Mesoscale Discussion 1143
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   Mesoscale Discussion 1143
   NWS Storm Prediction Center Norman OK
   0726 PM CDT Fri Jun 23 2017

   Areas affected...Southern AR...Far northeast TX...Far northern LA

   Concerning...Severe Thunderstorm Watch 367...

   Valid 240026Z - 240230Z

   The severe weather threat for Severe Thunderstorm Watch 367
   continues.

   SUMMARY...Some isolated damaging wind gusts are possible for the
   next few hours across southern AR and adjacent far northeast TX and
   far northern LA . Anticipated limited and marginal nature of the
   severe threat is expected to preclude the need for a downstream
   watch.

   DISCUSSION...Mesoscale convective system which has moved through AR
   over the last several hours continues southward/southeastward into
   southern AR and far northwest MS. Eastern portion of the system has
   weakened considerably over the past hour as encountered the cloudy
   and less unstable airmass over western TN and northwest MS. Western
   portion of the system continues to forward propagate
   southward/southwestward into the warm and unstable airmass of
   south-central/southwest AR. Weak shear has prevent much organization
   along this portion of the MCS with radar and satellite confirming
   the outflow-dominant storm structures. This weakly organized,
   outflow-dominant forward-propagation is expected to continue for at
   least the next few hours as the downstream airmass remains
   supportive of surface-based convection. Some isolated damaging wind
   gusts are possible with these storms but the limited and marginal
   nature of any severe threat precludes the need for a downstream
   watch.

   ..Mosier.. 06/24/2017

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

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

   LAT...LON   33879451 34129386 33809254 33569096 32709203 32979427
               33879451 

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