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Mesoscale Discussion 861
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   Mesoscale Discussion 0861
   NWS Storm Prediction Center Norman OK
   0913 AM CDT Sat May 27 2017

   Areas affected...Tennessee...adjacent southern Kentucky

   Concerning...Severe Thunderstorm Watch 274...

   Valid 271413Z - 271545Z

   The severe weather threat for Severe Thunderstorm Watch 274

   SUMMARY...Lingering thunderstorm activity is expected to continue
   developing east of severe thunderstorm watch 274.  A new watch is
   not anticipated in the near term, but trends will be monitored.

   DISCUSSION...Scattered ongoing thunderstorm activity appears largely
   supported by mid/upper forcing for ascent associated with a weak
   short wave impulse within the subtropical westerlies.  As this
   feature (and an associated 50 kt 500 mb jet streak) continues east
   northeastward toward the central/southern Appalachians through early
   afternoon, it probably will contribute to weakening of inhibition
   associated with elevated mixed layer now present across the
   Tennessee Valley.  However, until more substantive boundary layer
   heating/mixing occurs across this region, any potential for
   substantive re-intensification of thunderstorm development seems

   ..Kerr.. 05/27/2017

   ...Please see for graphic product...


   LAT...LON   36678792 37228604 37068331 35518429 34788682 35198923

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