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Mesoscale Discussion 239
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   Mesoscale Discussion 0239
   NWS Storm Prediction Center Norman OK
   0728 AM CST Wed Mar 01 2017

   Areas affected...Parts of middle/eastern TN...ern KY...sern OH...and
   WV...swrn VA

   Concerning...Severe Thunderstorm Watch 54...55...

   Valid 011328Z - 011500Z

   The severe weather threat for Severe Thunderstorm Watch 54, 55

   SUMMARY...Strong surface gusts and, perhaps, an isolated tornado or
   two will remain possible with a squall line overspreading the region
   through 15-17Z.

   DISCUSSION...The forward motion of the southern flank of the ongoing
   squall line has slowed some, but movement of the line as a whole
   still appears around 50 kt.  Activity likely will continue into and
   through the Cumberland Plateau region by 15-17Z.  Although the
   boundary layer air mass appears progressively less unstable with
   eastward extent across the Cumberland Plateau into the crest of the
   Appalachians, breaks in cloud cover could still allow for some
   boundary layer warming and destabilization prior to the arrival of
   the squall line.  Regardless, given the strength of the ambient
   lower/mid tropospheric flow (including 50-70 kt southwesterly around
   850 mb), the environment appears conducive to a continuing risk for
   potentially damaging surface gusts as the squall line overspreads
   the region.

   ..Kerr.. 03/01/2017


   LAT...LON   35228805 35688674 36338627 36858602 37198472 37978387
               38588331 39058141 38598026 37298112 36318302 35688446
               35268535 34898741 35228805 

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