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Mesoscale Discussion 220
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   Mesoscale Discussion 0220
   NWS Storm Prediction Center Norman OK
   0100 AM CDT Wed Apr 04 2018

   Areas affected...Eastern Alabama...Northwest Georgia...Eastern
   Tennessee...Western North Carolina...Far Western Virginia

   Concerning...Severe Thunderstorm Watch 34...35...

   Valid 040600Z - 040745Z


   The severe weather threat for Severe Thunderstorm Watch 34, 35

   SUMMARY...A severe threat for wind damage and hail will likely
   continue for a few more hours with the stronger parts of a line
   moving through the southern and central Appalachians. Additional WW
   issuance will likely not be needed. Any lingering severe threat can
   be handled by a local extension.

   DISCUSSION...Latest radar imagery shows a squall line from eastern
   Kentucky extending south-southwestward across eastern Tennessee into
   far northwest Georgia and central Alabama. The strongest instability
   is located ahead of the southern part of the line where MLCAPE
   values are between 500 and 1000 J/kg as evidenced by the 05Z
   Birmingham sounding. For this reason, the line may retain a marginal
   wind-damage threat for a few more hours as it moves eastward across
   eastern Alabama, northwestern Georgia and eastern Tennessee.
   Locations just to the east of the watch may need to a local
   extension in area and time issued.

   On the northern part of the line, instability is very weak across
   western Virginia. Although a marginal wind-damage threat could
   linger, this part of the line should weaken quickly as it moves into
   the higher terrain of the central Appalachians.

   ..Broyles/Edwards.. 04/04/2018

   ...Please see for graphic product...


   LAT...LON   32328591 32208638 32288686 32508710 32918688 33378625
               33888565 35108478 36648326 36858267 36648214 36088206
               34328361 32858501 32328591 

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