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Mesoscale Discussion 1338
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MD 1338 graphic

   Mesoscale Discussion 1338
   NWS Storm Prediction Center Norman OK
   0131 PM CDT Tue Jul 18 2017

   Areas affected...Central Maryland southwestward through western
   Virginia...eastern West Virginia...western North Carolina...and far
   eastern Tennessee

   Concerning...Severe potential...Watch unlikely 

   Valid 181831Z - 181930Z

   Probability of Watch Issuance...5 percent

   SUMMARY...Sporadic damaging wind gusts and isolated hail may occur
   near the strongest activity.  A WW is not anticipated for this

   DISCUSSION...Scattered convection has intensified across the
   discussion area over the past 30 minutes to 1 hour.  These storms
   have developed mostly along higher terrain/ridgelines, where
   insolation/surface warming amidst 60s to low 70s F dewpoints have
   fostered moderate to strong destabilization this afternoon. 
   Low/mid-level wind fields are very weak - generally leading to
   short-lived 'pulse' thunderstorms.  These storms may result in a
   threat for isolated damaging wind gusts and hail into the evening
   hours before nocturnal surface cooling leads to a downward trend in
   convective intensity.  A WW issuance is not anticipated.

   ..Cook.. 07/18/2017

   ...Please see for graphic product...


   LAT...LON   39407859 39587815 39727732 39697684 39537648 39237668
               38567756 37977816 37207879 36287993 35818075 35358195
               35218257 35398323 35818328 36178309 36948210 37888061
               38907926 39407859 

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