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Mesoscale Discussion 882
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   Mesoscale Discussion 0882
   NWS Storm Prediction Center Norman OK
   0800 PM CDT Sat May 27 2017

   Areas affected...southeastern VA and eastern NC

   Concerning...Severe Thunderstorm Watch 278...

   Valid 280100Z - 280130Z

   The severe weather threat for Severe Thunderstorm Watch 278

   SUMMARY...A marginally severe hail risk will likely persist beyond
   the 02Z watch expiration time.  A local watch extension-in-time
   (EXT) will probably best address the remaining severe risk.

   DISCUSSION...Radar mosaic shows a cluster of strong to severe
   thunderstorms over southeastern VA and into far northeastern NC. 
   The 00Z MHX raob exhibited a very steep 700-500 lapse rate (8
   degrees C/km) with a deep-layer shear profile supportive of
   continued storm organization (44-kt effective shear).  The moisture
   rich airmass over the coastal plain will be slow to cool this
   evening with moderate buoyancy likely persisting for a few more
   hours (MUCAPE 1500-2500 J/kg).  As such, a transient
   supercell/organized multicellular storm mode will tend to at least
   have an accompanying marginally severe hail risk and perhaps a
   localized wind damage threat for the next few hours.

   ..Smith.. 05/28/2017

   ...Please see for graphic product...


   LAT...LON   35627756 37287817 37007668 36277583 35597556 35117583
               35137652 35627756 

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