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Mesoscale Discussion 1762
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   Mesoscale Discussion 1762
   NWS Storm Prediction Center Norman OK
   0606 PM CST Sun Nov 05 2017

   Areas affected...extreme eastern Ohio through western Pennsylvania

   Concerning...Severe Thunderstorm Watch 514...

   Valid 060006Z - 060130Z

   The severe weather threat for Severe Thunderstorm Watch 514
   continues.

   SUMMARY...Line of strong to severe storms should persist until
   around 02Z into western PA followed by a rapid decrease in
   intensity. Damaging wind remains the primary threat, but a brief
   tornado cannot be ruled out. Additional downstream counties may be
   added to the watch in the Pittsburg forecast area, but an additional
   WW is not anticipated at this time.

   DISCUSSION...Early this evening a line of strong to severe storms
   extends along the OH/PA border moving east near 50 kt. The line is
   embedded within very strong wind profiles with large 0-2 km
   hodographs and 50+ kt effective bulk shear. Occasional bowing
   segments and meso-vortices continue to be observed, and the threat
   for damaging wind will persist next couple hours through western PA.
   However, surface analysis shows a rapid decrease in theta-e across
   central PA where temperatures are only in the 50s F. The fast line
   movement will outpace any boundary layer recovery associated with
   the southwesterly low-level jet. Therefore this activity will likely
   undergo a rapid decrease in intensity by 02Z as it approaches
   central PA.

   ..Dial.. 11/06/2017

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...CTP...PBZ...CLE...

   LAT...LON   40738049 41428018 41877951 41667891 40757881 40227914
               40007983 40048097 40738049 

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Page last modified: November 06, 2017
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