|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
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
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 40738049 41428018 41877951 41667891 40757881 40227914
40007983 40048097 40738049
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