MD 2111 CONCERNING SEVERE THUNDERSTORM WATCH 674…675… FOR PORTIONS OF THE COASTAL MID-ATLANTIC INTO NEW ENGLAND
Mesoscale Discussion 2111
NWS Storm Prediction Center Norman OK
0352 PM CDT Fri Sep 08 2023
Areas affected…Portions of the coastal Mid-Atlantic into New
England
Concerning…Severe Thunderstorm Watch 674…675…
Valid 082052Z – 082215Z
The severe weather threat for Severe Thunderstorm Watch 674, 675
continues.
SUMMARY…The greatest risk for damaging winds in the next 1-2 hours
should exist with multiple storm clusters moving northeastward.
DISCUSSION…Thunderstorm coverage has increased across eastern PA,
NJ, southern NY, and parts of New England along/near a weak front.
Ample low-level moisture, moderate to locally strong MLCAPE, and
steep low-level lapse rates are all aiding efficient downdraft
momentum and strong/gusty winds, with occasional measured severe
wind gusts noted. Even though deep-layer shear remains fairly
modest, around 25-35 kt of southwesterly mid-level flow is aiding
northeastward movement of multiple small thunderstorm clusters from
the coastal Mid-Atlantic into southern New England. Scattered
damaging winds should continue to be the main threat with this
activity given the favorable thermodynamic environment, but isolated
hail may also occur with any stronger updrafts that can remain
semi-discrete.
..Gleason/Guyer.. 09/08/2023
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…GYX…BOX…BTV…OKX…ALY…PHI…BGM…
LAT…LON 40437569 43027384 43227245 43717178 44156995 43586959
42647206 41627279 40037430 39817536 40437569
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