ACUS11 KWNS 092207
SWOMCD
SPC MCD 092206=20 NYZ000-NJZ000-PAZ000-DEZ000-MDZ000-DCZ000-VAZ000-WVZ000-100000-

Mesoscale Discussion 2125
NWS Storm Prediction Center Norman OK
0506 PM CDT Sat Sep 09 2023

Areas affected...Middle Atlantic

Concerning...Severe Thunderstorm Watch 677...

Valid 092206Z - 100000Z

The severe weather threat for Severe Thunderstorm Watch 677
continues.

SUMMARY...Severe threat continues with robust convection this
evening.

DISCUSSION...Numerous showers/thunderstorms have developed over the
Middle Atlantic early this evening, especially from northern VA,
north across central/eastern PA arcing into southern New England.
Boundary layer has been overturned across the southern Middle
Atlantic with several pockets of modest buoyancy remaining from
central/eastern PA into CT. Latest radar imagery suggests a
longer-lived MCV over western NY, just south of lake Ontario, is
lifting northeast. It appears this feature is having some influence
on convection trailing south into central PA along the primary zone
of low-level confluence. Over the next few hours much of the greater instability should be overturned as widespread convection/clusters
coalesce over central/eastern PA. Locally damaging winds, along with
some hail remain possible until this air mass is overturned.

..Darrow.. 09/09/2023

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4Z3Zspa7PiQIGhCk2KLdECttQquOW4hBvyD4LdZJ7Q1C3ed62ozcZbb5yqiNeqKlHL-HJDdJf= Mqh-IchQAxw4f8LXAA$ for graphic product...

ATTN...WFO...OKX...ALY...PHI...BGM...CTP...LWX...

LAT...LON 38787851 42187735 42187382 38777519 38787851=20


=3D =3D =3D
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