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  • MESO: Mesoscale Discussion 2111

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Sep 8 20:52:50 2023
    ACUS11 KWNS 082052
    SWOMCD
    SPC MCD 082052=20 MEZ000-NHZ000-MAZ000-NYZ000-CTZ000-VTZ000-NJZ000-PAZ000-082215-

    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 https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9W9duLok9JjIuXlJgHHGDul5ehbkoKH_Vw33x4UG235_kZPiZK5sNXzoDCJdO5HF2u8x4rZ1n= j8aQn3MBLMa00g7ATY$ 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=20


    =3D =3D =3D
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