• MESO: Mesoscale Discussion 1258

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jun 25 19:55:18 2023
    ACUS11 KWNS 251955
    SWOMCD
    SPC MCD 251954=20
    NCZ000-GAZ000-TNZ000-ALZ000-252100-

    Mesoscale Discussion 1258
    NWS Storm Prediction Center Norman OK
    0254 PM CDT Sun Jun 25 2023

    Areas affected...portions of middle and southern Tennessee into
    northern Alabama and northwest Georgia

    Concerning...Severe Thunderstorm Watch 376...377...

    Valid 251954Z - 252100Z

    The severe weather threat for Severe Thunderstorm Watch 376, 377
    continues.

    SUMMARY...The severe threat continues across Severe Thunderstorm
    Watch 376 into 377. Large hail remains the main threat with the more
    discrete storms, with damaging gusts the biggest concern with a southward-sagging MCS.

    DISCUSSION...An MCS with a history of damaging gusts continues to
    propagate southward in middle/eastern TN toward GA, while more
    discrete convection southwest of the MCS has produced multiple
    instances of 1-2 inch hail in the last few hours. Though deep-layer
    and low-level shear remains weak across the warm sector, 7+ C/km
    surface-500 mb lapse rates and rich low-level moisture will continue
    to support severe potential ahead of the aforementioned MCS and
    transient supercells along its flank to the southwest. Large hail
    remain the main threat with the transient supercells, with damaging
    gusts likely continuing along the leading edge of the MCS.

    ..Squitieri/Grams.. 06/25/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7_ZUZhj1s7fe6wxzYusSXgSWtI9-0UEenoIuSon8r4byZDMJ0YqquPFeitEJKtAUbEydpVnWk= wlHXHly_FtT_awNLaY$ for graphic product...

    ATTN...WFO...GSP...MRX...FFC...OHX...BMX...HUN...

    LAT...LON 33868758 35248657 36018583 35748445 35408383 34938384
    34308438 33658516 33448597 33258656 33318707 33868758=20


    =3D =3D =3D
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