• MESO: Mesoscale Discussion 1591

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jul 7 18:28:31 2025
    ACUS11 KWNS 071828
    SWOMCD
    SPC MCD 071827=20
    TNZ000-KYZ000-GAZ000-ALZ000-MSZ000-ARZ000-072030-

    Mesoscale Discussion 1591
    NWS Storm Prediction Center Norman OK
    0127 PM CDT Mon Jul 07 2025

    Areas affected...Eastern Arkansas into the Middle Tennessee

    Concerning...Severe potential...Watch unlikely=20

    Valid 071827Z - 072030Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Scattered thunderstorms will continue to move to the
    southeast through the afternoon with an attendant threat for
    sporadic damaging gusts. Watch issuance is not expected.

    DISCUSSION...Over the past couple of hours, scattered thunderstorms
    have developed within a weak confluence/differential heating zone in
    place from eastern AR to Middle TN. Recent vertically integrated
    liquid imagery shows several deeper convective cores developing as
    daytime heating drives MLCAPE values into the 1000-1500 J/kg range.
    Regional VWPs are all sampling very weak winds throughout the
    column, suggesting that storm longevity, organization, and the
    overall severe threat will likely be very limited. Consequently,
    watch issuance is not expected; however, low-level lapse rates are
    increasing to around 8 C/km ahead of the convective band, coupled
    with the high-water content of the air mass (PWATs between 1.75 to 2
    inches), will promote strong downward accelerations of water-loaded
    downdrafts. As such, a few sporadic strong to severe gusts (most
    likely 45-60 mph) will be possible as storms migrate southeast into
    the axis of higher moisture/MLCAPE.

    ..Moore/Hart.. 07/07/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-LZSZ_Rc2DZa3J_Syqo3OPgc4xAnvg-W9JvtsmMOuhFadtt4J5Bv-KlDM8QEKUmL00p_p_XxP= KLn64yYG4cUc8sSTFc$ for graphic product...

    ATTN...WFO...MRX...FFC...LMK...OHX...HUN...MEG...JAN...LZK...

    LAT...LON 34889167 35059123 35199063 35239012 35318926 35398895
    35628849 35988766 36438683 36608643 36768607 36788586
    36768543 36658515 36528483 36278467 35928467 35548484
    35258515 34988555 34848602 34688657 34538704 34358789
    34059007 34089091 34189126 34329153 34449168 34629176
    34889167=20

    MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH


    =3D =3D =3D
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