• MESO: Mesoscale Discussion 1139

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Sunday, June 14, 2026 18:08:52
    ACUS11 KWNS 141808
    SWOMCD
    SPC MCD 141808=20
    NCZ000-SCZ000-GAZ000-142015-

    Mesoscale Discussion 1139
    NWS Storm Prediction Center Norman OK
    0108 PM CDT Sun Jun 14 2026

    Areas affected...portions of the Southeast/Mid-Atlantic coast

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

    Valid 141808Z - 142015Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Widely scattered thunderstorms will pose a risk for
    isolated damaging downburst wind gusts.

    DISCUSSION...Isolated to widely scattered thunderstorms have
    developed along and inland of the Atlantic Coast sea breeze across
    portions of coastal GA/SC/NC as of 18 UTC. Compared to areas farther
    inland, modestly greater low-level moisture dewpoints in the
    low-to-mid 70s are contributing to greater instability, with MLCAPE
    of 1500-2500 J/kg analyzed via latest objective analysis; although,
    a lingering warm layer sampled around 500 mb by the 12z MHX/CHS
    observed soundings may temper overall convective intensity. Weak
    effective shear (less than 20-25 kts) will also tend to limit
    overall updraft organization; however, high PWAT contents and
    steepening low-level lapse rates will support some potential for
    water-loaded downbursts, with occasionally damaging wind gusts
    possible. An instance or two of small hail may also occur with the
    most robust cores. Watch issuance appears unlikely at this time
    owing to the limited potential for convective organization and
    isolated nature of the severe threat.

    ..Chalmers/Mosier.. 06/14/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7WOB7q5yX5Pzzk4i9vUk-v3Sc3dCsiZuY3ZWE1qOsqpg0z5zniEq-RJusteJleOsu8XouYTxW= jEMKvRCdwAP6utVsNg$ for graphic product...

    ATTN...WFO...MHX...RAH...ILM...CHS...CAE...JAX...FFC...

    LAT...LON 32348213 33178135 33868040 34287982 35137866 35537810
    35777734 35807692 35827634 35757605 35587590 35247594
    34827625 34467663 33767797 32967934 31658096 30978134
    30818169 30868224 31218239 31618238 32348213=20

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


    =3D =3D =3D
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    * Origin: Capitol City Online (1:2320/107)