• MESO: Mesoscale Discussion 1029

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jun 14 08:08:24 2023
    ACUS11 KWNS 140808
    SWOMCD
    SPC MCD 140807=20
    GAZ000-ALZ000-MSZ000-141000-

    Mesoscale Discussion 1029
    NWS Storm Prediction Center Norman OK
    0307 AM CDT Wed Jun 14 2023

    Areas affected...Parts of east-central MS...central
    AL...west-central GA

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

    Valid 140807Z - 141000Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Some hail threat may develop through the early morning.
    Watch issuance is currently considered unlikely, but will be
    reevaluated depending on short-term convective trends.

    DISCUSSION...Elevated convection has recently developed from extreme east-central MS into central AL, within a warm advection regime
    associated with a modest southwesterly low-level jet. Rich low-level
    moisture and modestly steep midlevel lapse rates are supporting
    MUCAPE of 1500-2500 J/kg across the region, sufficient for vigorous
    updrafts. Strong mid/upper-level flow is supporting effective shear
    of 40-50 kt, sufficient for organized convection, and a few cells
    have exhibited marginal supercell characteristics.

    Coverage of the severe threat remains uncertain early this morning,
    with the potential for multiple storm mergers and a complex
    convective mode, given the number of storms that have recently
    developed. However, any elevated supercells that remain somewhat
    discrete could pose a large hail threat through the early morning as
    they move east to east-southeastward. A near-surface inversion will
    tend to limit severe-wind potential, though locally damaging gusts
    cannot be ruled out, especially if any organized clustering occurs
    later this morning.=20

    The severe threat may remain rather isolated, and watch issuance is
    currently considered unlikely. However, this will be reevaluated if
    short-term trends support the potential for multiple mature
    supercells emerging out of the ongoing convection later this
    morning.

    ..Dean/Guyer.. 06/14/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9vwXW7aABGCh2evHg3AZ-v7qp4kP9ma3D6aHkkVizfeT_Y_mq-4KoDRMqZgXS6iH4sY27bsKH= r9oPpLtAD1eQZwDF-s$ for graphic product...

    ATTN...WFO...FFC...TAE...BMX...JAN...

    LAT...LON 33578844 33428721 33078564 32608435 32198422 31928519
    32088601 32458730 32758816 33198866 33578844=20


    =3D =3D =3D
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