• MESO: Mesoscale Discussion 1668

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jul 17 18:20:58 2024
    ACUS11 KWNS 171820
    SWOMCD
    SPC MCD 171820=20
    NEZ000-SDZ000-COZ000-WYZ000-172015-

    Mesoscale Discussion 1668
    NWS Storm Prediction Center Norman OK
    0120 PM CDT Wed Jul 17 2024

    Areas affected...Eastern CO/WY...southwest SD...NE Panhandle

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

    Valid 171820Z - 172015Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Isolated severe storms are possible this afternoon.

    DISCUSSION...Thunderstorms have developed early this afternoon from
    southeast WY into southwest SD, the NE Panhandle, and eastern CO,
    with severe hail recently reported over Niobrara County, WY. Despite
    the relatively early time of day, diminishing MLCINH could support
    continued storm development through mid afternoon. Relatively rich
    low-level moisture has spread into parts of southeast WY and the NE
    Panhandle, which is supporting MLCAPE of 1500-2000 J/kg, with
    somewhat lesser buoyancy noted into parts of the CO Front Range.
    Modest northwesterly flow aloft will support some potential for
    storm organization, and a few stronger multicells and perhaps a
    supercell or two are possible, with a threat of isolated hail and
    localized severe gusts.=20

    With the threat expected to remain rather isolated through mid
    afternoon, short-term watch issuance is considered unlikely. Watch
    issuance is still possible at some point later this afternoon, if
    observational trends support an increasing coverage of discrete
    cells, and/or some indication of more organized clustering and
    incipient upscale growth.

    ..Dean/Hart.. 07/17/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4RgXaE8THxWt_rcNfLw19ipvRawxvTOZ-F4LKvKg2I-QfjWpFhJv3TmC3S6g7NJlYWb-UjIjE= NHRdRSVN0aBwoHdQTQ$ for graphic product...

    ATTN...WFO...LBF...UNR...GLD...PUB...BOU...CYS...

    LAT...LON 43500582 43910556 44020400 43800258 43170229 41570203
    38260263 38080417 38790500 39650531 40620552 41430573
    42480605 42940606 43500582=20


    =3D =3D =3D
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