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  • MESO: Mesoscale Discussion 0887

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat May 27 22:49:29 2023
    ACUS11 KWNS 272249
    SWOMCD
    SPC MCD 272248=20
    SDZ000-NEZ000-COZ000-NDZ000-MTZ000-WYZ000-280015-

    Mesoscale Discussion 0887
    NWS Storm Prediction Center Norman OK
    0548 PM CDT Sat May 27 2023

    Areas affected...Parts of central/northern High Plains

    Concerning...Severe Thunderstorm Watch 245...

    Valid 272248Z - 280015Z

    The severe weather threat for Severe Thunderstorm Watch 245
    continues.

    SUMMARY...Convection continues within the central/northern High
    Plains. Damaging winds and large hail are the main hazards. A
    locally more favorable zone for a brief tornado will exist in
    southeast Wyoming, adjacent northeast Colorado, and the Nebraska
    Panhandle.

    DISCUSSION...Scattered convection within the High Plains surface
    trough continues to the east. Eastward progression has generally
    been slow on account of upper-level winds being largely parallel to
    the trough. This is particularly the case for east-central Nebraska
    into Western South Dakota and adjacent Montana. Given all the
    storm/cold-pool interactions, damaging winds will likely be the
    primary threat. However, initial updraft pulses would pose some
    threat for large hail.

    For parts of northeast Colorado, southeast Wyoming, and the Nebraska
    Panhandle, deep-layer shear is more perpendicular to the boundary
    and surface winds are backed to southeasterly. This setup will allow
    more broken line mode. Recent satellite/radar imagery also shows
    development of isolated storms near the WY/NE border. Damaging winds
    and large hail will remain a risk in these areas. Additionally, the
    local environment will be modestly more favorable for a brief
    tornado.

    ..Wendt.. 05/27/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8RTQaVZZEVCakT9RfnIqIiZrnZksGuL9Bchu6C1zMNGEyobnP_ZD92nOBzFsWHQ3rj-rjy50f= JEvkqPN56TvLp5ieNg$ for graphic product...

    ATTN...WFO...BIS...UNR...BOU...CYS...BYZ...

    LAT...LON 40090456 41050509 43370508 44830495 45830487 46200419
    46190380 46040346 42600296 40760326 40090378 40010422
    40090456=20


    =3D =3D =3D
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