• MESO: Mesoscale Discussion 1198

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, July 29, 2018 22:08:30
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    ACUS11 KWNS 292208
    SWOMCD
    SPC MCD 292207
    NEZ000-KSZ000-SDZ000-COZ000-WYZ000-292300-

    Mesoscale Discussion 1198
    NWS Storm Prediction Center Norman OK
    0507 PM CDT Sun Jul 29 2018

    Areas affected...Southwestern South Dakota...western Nebraska...and northwestern Kansas

    Concerning...Severe Thunderstorm Watch 322...323...

    Valid 292207Z - 292300Z

    The severe weather threat for Severe Thunderstorm Watch 322, 323
    continues.

    SUMMARY...The severe threat continues across WW 323.

    DISCUSSION...Scattered, mainly hail-producing thunderstorms are
    ongoing across northern portions of the Watch (southwestern South
    Dakota into northwestern Nebraska). A couple of significant severe
    hail instances have also been observed. The moderately unstable,
    yet strongly sheared environment in place across the WW will
    continue to support large (isolated significant) hail and damaging
    wind gusts throughout the evening. While low-level shear profiles
    aren't particularly impressive, weak low-level southeasterly flow
    beneath 50-60 kt west-northwesterly mid-level flow will support
    occasional updraft rotation and perhaps a brief tornado or two given
    favorable storm mode. Some upscale growth may also occur in the
    next 1-2 hours given convective trends and recent high-resolution
    model guidance. This which may also increase the damaging-wind
    threat over time.

    ..Cook.. 07/29/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...GID...LBF...DDC...UNR...GLD...BOU...CYS...

    LAT...LON 43820407 44080386 44330297 44290201 43880129 43210063
    42580039 41820030 41130022 40220014 39620003 39039999
    38580001 38460048 38330116 38460159 39170173 40040174
    40840202 42510287 43010345 43230401 43530423 43820407



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