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  • MESO: Mesoscale Discussion 1828

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jul 29 02:41:12 2025
    ACUS11 KWNS 290239
    SWOMCD
    SPC MCD 290239=20
    IAZ000-MNZ000-NEZ000-SDZ000-290445-

    Mesoscale Discussion 1828
    NWS Storm Prediction Center Norman OK
    0939 PM CDT Mon Jul 28 2025

    Areas affected...Southern Minnesota...Far Southeast South
    Dakota...Far Northeast Nebraska...Iowa

    Concerning...Severe Thunderstorm Watch 553...554...

    Valid 290239Z - 290445Z

    The severe weather threat for Severe Thunderstorm Watch 553, 554
    continues.

    SUMMARY...A severe threat will likely continue across southern
    Minnesota and northwest Iowa over the next couple of hours. Severe
    gusts and hail will be the primary threats. Gusts over 85 mph will
    be possible. Weather watch issuance will be needed soon.

    DISCUSSION...The latest mosaic radar imagery shows an MCS from
    south-central Minnesota extending southwestward into far northwest
    Iowa. The strongest part of the MCS is located between Sioux Falls
    and Sioux City, where indications suggest that a cold pool is
    starting to organize. From this part of the MCS, a bowing line
    segment is expected to continue forming, moving southeastward along
    a sharp gradient of strong instability. This severe line segment
    should affect parts of northwest and central Iowa over the next few
    hours. Along the track of this severe linear MCS, widespread
    damaging wind gusts may occur, with the strongest wind gusts near
    the apex of the bowing line segment. Significant wind gusts will be
    likely.

    ..Broyles.. 07/29/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7Wvw6juNZLA-e4z-xK43E7yp0V4gpUtnoR9sFfVfwvX4DDZOj7rkr_bmBLuQ9O7h8i5kiwhPk= HZxneGznIX1Qkt4XIY$ for graphic product...

    ATTN...WFO...DVN...ARX...MPX...DMX...FSD...OAX...

    LAT...LON 44039219 44299352 44289496 43909652 43229708 42659717
    42299655 41649470 41349367 41369279 41989222 43169187
    44039219=20

    MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH
    MOST PROBABLE PEAK WIND GUST...85-100 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


    =3D =3D =3D
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