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  • MESO: Mesoscale Discussion 2190

    From COD Weather Processor @1:2320/107 to All on Tue Sep 1 23:27:48 2026
    ACUS11 KWNS 012327
    SWOMCD
    SPC MCD 012326
    IAZ000-SDZ000-NEZ000-020130-

    Mesoscale Discussion 2190
    NWS Storm Prediction Center Norman OK
    0626 PM CDT Tue Sep 01 2026

    Areas affected...southeast SD and northeast NE

    Concerning...Severe Thunderstorm Watch 639...

    Valid 012326Z - 020130Z

    The severe weather threat for Severe Thunderstorm Watch 639
    continues.

    SUMMARY...Large hail greater than 2 inch diameter and severe wind
    gusts remain possible across Severe Thunderstorm Watch 639.
    Clustering/upscale growth could increase damaging wind potential
    over the next couple of hours.

    DISCUSSION...Isolated supercell storms have produce very large hail
    and severe wind gusts over the past 1-2 hours near the SD/NE border
    within Severe Thunderstorm Watch 639. Continued thunderstorm
    development along a low-level convergence zone is resulting in
    clustering this evening as convective mode becomes somewhat messier
    via storm interactions. Storms that can remain more discrete will
    likely remain supercells capable of producing very large hail and
    severe wind gusts. If sufficient clustering and consolidation of
    outflows occurs, a forward propagating bow or small MCS may develop
    in the next couple of hours on the northwest periphery of an
    developing southwesterly low-level jet across the Mid-MO Valley. If
    this occurs, damaging wind potential could increase across parts of
    southeast SD/northeast NE over the next couple of hours.

    ..Leitman.. 09/01/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fjg!6jD9YejY_HPsVeYtR-Kduj6RnTumH5ifBYKjmn9OPfMFXP-JkVyAHHwV0fEm-EFdcX85UmLdy1OpWe5WSNIK6Wyx-yE$ for graphic product...

    ATTN...WFO...FSD...OAX...LBF...

    LAT...LON 43459907 43789715 43689652 43289637 42719644 42299769
    42059926 42189969 42649965 43309936 43459907

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
    MOST PROBABLE PEAK WIND GUST...65-80 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


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    --- scorpsmtpd
    * Origin: capitolcityonline.net * KY, USA (1:2320/107)