• MESO: Mesoscale Discussion 1118

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Sat Jun 13 13:03:50 2026
    ACUS11 KWNS 131303
    SWOMCD
    SPC MCD 131303=20
    MOZ000-IAZ000-KSZ000-NEZ000-131500-

    Mesoscale Discussion 1118
    NWS Storm Prediction Center Norman OK
    0803 AM CDT Sat Jun 13 2026

    Areas affected...Southeast Nebraska...Southwest Iowa...Far Northwest
    Missouri

    Concerning...Severe Thunderstorm Watch 325...

    Valid 131303Z - 131500Z

    The severe weather threat for Severe Thunderstorm Watch 325
    continues.

    SUMMARY...A threat for isolated large hail and severe wind gusts
    will likely continue over the next couple of hours from southeast
    Nebraska into southwest Iowa and far northwest Missouri. As the
    storms move toward the edge of Watch 325, additional watch issuance
    will likely need to be considered.

    DISCUSSION...The latest high-resolution radar imagery shows a strong
    line segment ongoing to the west of Omaha. The line is located at
    the northern end of a pocket of moderate instability, analyzed by
    the RAP from northeastern Kansas into southeastern Nebraska. MLCAPE
    within this corridor is estimated to be in the 2000 to 2500 J/kg
    range. In addition, the RAP shows a plume of steep mid-level lapse
    rates (in the 7.5 to 8.5 C/km range) extending eastward from
    northwest Kansas into southeast Nebraska. This environment will
    continue to support an isolated large hail threat this morning. In
    addition, a potential will exist for isolated severe gusts, and this
    threat could increase if the line can become more organized. The
    threat may tend to move more southeastward into far northwest
    Missouri, favoring the eastern edge of the stronger instability.

    ..Broyles.. 06/13/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-Z876iLJDVf4NVaV9-mtJsSgCdQXODC35BYlvRG3aYsdBrTU1sAH_F6qE9eQWO728d-J4GIzp= yEZPixfptJ2APTsLHQ$ for graphic product...

    ATTN...WFO...DMX...EAX...OAX...TOP...GID...

    LAT...LON 39719507 39909595 40139664 40529748 40929764 41199757
    41619716 41799659 41789623 41339522 40869438 40539401
    40039408 39739451 39719507=20

    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


    =3D =3D =3D
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    * Origin: Capitol City Online (1:2320/107)