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  • MESO: Mesoscale Discussion 1320

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Thu Jun 25 22:54:48 2026
    ACUS11 KWNS 252254
    SWOMCD
    SPC MCD 252254=20
    COZ000-NEZ000-WYZ000-260030-

    Mesoscale Discussion 1320
    NWS Storm Prediction Center Norman OK
    0554 PM CDT Thu Jun 25 2026

    Areas affected...Southeast Wyoming and adjacent counties of
    southwest Nebraska and northeast Colorado

    Concerning...Severe Thunderstorm Watch 391...

    Valid 252254Z - 260030Z

    The severe weather threat for Severe Thunderstorm Watch 391
    continues.

    SUMMARY...A convective band with a well formed cold pool will
    continue developing southeastward with occasional severe gusts into
    southeast Wyoming and adjacent counties in Nebraska/Colorado.

    DISCUSSION...Over the past few hours convection has evolved into a
    well formed leading convective band/trailing stratiform rain
    configuration, and wind profiles are helping maintain updrafts along
    the gust front. The storms will likely persist for another 2-3
    hours while moving southeastward across southeast WY where slightly
    warmer temperatures/moisture persist at relatively high elevation,
    compared to cooler temperatures farther east at lower elevation into
    the NE Panhandle. Occasional severe outflow gusts of 60-70 mph will
    be the main threats through 01z. While eastward progress of the
    stronger storms will be limited by weakening buoyancy with eastward
    extent into NE, the storms could persist into parts of
    north/northeast CO with a low-end severe wind threat through about
    03z. Since the potential area affected outside of the existing
    watch in WY) is small, the need for a downstream watch is not clear.

    ..Thompson.. 06/25/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-pjJKI3AC3ReHmiIOeFgA9kWPwEDiYDR0_UbgzB6SlwQ5Rsc98mJybbE3mp-AcsrHTxF2J1RN= TDxikb8Tdi1hZcaIu8$ for graphic product...

    ATTN...WFO...BOU...CYS...

    LAT...LON 41910399 41470344 40650353 40450420 40570509 41240585
    41510590 41900531 42390494 42630477 42630440 41910399=20

    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


    =3D =3D =3D
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