• MESO: Mesoscale Discussion 1520

    From COD Weather Processor@1:2320/127 to wx-storm@lists.illinois.edu on Mon Jul 6 02:39:06 2026
    ACUS11 KWNS 060238
    SWOMCD
    SPC MCD 060238=20
    NDZ000-060415-

    Mesoscale Discussion 1520
    NWS Storm Prediction Center Norman OK
    0938 PM CDT Sun Jul 05 2026

    Areas affected...Western North Dakota

    Concerning...Severe Thunderstorm Watch 464...

    Valid 060238Z - 060415Z

    The severe weather threat for Severe Thunderstorm Watch 464
    continues.

    SUMMARY...The potential for isolated severe hail and wind gusts will
    persist through 04 UTC, but the overall threat should steadily
    diminish with time.

    DISCUSSION...Convection has struggled to maintain intensity over the
    past couple of hours across western ND, and continuous convective
    overturning has been gradually eroding MLCAPE based on mesoanalysis
    estimates. Despite this, a few stronger updrafts continue to briefly
    intensify to severe limits based on MRMS MESH estimates.
    Additionally, at least isolated severe wind gusts have been observed
    with some of the collapsing convection. Richer low-level moisture
    along and north of Highway 23 has maintained some degree of
    buoyancy, which may continue to allow occasional/isolated strong to
    severe thunderstorms over the next couple of hours. However,
    continued overturning and nocturnal stabilization should further
    diminish buoyancy and steadily reduce the potential for severe
    convection. Temporal extension of WW 464 beyond the scheduled 04 UTC
    expiration will likely not be needed.

    ..Moore.. 07/06/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7IzWdZKQNEFQZIRLFhOW6qWwZ_U_TJf4Ui7ZddBYlEQpG1VvLQzshX2bQwS_Bwu7Ugf_eeGIW= KWpO2rX3BZ3oX9i9yo$ for graphic product...

    ATTN...WFO...BIS...

    LAT...LON 47440325 48420210 48740160 48810105 48720067 48380032
    48110029 46880185 46780251 46860295 47150327 47440325=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 Weather Station (1:2320/127)