• MESO: Mesoscale Discussion 1891

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Aug 5 22:12:48 2025
    ACUS11 KWNS 052212
    SWOMCD
    SPC MCD 052212=20
    OKZ000-KSZ000-TXZ000-COZ000-052345-

    Mesoscale Discussion 1891
    NWS Storm Prediction Center Norman OK
    0512 PM CDT Tue Aug 05 2025

    Areas affected...Southeast CO...southwest KS...western OK
    Panhandle...and far northern TX Panhandle

    Concerning...Severe potential...Watch unlikely=20

    Valid 052212Z - 052345Z

    Probability of Watch Issuance...5 percent

    SUMMARY...An isolated severe risk may persist for the next couple
    hours. Large hail and locally severe wind gusts are possible with
    any sustained storms.

    DISCUSSION...An isolated/discrete supercell has evolved over far
    southeast CO -- on the eastern periphery of a deeply mixed boundary layer/dryline feature. This storm is now impinging on richer
    boundary-layer moisture to the east (lower/middle 60s dewpoints),
    where moderate-strong surface-based buoyancy is in place. This,
    combined with around 40 kt of effective shear, should continue to
    support supercellular structure -- with a risk of large hail and
    locally severe gusts. However, the small updraft size and weak
    forcing for ascent casts uncertainty on overall storm longevity --
    especially given some lingering inhibition at the top of the
    boundary layer (see AMA 18Z observed sounding). For these reasons,
    the severe risk is expected to remain localized and brief.

    ..Weinman/Gleason.. 08/05/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-k7EiQgWhVL2-GLVA79u6MiEKAEPt_jaRWh-LS2WJqGuKXEZJZI9OHaLSZCCCE6PKKyPtjqwb= 1D4bgMjJgf-cSAo9a0$ for graphic product...

    ATTN...WFO...DDC...AMA...PUB...

    LAT...LON 36570266 36960285 37440262 37630222 37560178 37150121
    36360115 36190163 36300216 36570266=20

    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


    =3D =3D =3D
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