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  • MESO: Mesoscale Discussion 1350

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jun 30 01:53:41 2023
    ACUS11 KWNS 300153
    SWOMCD
    SPC MCD 300153=20
    NEZ000-300330-

    Mesoscale Discussion 1350
    NWS Storm Prediction Center Norman OK
    0853 PM CDT Thu Jun 29 2023

    Areas affected...portions of western into central Nebraska

    Concerning...Severe Thunderstorm Watch 421...

    Valid 300153Z - 300330Z

    The severe weather threat for Severe Thunderstorm Watch 421
    continues.

    SUMMARY...Severe winds will remain a concern across Severe
    Thunderstorm Watch 421, especially in the path of a bow-echo MCS for
    the next few hours. Large hail may also accompany a preceding
    supercell for the next hour or so.

    DISCUSSION...A mature MCS has materialized across western NE, and
    continues to accelerate eastward. The MCS has taken on bow-echo characteristics, with both MRMS mosaic radar data showing a book-end
    vortex to the north of the bow apex, with cross-sections of KLNX
    radar data revealing strong, descending inbound velocities behind
    the apex, indicative of a rear-inflow jet. As such, severe wind
    gusts may accompany this MCS. However, lower-level shear below 5 km
    (and especially in the surface-3 km layer) remains weak across
    western into central NE, so confidence in a long-lasting, robust
    severe-wind threat is not overly high. Nonetheless, at least a few
    severe gusts should remain possible into tonight. Furthermore,
    severe hail (perhaps exceeding 2 inches in diameter) remains
    possible with a discrete supercell ahead of the bow echo, until this
    storm is absorbed into the leading line. It is also possible that
    the merging of the bow echo and supercell may briefly augment the
    severe wind threat.

    ..Squitieri.. 06/30/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-YIO05MlVdMK-CR2Cwwlq7WKHR5NdfGWYzXOeJQooLPD5xR40MFww-4KAaUl5AF1BOHEC-sxg= ACMnJwGJicMCYRDVOo$ for graphic product...

    ATTN...WFO...GID...LBF...CYS...

    LAT...LON 41710264 42680219 42930135 42969984 42669928 41799920
    41189929 40880013 40940149 41110234 41710264=20


    =3D =3D =3D
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