• MESO: Mesoscale Discussion 0632

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Fri May 1 15:49:56 2026
    ACUS11 KWNS 011549
    SWOMCD
    SPC MCD 011549=20
    TXZ000-011745-

    Mesoscale Discussion 0632
    NWS Storm Prediction Center Norman OK
    1049 AM CDT Fri May 01 2026

    Areas affected...south-central Texas to upper Texas Coast

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

    Valid 011549Z - 011745Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Isolated occurrences of marginally severe hail (1.0-1.5"
    in diameter) will be possible with training, elevated thunderstorms
    from late morning into this afternoon. A Severe Thunderstorm Watch
    is not expected.

    DISCUSSION...Ahead of a vigorous, short-wave trough moving through
    far west TX, clusters of elevated thunderstorms are ongoing from
    portions of the Edwards Plateau east into the TX coastal plain. Warm
    advection within the 2-4-km layer (per regional VWPs) coupled with
    increased DCVA downstream from the approaching trough are likely to
    sustain clusters of thunderstorms within the same general corridor
    through this afternoon.

    12z observed soundings and more recent, RAP-based sounding data
    indicate that poor mid-level lapse rates at the latitude of the
    ongoing storms are limiting parcel buoyancy despite a moist,
    low-level air mass, with MUCAPE estimated in the 500 to perhaps 1000
    J/kg range. However, deep-layer shear remains strong across the
    discussion area, which is contributing to some observed, mid-level
    rotation in the strongest storms. As such, the potential will exist
    for isolated occurrences of marginally severe hail (1.0-1.5" in
    diameter) with any more sustained, supercell structures. A locally
    strong wind gust or two cannot be ruled out with any more intense
    downdrafts that can penetrate the stable, near-surface layer.

    Given the expected limited areal coverage and marginal nature of the
    severe weather threat, a Severe Thunderstorm Watch is not currently
    expected.

    ..Mead.. 05/01/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7cIV06budMh10pjOEGpDcMvIb1S7-nIbONUBRYALzXh8yP6QsufOpgEebFtGQNFLwoFBGRuIP= vVHXb3pK8eoK2zIoW8$ for graphic product...

    ATTN...WFO...HGX...CRP...EWX...

    LAT...LON 28440047 29240085 29959663 30139525 29949457 29399436
    29059465 28509551 28269677 28099787 27929994 28440047=20

    MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


    =3D =3D =3D
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