• MESO: Mesoscale Discussion 0832

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jun 1 05:45:45 2021
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    ACUS11 KWNS 010545
    SPC MCD 010544=20

    Mesoscale Discussion 0832
    NWS Storm Prediction Center Norman OK
    1244 AM CDT Tue Jun 01 2021

    Areas affected...Portions of south-central TX

    Concerning...Severe Thunderstorm Watch 231...232...

    Valid 010544Z - 010715Z

    The severe weather threat for Severe Thunderstorm Watch 231, 232

    SUMMARY...Isolated severe wind gusts remain the primary severe
    threat in the short term, but occasional marginally severe hail may
    also occur.

    DISCUSSION...A small cluster of storms along the Rio Grande should
    continue to move slowly southeastward across parts of south-central
    TX early this morning. A moist and at least weakly unstable airmass
    exists downstream of this convection, with surface temperatures
    generally in the mid 70s to low 80s, and dewpoints in the low 70s.
    Around 20-25 kt of south-southeasterly flow is feeding into these
    storms, and strengthening westerly flow at mid/upper levels is
    supporting around 35-40 kt of effective bulk shear. Given the
    current cluster/linear mode, isolated severe wind gusts will likely
    remain the primary severe threat for the next couple of hours. But,
    some potential for marginally severe hail may also exist if an
    embedded supercell develops. This cluster is forecast to move from
    WW 231 into WW 232 within the next hour or so. WW 231 will be
    locally extended in time by WFO EWX to account for the current storm

    ..Gleason.. 06/01/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!rUn1WnHhIX5xjMDtTWwdvrXffZEuTwCKp2piaqtrd3o5X4WUWphxc8kDS5ZjumjflB8NUfjd$=
    for graphic product...


    LAT...LON 28770055 29030015 29039952 28669879 28079894 27599966
    27889996 28240026 28770055=20

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