• MESO: Mesoscale Discussion 0685

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed May 19 12:10:24 2021
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    ACUS11 KWNS 191210
    SPC MCD 191209=20

    Mesoscale Discussion 0685
    NWS Storm Prediction Center Norman OK
    0709 AM CDT Wed May 19 2021

    Areas affected...south Texas

    Concerning...Severe Thunderstorm Watch 191...

    Valid 191209Z - 191345Z

    The severe weather threat for Severe Thunderstorm Watch 191

    SUMMARY...Damaging wind potential appears to be increasing across
    parts of south Texas near the Rio Grande. Damaging gusts are
    possible over the next couple of hours.

    DISCUSSION...A cluster of thunderstorms west of McAllen along the
    Rio Grande is becoming better organized this morning, taking on a
    more intense bowing characteristic in radar imagery. Some evidence
    of a developing rear inflow jet is evident in radar loops over the
    past 20-30 minutes. Downstream, a very unstable airmass is in place,
    with the BRO 12z RAOB indicating close to 4000 J/kg SBCAPE. Locally
    intense winds are possible near the Rio Grande vicinity in southern
    Starr and Hidalgo counties over the next hour or so. The bow will
    continue to develop eastward at around 40kt, approaching Brownsville
    by around 14-15z.

    ..Leitman.. 05/19/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!t38t9N7Q9b_9xXTB4D3KcPzaln7Wq5vBm979WeIBaxQXL9ewwaqdH-1vbqbqgCc3QWxvoswd$=
    for graphic product...


    LAT...LON 26689921 27069886 27069852 26939818 26599765 26169755
    25959765 25909792 25969846 25989865 26089920 26439932

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