• MESO: Mesoscale Discussion 0510

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue May 4 01:31:06 2021
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    ACUS11 KWNS 040130
    SPC MCD 040130=20

    Mesoscale Discussion 0510
    NWS Storm Prediction Center Norman OK
    0830 PM CDT Mon May 03 2021

    Areas affected...South-central Texas

    Concerning...Severe Thunderstorm Watch 135...

    Valid 040130Z - 040230Z

    The severe weather threat for Severe Thunderstorm Watch 135

    SUMMARY...Large hail and damaging wind gusts will remain possible
    through the next few hours with a couple supercells ongoing within

    DISCUSSION...As of 0110z, KEWX showed a large sueprcell
    thunderstorm, producing numerous reports of severe hail, was located
    above the San Antonio metro. A second, left moving supercell at the
    Gillespie Blanco Kendall county intersection also has a history of
    producing large hail, with several 2-2.5 inch reports along I-10 in
    the last hour. These storms are ongoing in a very unstable and
    moderately sheared environment with 3000-4000 J/kg of MUCAPE and
    40-50 kts effective shear. Hi-res guidance and observation trends
    suggest that a significant hail threat will remain likely with these
    storms as they slowly move eastward in WW135. The greatest threat
    corridor appears to be the eastern San Antonio metro and eastward
    along interstate 10. Storms should slowly begin to weaken with the
    loss of diurnal heating, but severe weather will remain likely
    through 0300z.

    ..Lyons.. 05/04/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!uAD6waRwo2n9JhlZmbWyzdDNMGFgN6zoHXbdjRpMw2a5Bbvy8IDNB6-jsY_EP5bZDvjicb1N$=
    for graphic product...


    LAT...LON 29719763 29389767 29249785 29229808 29279839 29439873
    29739888 30289897 30429878 30449829 30209793 29939772

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