• MESO: Mesoscale Discussion 0895

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, May 24, 2022 03:44:00
    ACUS11 KWNS 240343
    SWOMCD
    SPC MCD 240343=20
    TXZ000-240545-

    Mesoscale Discussion 0895
    NWS Storm Prediction Center Norman OK
    1043 PM CDT Mon May 23 2022

    Areas affected...Deep South TX

    Concerning...Severe Thunderstorm Watch 266...

    Valid 240343Z - 240545Z

    The severe weather threat for Severe Thunderstorm Watch 266
    continues.

    SUMMARY...Strong/severe thunderstorms will propagate across deep
    south Texas over the next few hours. Large hail and damaging winds
    are possible.

    DISCUSSION...Several slow-moving thunderstorm clusters have
    developed into a forward-propagating MCS over the lower Valley in
    the last hour. While 00z soundings from CRP/BRO exhibited some
    inhibition, strength of ongoing and expanding precipitation shield
    suggest momentum will likely continue, especially given the gusty
    low-level storm inflow in the lowest few km. Additionally, very
    large hail is currently noted over eastern Starr county, but this
    should gradually decrease in size as it moves southeast. It's
    becoming increasingly likely that this MCS will propagate off the
    south TX Coast early this morning.

    ..Darrow.. 05/24/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-52hqmvQQnc8O8xlpcU7hsS3sSenrYpct9SvtgNdHjKDYygpZ0E9hXIvvQlYxEJhvOoubYhIl= _tEAYHBzu1IPkd62bo$ for graphic product...

    ATTN...WFO...BRO...

    LAT...LON 27249861 26949710 25829719 26219908 27249861=20


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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, May 29, 2023 22:15:17
    ACUS11 KWNS 292215
    SWOMCD
    SPC MCD 292214=20
    TXZ000-292345-

    Mesoscale Discussion 0895
    NWS Storm Prediction Center Norman OK
    0514 PM CDT Mon May 29 2023

    Areas affected...Parts of South Texas

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

    Valid 292214Z - 292345Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Isolated strong to severe storms are possible along a
    westward-moving boundary. Large hail and isolated damaging winds are
    possible with the most intense storms. A watch is not expected.

    DISCUSSION...Isolated storms have developed along a westward-moving
    Gulf breeze boundary. These storms are also aided by a weak trough
    moving through South Texas. Thus far, these storms have developed
    and intensified due to steep mid-level lapse rates and around 30 kts
    of effective shear (per mesoanlysis and area VAD profiles). However,
    the westward speed of the boundary is fast enough that storms
    quickly get undercut and weaken rather quickly. Additional
    development is most probable along the boundary. Storms will be
    capable of large hail and isolated damaging winds. Should the
    boundary slow, it is possible that a storm could persist along it
    for a longer duration. The 12Z observed BRO sounding showed some
    warm air aloft around 800 mb. This casts some uncertainty on how far
    south storm robust storm development will occur.

    ..Wendt/Grams.. 05/29/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4XHlg5cAxqTmC_VnNc3TYsIp7KOfSuCYnfHFnYF-OZ8Lbd6b6uOkVOxixl0rafCp7b00nM0hU= XlcXQHDY7D_Qyd614E$ for graphic product...

    ATTN...WFO...CRP...EWX...BRO...

    LAT...LON 28429940 28829905 28669857 28309835 27829820 27119814
    26459815 26009830 25959879 26379918 28429940=20


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