• MESO: Mesoscale Discussion 1917

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Oct 27 20:25:20 2021
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    ACUS11 KWNS 272025
    SPC MCD 272025=20

    Mesoscale Discussion 1917
    NWS Storm Prediction Center Norman OK
    0325 PM CDT Wed Oct 27 2021

    Areas affected...southeast Louisiana into southern Mississippi

    Concerning...Tornado Watch 542...

    Valid 272025Z - 272200Z

    The severe weather threat for Tornado Watch 542 continues.

    SUMMARY...Threat for damaging wind and tornadoes including potential
    for a couple of strong tornadoes will persist across southeast LA
    and far southern MS into the early evening.

    DISCUSSION...Warm front is moving northward and currently extends
    from southeast LA near New Orleans northwest into southwest MS.
    Numerous discrete showers and a few supercells continue developing
    across southeast LA within the weakly capped warm sector along and
    south of the warm front where the atmosphere remains moderately
    unstable. The Slidell VWP indicates a large hodograph with veering
    winds in the lowest 1 km supporting up to 350 m2/s2 storm relative
    helicity along the low level jet corridor. Some of the pre-frontal
    convection will likely evolve into mature supercells and become
    capable of producing tornadoes, especially as they interact with the
    warm front. Otherwise, embedded bowing segments, mesovortices and
    occasional supercells continue to be observed within the squall
    line, supporting a threat for damaging wind and QLCS tornadoes.

    ..Dial.. 10/27/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!qYcWLhA2iqQKfQSah5BX3tNOlay8t5ZXw9nymNl7x4UBwxCCR3QMYD1xGJtU7N4BlabcT3uE$=
    for graphic product...


    LAT...LON 29349193 30289140 30869114 31789108 31548980 30688917
    29738949 29009099 29349193=20

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