• MESO: Mesoscale Discussion 0022

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 9 01:04:39 2024
    ACUS11 KWNS 090104
    SWOMCD
    SPC MCD 090103=20
    FLZ000-ALZ000-MSZ000-LAZ000-090300-

    Mesoscale Discussion 0022
    NWS Storm Prediction Center Norman OK
    0703 PM CST Mon Jan 08 2024

    Areas affected...southeast LA...far southern MS/AL

    Concerning...Tornado Watch 2...

    Valid 090103Z - 090300Z

    The severe weather threat for Tornado Watch 2 continues.

    SUMMARY...All severe hazards remain possible across Tornado Watch 2.
    An additional isolated hail and wind risk may extend just outside of
    the watch across parts of southern Mississippi/Alabama in the short
    term.

    DISCUSSION...Warm advection storms continue to shift northeast
    across parts of southeast LA into southern MS/AL. This convection is
    elevated and to the cool side of a warm front draped across southern
    LA, and extending just offshore from MS/AL. Strong vertical shear,
    as evident in very large and curved hodographs in regional VWP data,
    will allow for some maintenance and organization of stronger
    updrafts despite weakening instability with northward extent. These
    stronger cells will pose some risk for hail given modest midlevel
    lapse rates and favorable shear, as well as an isolated risk for
    strong gusts.

    A cold front and associated line of convection is currently oriented
    from northeast to southwest LA, and will continue to shift east
    overnight. A narrow warm sector currently confined to far southern
    LA will continue to support tornado potential with any convection
    that may develop ahead of the eastward advancing line of convection,
    or within the line itself with any QLCS/mesovortex circulations. The
    warm front will gradually lift northward overnight as a surface low
    deepens as lifts northeast across the Lower MS/TN Valley. This will
    allow higher-quality Gulf moisture moving into far southern MS/AL
    and eventually the western FL Panhandle. Portions of WW 2, which
    expires at 03z, may need to be included in a new tornado watch,
    which would extend downstream into southern MS/AL and the western FL
    Panhandle.

    ..Leitman.. 01/09/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8G33BZQ6KEDhnhpOwm3aK5K7tLTtISCJ1KupdAY5fhCaZpLCJojJOhSy9ZEpxRPCa5XuSUOfC= PhFZJIlf8S6D7hLBD4$ for graphic product...

    ATTN...WFO...MOB...JAN...LIX...LCH...

    LAT...LON 31019110 31238939 31408824 31308724 30888683 30398679
    30098698 29658751 29088839 29018929 29049079 29209128
    30209145 30719152 31019110=20


    =3D =3D =3D
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