• MESO: Mesoscale Discussion 1645

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Aug 30 07:44:38 2021
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    ACUS11 KWNS 300744
    SWOMCD
    SPC MCD 300744=20
    FLZ000-ALZ000-MSZ000-LAZ000-300945-

    Mesoscale Discussion 1645
    NWS Storm Prediction Center Norman OK
    0244 AM CDT Mon Aug 30 2021

    Areas affected...Central Gulf Coast

    Concerning...Tornado Watch 474...

    Valid 300744Z - 300945Z

    The severe weather threat for Tornado Watch 474 continues.

    SUMMARY...A tornado threat will continue across the central Gulf
    Coast region today. A new tornado watch will be needed when WW 474
    expires at 11Z.

    DISCUSSION...Hurricane Ida is currently located in southeast
    Louisiana about 25 statute miles to the north of Baton Rouge. Radar
    imagery shows a large area of moderate to heavy rainfall located to
    the north and east of the center of Ida, across far southeast
    Louisiana, southern Mississippi and southern Alabama. Although weak
    instability is in place across most of the area, the latest WSR-88D
    VWP from Mobile has 0-1 km shear of 35 kt. This will be favorable
    for storm rotation. Cells that remain semi-discrete within this
    large area of rain may become supercellular with a tornado threat.
    Although Ida will continue to weaken, the tornado threat should
    persist across much of the central Gulf Coast for much of the day.

    ..Broyles/Thompson.. 08/30/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!qlRFHpje4SWLv4x3ZZAyezF2KBkEPIfX0J2I5K05iFI8rJ4Mz-_h2B99baBhx8Jbt8EoEmUQ$=
    for graphic product...

    ATTN...WFO...TAE...MOB...JAN...LIX...

    LAT...LON 28678895 28648912 28678922 28878938 28978938 29068931
    29208942 29348977 29368994 29579002 29729004 29999010
    30069028 30149040 30229051 30319053 30389048 30509056
    31309050 31339020 31689023 31848848 31718848 31718803
    31778811 31938801 31938771 31848754 31828690 31558687
    31498665 31288669 31058666 30978635 30018646 30038684
    29938746 29828812 29848833 29618848 29458863 29368867
    29048864 28948869 28748886 28668898 28678895=20



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