• MESO: Mesoscale Discussion 1709

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Sep 7 21:38:10 2021
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    ACUS11 KWNS 072138
    SWOMCD
    SPC MCD 072137=20
    MIZ000-OHZ000-INZ000-072300-

    Mesoscale Discussion 1709
    NWS Storm Prediction Center Norman OK
    0437 PM CDT Tue Sep 07 2021

    Areas affected...Portions of Lower Michigan into far northern
    Indiana

    Concerning...Severe Thunderstorm Watch 490...

    Valid 072137Z - 072300Z

    The severe weather threat for Severe Thunderstorm Watch 490
    continues.

    SUMMARY...The severe threat continues across portions of Lower
    Michigan and far northern Indiana. Damaging gusts will be the
    primary threat, though occasional large hail is also possible.

    DISCUSSION...Semi-discrete storm clusters have gradually morphed
    into short linear segments across portions of Lower Michigan over
    the past few hours. Severe winds have recently been reported with a
    few of the stronger storms, including 60 kts measured at Kalamazoo
    and 57 kts at Battle Creek Executive Airport. While modest buoyancy
    remains in place (i.e. 1000 J/kg MLCAPE), ample deep-layer ascent
    and vertical shear are present, with 21Z mesoanalysis showing 50+
    kts of effective bulk shear. As such, damaging gusts should remain
    possible through the late afternoon hours, with an occasional bout
    of severe hail also possible.

    ..Squitieri/Guyer.. 09/07/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!qFDKcHiDY03Z16n52wGMrDNBfJ64ZUip21WrXVx0SeJ4RHoQG-2EBht3fr3tPME5iegrdkAi$=
    for graphic product...

    ATTN...WFO...CLE...DTX...IWX...GRR...LOT...

    LAT...LON 41758701 42458625 43168522 43488428 43688350 43748300
    43558266 42948264 42378286 41938316 41658356 41548443
    41348526 41188573 41058614 40998650 40958688 41758701=20



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