• MESO: Mesoscale Discussion 1382

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Jul 29 04:25:41 2021
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    ACUS11 KWNS 290425
    SPC MCD 290424=20

    Mesoscale Discussion 1382
    NWS Storm Prediction Center Norman OK
    1124 PM CDT Wed Jul 28 2021

    Areas affected...East-central MN...WI

    Concerning...Severe Thunderstorm Watch 399...

    Valid 290424Z - 290600Z

    The severe weather threat for Severe Thunderstorm Watch 399

    SUMMARY...The severe threat continues across the watch area, and the
    risk for damaging winds, with gusts in excess of 75 mph, will remain
    possible. Large hail and a couple tornadoes may also occur.

    DISCUSSION...Severe storms producing damaging/significant severe
    winds and large hail were in progress across west-central through
    central WI as of 0415z. Radar reflectivity and velocity data have
    sampled well-organized rear-inflow jets with smaller-scale bowing
    segments within the line, with several reports of severe winds
    received thus far. Strengthening warm advection in association with
    a 40 kt southwesterly low-level jet, and moderate/strong MLCAPE over
    much of discussion area, will continue to result in a favorable
    downstream environment into the overnight time frame. Current
    expectations are for storms to continue moving south/southeast along
    an instability gradient over far southeast MN, southern WI and
    perhaps extreme northeast IA through 07z.

    ..Bunting.. 07/29/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!sbcS8g8434sHHR1WMbhlyzoUUXe3fyOXCz1Mzo3WzwWyen6GOTwYcRLGv8VAyPzEe8XF3qCw$=
    for graphic product...


    LAT...LON 44759241 44669013 44468868 44318776 43768729 43078731
    42598756 42558885 42548985 42909097 43899223 44669271

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