• MESO: Mesoscale Discussion 1280

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jul 14 16:45:30 2021
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    ACUS11 KWNS 141645
    SPC MCD 141645=20

    Mesoscale Discussion 1280
    NWS Storm Prediction Center Norman OK
    1145 AM CDT Wed Jul 14 2021

    Areas affected...eastern Iowa...southern Wisconsin

    Concerning...Severe Thunderstorm Watch 377...

    Valid 141645Z - 141845Z

    The severe weather threat for Severe Thunderstorm Watch 377

    SUMMARY...The threat for isolated strong gusts or marginal hail
    continues mainly from northeast Iowa into southwest Wisconsin. It is
    unclear if another watch will be needed in the short term.

    DISCUSSION...A north-south oriented band of storms continues
    eastward across the watch and is now crossing the MS River. This
    activity is associated with the leading warm advection ahead of the
    midlevel wave, with veered low-level winds across central IA feeding instability eastward.=20

    Objective analysis shows less instability ahead of the system
    compared to farther west, but continued theta-e advection and areas
    of filtered sunshine may aid destabilization enough for some of this
    activity to become severe. While an additional watch is not
    anticipated in the near term downstream of this ongoing line, trends
    will continue to be monitored for strengthening.

    ..Jewell.. 07/14/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!pTnYdrPFa8sZOf7yJqhYEFh9tcNaUSUQgIw7r1_ddkJEH_gVV97Dqj7-8moAKB-LDnIKJqmg$=
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    LAT...LON 44009182 44398875 44278832 43928802 43328783 42908769
    42578772 42338785 42088848 41949035 42009112 42129139
    42599134 43139136 43649174 43899184 44009182=20

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