• MESO: Mesoscale Discussion 1569

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Aug 20 22:52:06 2021
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    ACUS11 KWNS 202251
    SPC MCD 202251=20

    Mesoscale Discussion 1569
    NWS Storm Prediction Center Norman OK
    0551 PM CDT Fri Aug 20 2021

    Areas affected...Eastern ND...Western MN...Northwestern IA

    Concerning...Severe Thunderstorm Watch 451...452...

    Valid 202251Z - 210015Z

    The severe weather threat for Severe Thunderstorm Watch 451, 452

    SUMMARY...Severe threat will shift east across ww451 this evening.

    DISCUSSION...Strong short-wave trough is ejecting northeast across
    the Dakotas this evening. Extensive corridor of convection has
    evolved ahead of this feature from northeast ND, arcing across
    western MN into northwest IA. Strengthening LLJ across MN this
    evening should encourage a slow propagation east over the next
    several hours. While some hail threat is expected with the strongest
    storms, damaging wind may be the primary concern as storms migrate
    across the instability axis over the next few hours.

    ..Darrow.. 08/20/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!ojhNrjegTY0kEFT4sebCL0va-7OquSLY7dDFV6Tbxe_lZV2jLxxETf0Oa_wdYqQapnydFv48$=
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    LAT...LON 44659581 47289646 47629737 48429748 48949647 48679483
    47599427 44739431 44659581=20

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