• MESO: Mesoscale Discussion 1337

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jul 24 03:33:38 2021
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    ACUS11 KWNS 240333
    SWOMCD
    SPC MCD 240333=20
    MNZ000-SDZ000-NDZ000-240530-

    Mesoscale Discussion 1337
    NWS Storm Prediction Center Norman OK
    1033 PM CDT Fri Jul 23 2021

    Areas affected...northeast South Dakota...southeast North
    Dakota...west-central Minnesota

    Concerning...Severe Thunderstorm Watch 388...

    Valid 240333Z - 240530Z

    The severe weather threat for Severe Thunderstorm Watch 388
    continues.

    SUMMARY...Severe gusts or marginally severe hail remains possible
    with a cluster of cells moving the North/South Dakota border.

    DISCUSSION...A primary cluster of storms continues east/southeast
    near the ND/SD border, with new development on the southwest flank.
    A 75 mph gust was recently measured in McPherson County SD. VWPs
    across ND show increased northwest winds just above the surface,
    indicating the deeper cold advection. This is aiding additional
    storms on the northwest side of the primary cluster.

    Temperatures aloft remain cool due east of the advancing convection,
    and the boundary layer remains very moist and unstable. Height falls
    with the upper trough will continue, favoring at least a continued
    threat across the remainder of WW 388 and perhaps to the east. Parts
    of west-central MN may need a watch should the storms continue to
    produce severe gusts.

    ..Jewell.. 07/24/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!ojk0M5jKg0RCdx9kDMMerZDh9QaGsk8MHs0MxP-ttcX7ldvwCbW8zlM-y7wXpyCw7W61uRKU$=
    for graphic product...

    ATTN...WFO...MPX...FGF...ABR...BIS...

    LAT...LON 46239998 46659987 46819947 47059658 46689565 45749551
    45329597 45209676 45189913 45250017 45400041 46239998=20



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