• MESO: Mesoscale Discussion 0959

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, June 30, 2018 21:23:53
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    ACUS11 KWNS 302123
    SWOMCD
    SPC MCD 302123
    MIZ000-WIZ000-IAZ000-MNZ000-302230-

    Mesoscale Discussion 0959
    NWS Storm Prediction Center Norman OK
    0423 PM CDT Sat Jun 30 2018

    Areas affected...Portions of Wisconsin and the Upper Peninsula of
    Michigan

    Concerning...Severe potential...Severe Thunderstorm Watch likely

    Valid 302123Z - 302230Z

    Probability of Watch Issuance...95 percent

    SUMMARY...A new Severe Thunderstorm Watch will likely be issued
    shortly to cover an increasing threat for damaging winds and
    isolated large hail across the region.

    DISCUSSION...Visible satellite depict deepening convection from
    parts of northern/central Wisconsin into the Upper Peninsula of
    Michigan. Additionally, a maturing convective system is slowly
    developing eastward across Watch 245. With rich boundary-layer
    moisture (e.g., surface dew points in the 70s) and steep mid-level
    lapse rates in place, strong MLCAPE (on the order of 3000-4000 J/kg)
    and modest deep-layer shear will support further cluster/multicell
    modes capable of damaging downburst winds and perhaps a few severe
    hail reports. To cover the threat, a watch will likely be issued
    shortly.

    ..Picca/Thompson.. 06/30/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...MQT...GRB...MKX...DLH...ARX...MPX...

    LAT...LON 43049133 46219077 47158925 47368809 46818718 45828711
    43588796 42778963 42749095 43049133



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