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  • MESO: Mesoscale Discussion 1368

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, August 27, 2018 07:05:10
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    ACUS11 KWNS 270705
    SWOMCD
    SPC MCD 270704
    MNZ000-270930-

    Mesoscale Discussion 1368
    NWS Storm Prediction Center Norman OK
    0204 AM CDT Mon Aug 27 2018

    Areas affected...Northern MN

    Concerning...Severe Thunderstorm Watch 352...

    Valid 270704Z - 270930Z

    The severe weather threat for Severe Thunderstorm Watch 352
    continues.

    SUMMARY...Damaging wind threat spreading across northern Minnesota
    with potential for WW 352 to be expanded east into part of the
    Minnesota Arrowhead region.

    DISCUSSION...At 0650Z, mosaic radar imagery showed a line of fast
    moving (45-50 kt) storms extending from Ontario and across the
    international border into northern MN (near KINL) and then southwest
    to southern Beltrami and Hubbard Counties. Although objective
    analyses had indicated an increase in inhibition during Sunday
    evening across northern MN, rising surface temperatures and dew
    points per observations across northeast MN ahead of the line are
    aiding in late night destabilization, and some steepening of
    low-level lapse rates. This is being aided further by steep
    midlevel lapse rates spreading east across this region ahead of a
    progressive shortwave trough. IR satellite imagery indicated cooling
    cloud tops with the southern extent of the line, suggesting
    intensifying storms. Given these factors combined with strong
    effective bulk shear, the threat for damaging winds persists
    eastward overnight.

    ..Peters.. 08/27/2018

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

    ATTN...WFO...DLH...FGF...

    LAT...LON 46999468 47239526 47779483 48149375 48309356 48589345
    48639315 48439248 48219177 48169102 47789101 47309177
    47069310 46979385 46999468



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