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  • MESO: Mesoscale Discussion 0115

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, February 20, 2019 16:09:40
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    ACUS11 KWNS 201509
    SWOMCD
    SPC MCD 201509
    MIZ000-WIZ000-MNZ000-202115-

    Mesoscale Discussion 0115
    NWS Storm Prediction Center Norman OK
    0909 AM CST Wed Feb 20 2019

    Areas affected...Eastern Minnesota...Northern Wisconsin...Western
    Upper Michigan

    Concerning...Heavy snow

    Valid 201509Z - 202115Z

    SUMMARY...Heavy snowfall is expected to develop over parts of
    eastern Minnesota, northern Wisconsin and western Upper Michigan
    late this morning into early afternoon. Snowfall rates of up to 1
    inch per hour will be possible in the heaviest bands.

    DISCUSSION...The latest water vapor imagery shows a
    negatively-titled upper-level trough moving northeastward across the
    Upper Midwest this morning. A deformation zone has already set up
    across parts of southern Minnesota with a band of moderate to
    locally heavy snow located from southeast Minnesota into western
    Wisconsin. Large-scale ascent is being enhanced along this corridor
    by the left exit region of a 90 to 110 kt mid-level jet. Also, a 40
    to 60 kt low-level jet is currently analyzed by the RAP just to the
    south of this east to west band which is contributing to strong lift
    in the region. The low-level jet is forecast to move
    north-northeastward across Wisconsin late this morning which will
    help to enhance snowfall rates across eastern Minnesota, northern
    Wisconsin and western Upper Michigan from late morning into early
    afternoon. Snowfall rates of 1 inch per hour will be possible within
    the heaviest portion of the bands. The greatest potential for heavy
    snow over the next 3 to 6 hours will be along the I-35 corridor from Minneapolis to Duluth.

    ..Broyles/Guyer.. 02/20/2019

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

    ATTN...WFO...MQT...GRB...DLH...MPX...

    LAT...LON 47499039 47368887 47108812 46808789 46418786 46138804
    45878850 45548974 45289208 45349327 45659381 46179395
    46749367 47149310 47479201 47499094 47499039



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