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  • MESO: Mesoscale Discussion 2283

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Dec 28 23:53:52 2025
    ACUS11 KWNS 282353
    SWOMCD
    SPC MCD 282353=20
    IAZ000-MNZ000-290500-

    Mesoscale Discussion 2283
    NWS Storm Prediction Center Norman OK
    0553 PM CST Sun Dec 28 2025

    Areas affected...Central Minnesota into northern Iowa

    Concerning...Blizzard=20

    Valid 282353Z - 290500Z

    SUMMARY...Blizzard conditions are expected to gradually increase
    through the evening across portions of the Upper Midwest. 30-40 mph
    sustained westerly winds will coincide with increasing snowfall
    rates, resulting in reduced visibility, perhaps below a quarter
    mile, in some instances.

    DISCUSSION...Mesoanalysis indicates that the surface low, currently
    at 993 mb and located over southern Lake Michigan, is continuing to
    deepen while gradually drifting to the northeast. In response to
    surface low intensification is a broadening and gradual
    strengthening of the west-northwesterly surface wind field within
    the low's northwestern quadrant. Surface observations show
    widespread 30+ mph sustained wind speeds across much of western MN
    into central IA. Meanwhile deep-layer cold air advection, and the
    advection of mid-level moisture around the surface low, is resulting
    in a broad band of snow pivoting around the low's northwestern
    quadrant. As a result, moderate to perhaps occasionally heavy
    snowfall rates will coincide with the 30+ mph west-northwesterly
    surface wind field, which may strengthen further in tandem with the
    low. Increasingly common blizzard conditions may manifest, with
    reduced visibility down to or below a quarter mile where the heavier
    snow bands and wind gusts may overlap.

    ..Squitieri.. 12/28/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4gBZ8gmAHBqw0jV673MfRlZ0P34jYKi8z_bmq-K28L8c0qap0tjzmxIFjcZsVBDFO_iobanN_= SZlRkAF2aHOL8VyXu8$ for graphic product...

    ATTN...WFO...DVN...ARX...MPX...DMX...FSD...

    LAT...LON 45619391 45769447 45819518 45589575 45089579 44559551
    43319451 42079333 41909267 42159195 42609141 43149124
    43629149 44089188 44729280 45619391=20


    =3D =3D =3D
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