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  • MESO: Mesoscale Discussion 0056

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jan 12 20:30:01 2024
    ACUS11 KWNS 122029
    SWOMCD
    SPC MCD 122029=20
    WIZ000-IAZ000-MNZ000-MOZ000-130030-

    Mesoscale Discussion 0056
    NWS Storm Prediction Center Norman OK
    0229 PM CST Fri Jan 12 2024

    Areas affected...Iowa

    Concerning...Blizzard=20

    Valid 122029Z - 130030Z

    SUMMARY...Blizzard conditions will become more widespread through
    the afternoon and evening across portions of Iowa.

    DISCUSSION...The primary surface low continues to track to the
    northeast with recent surface observations/analyses depicting the
    center of the low over central IL. To the west/northwest of the low,
    a cold air mass continues to push southward across IA. Gradient
    winds have slowly been increasing with the approach and deepening of
    the low. While sustained winds have largely remained below 35 mph
    thus far, frequent gusts between 30-40 mph have been observed across
    IA with subsequent visibility reductions down to 1/4 mile. Winds are
    forecast to peak around 00 UTC with frequent gusts between 35-45 mph
    likely. Although snowfall should gradually diminish through the
    evening, a fresh, 2+ inch snow pack is in place across much of the
    state per recent LSRs. Blowing snow model output indicates that this combination of winds, a fresh/deep snow pack, and temperatures in
    the teens will support scattered to widespread blizzard conditions
    with prolonged visibility reductions of 1/4 mile or less. Based on
    recent hi-res guidance, portions of central/eastern IA may see wind
    gusts up to 50-55 mph over a 4-10 inch deep snow pack, resulting in
    a corridor of fairly intense blizzard conditions with near-zero
    visibilities possible.

    ..Moore.. 01/12/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9aaXyxepzPxepHz0o-y0t_1j37GFCqLOeagwRRhgw4V-zhYGyUabCKTCtfxwTm8fVx1r2mPnx= KDKnSuLCSmEpX7V9ss$ for graphic product...

    ATTN...WFO...DVN...ARX...DMX...EAX...FSD...OAX...

    LAT...LON 42569536 42099566 41539565 41269543 40969480 40269277
    40339192 40639135 40879120 41539128 42179129 42469118
    42879110 43299131 43509162 43499262 43369346 43029467
    42569536=20


    =3D =3D =3D
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