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  • MESO: Mesoscale Discussion 1980

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Dec 10 21:32:37 2021
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    ACUS11 KWNS 102132
    SWOMCD
    SPC MCD 102131=20
    WIZ000-MNZ000-IAZ000-110130-

    Mesoscale Discussion 1980
    NWS Storm Prediction Center Norman OK
    0331 PM CST Fri Dec 10 2021

    Areas affected...Far Northern IA....West-Central WI...Southern MN

    Concerning...Heavy snow=20

    Valid 102131Z - 110130Z

    SUMMARY...A band of heavy snowfall, with rates around 1" to 2" per
    hour, is expected to develop from far northern IA across southern MN
    into west-central WI.

    DISCUSSION...Recent regional radar imagery and surface observations
    continue to show predominantly moderate snowfall from far southwest
    MN into far northwest IA. This radar imagery also depicts the
    western branch of the warm conveyor well, shown by the band of
    precipitation from southern MN southeastward through northern IL.
    Expectation is for the ongoing snowfall band to further
    consolidate/organize during the next few hours, with the persistent
    warm-air advection contributing to an increase in snowfall rates.
    Lift across this region will be augmented by large-scale ascent,
    resulting in robust lift throughout the dendritic growth zone. A
    band of heavy snowfall is anticipated as result, with rates around
    1-2" per hour likely into the evening.

    ..Mosier.. 12/10/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!tiFHvIJuBbMiSIQvG1D7nqvoFQdSLNlstgQ1GOvvsAKvH6ocKF8s8xfYJ7YoUirGDuHVp51R$=
    for graphic product...

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

    LAT...LON 44099585 44699398 45019178 44599043 43699100 43049534
    43429648 44099585=20



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