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  • MESO: Mesoscale Discussion 0365

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Tue Apr 7 05:36:55 2026
    ACUS11 KWNS 070536
    SWOMCD
    SPC MCD 070536=20
    IAZ000-MOZ000-NEZ000-071130-

    Mesoscale Discussion 0365
    NWS Storm Prediction Center Norman OK
    1236 AM CDT Tue Apr 07 2026

    Areas affected...portions of eastern Nebraska into southwestern Iowa
    and extreme northern Missouri

    Concerning...Heavy snow=20

    Valid 070536Z - 071130Z

    SUMMARY...Snowfall rates may occasionally exceed 1 inch per hour
    tonight from far eastern Nebraska into portions of southwestern Iowa
    and extreme northern Missouri in association with a heavier band of precipitation.

    DISCUSSION...Latest radar imagery depicts an ongoing precipitation
    band extending from portions of eastern Nebraska into northeastern
    Missouri within a corridor of strong 700-600 mb frontogenesis. While
    surface temperatures remain just above freezing in the mid-30s F,
    continued low-level evaporative cooling amid weak cold, dry air
    advection will support decreasing surface temperatures and a
    transition from rain to snow as the primary precipitation type over
    the next few hours. The aforementioned frontogenetic forcing and
    favorable jet streak dynamics aloft are expected to contribute to
    strong ascent within the dendritic growth zone, which may promote
    occasional snowfall rates of 1 inch or more per hour within the
    heaviest portions of the band.

    Some uncertainty does remain regarding the degree of low-level
    cooling, however, with some guidance suggesting that temperatures
    within a low-level warm layer (evident around 850 mb in the 00Z OAX
    sounding) may remain just above freezing. Should this occur, a
    snow/sleet mix would be more likely.

    ..Chalmers.. 04/07/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5nAssK0LgVX76tP4jyrwkHWP0oPb6kFTqEgIK9Ca5o9Btqok-l83BQYgKYV9-a4VMwVkY2MqA= yJXJy6rd-CLz2rGcD0$ for graphic product...

    ATTN...WFO...DMX...EAX...OAX...

    LAT...LON 40369388 40509435 40839522 40979566 41069616 41129656
    41289677 41539682 41719657 41729575 41449459 41149400
    40939366 40659343 40409364 40369388=20


    =3D =3D =3D
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