• MESO: Mesoscale Discussion 0034

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 5 16:53:27 2022
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    ACUS11 KWNS 051653
    SWOMCD
    SPC MCD 051652=20
    NEZ000-KSZ000-COZ000-WYZ000-052045-

    Mesoscale Discussion 0034
    NWS Storm Prediction Center Norman OK
    1052 AM CST Wed Jan 05 2022

    Areas affected...portions of far southeast Wyoming...far western Nebraska...extreme northeast Colorado

    Concerning...Heavy snow=20

    Valid 051652Z - 052045Z

    SUMMARY...Heavy snowfall with 1-2 inch/hour rates remain possible
    into the early afternoon with a band of heavier snow ongoing across
    southeast Wyoming. Some of these heavier rates may reach the Colorado/Nebraska/Kansas border by mid to late afternoon.

    DISCUSSION...A 500 mb impulse embedded in broad northwesterly
    mid-level flow is now traversing the central Rockies, supporting
    surface low intensification across southern WY and associated
    deep-layer ascent. 16Z mesoanalysis shows very strong surface-700 mb frontogenesis situated ahead of the surface low across southeast WY
    to the KS/CO/NE border vicinity, amid a sub-freezing troposheric
    profile depicted by surface observations and 15Z RAP forecast
    soundings valid for 16Z. Strong 700 mb warm-air/moisture advection
    will continue to pump 70+ percent saturated air into a 1500+ m deep
    -12 to -17C dendritic growth layer experiencing intense ascent. As
    such, 1-2 inch/hr snowfall rates are likely through the afternoon.
    Before deep-layer ascent wanes, some of the heavier snowfall rates
    may approach the CO/NE/KS border.

    ..Squitieri.. 01/05/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!p6sMbeTv_smkkv6PaYmAzikVhwBjJPwVX68EpDeXJxPopsxe1PCsXqzfM2dBPXyJuKYstuNv$=
    for graphic product...

    ATTN...WFO...LBF...GLD...BOU...CYS...

    LAT...LON 42240560 42110401 41480212 40810093 40170046 39950085
    40090159 40370250 40680333 40950419 41100474 41300524
    41570540 42240560=20



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