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  • MESO: Mesoscale Discussion 0022

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, January 19, 2019 00:55:20
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 182355
    SWOMCD
    SPC MCD 182354
    ILZ000-IAZ000-MOZ000-KSZ000-190600-

    Mesoscale Discussion 0022
    NWS Storm Prediction Center Norman OK
    0554 PM CST Fri Jan 18 2019

    Areas affected...Northeast KS...Northern MO...Southern/Eastern
    IA...Western IL

    Concerning...Heavy snow

    Valid 182354Z - 190600Z

    SUMMARY...Moderate to locally heavy snow rates are possible this
    evening.

    DISCUSSION...Snow rates have recently intensified across portions of central/southern IA, in response to increasing deep-layer ascent in
    advance of shortwave trough (with multiple embedded vorticity
    maxima) moving into the southern Plains. Heavy snow will continue to
    be possible across northern MO, central/eastern IA and eventually
    into western IL, as low/midlevel frontogenesis (which has been
    maximized further north during the day) becomes refocused for a time
    this evening across the region. Rates at or above 1 inch/hr will be
    possible for at least a few hours at any one location.

    Further to the southwest, the rain/snow line is expected to shift
    southeast with time across portions of northeast KS/northwest MO,
    with areas currently seeing heavier precip rates from Topeka into
    the Kansas City metro area eventually changing over to snow. While liquid-to-snow ratios will likely be lower compared to areas further
    north, locally heavy snowfall rates will be possible for at least a
    brief period this evening before the precipitation ends from west to
    east later tonight.

    ..Dean.. 01/18/2019

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...ILX...LSX...DVN...ARX...DMX...EAX...TOP...

    LAT...LON 40029522 41759389 42659215 42589114 42479060 42028969
    41169010 40139136 39449343 39059450 38489630 39129685
    40029522



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