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  • MESO: Mesoscale Discussion 0031

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, January 19, 2019 22:22:24
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 192122
    SWOMCD
    SPC MCD 192121
    INZ000-KYZ000-ILZ000-MOZ000-200015-

    Mesoscale Discussion 0031
    NWS Storm Prediction Center Norman OK
    0321 PM CST Sat Jan 19 2019

    Areas affected...Southern Illinois...far western Kentucky...and west
    central into central Indiana.

    Concerning...Heavy snow

    Valid 192121Z - 200015Z

    SUMMARY...Rain, freezing rain, and sleet will continue to transition
    to snow from northwest to southeast with moderate to heavy snowfall
    expected across this area through the remainder of the afternoon and
    into the evening.

    DISCUSSION...In the last hour, winds have shifted to northerly up to
    2 km on the KIND and KVWX VWP as the 850mb low has started to shift
    east of that longitude. This has started to switch rain to snow
    across portions of this area with a continued transition expected
    over the next several hours. The developing deformation band will
    likely have snowfall rates in excess of an inch per hour. Therefore, significant snowfall accumulations are likely through the evening
    before the system shifts east and drier air moves into the area. In
    addition to the impacts from the rapidly accumulating snowfall,
    winds of 20 to 30 mph with gusts as high as 40 mph will cause
    significant blowing and drifting and visibility restrictions. This
    will become particularly impactful during the evening hours as a
    colder airmass advects into the area and leads to a drier snow which
    will be more prone to blowing and drifting.

    ..Bentley.. 01/19/2019

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

    ATTN...WFO...LMK...IND...PAH...ILX...LSX...

    LAT...LON 38908881 39298822 39868725 40198649 40328612 40228589
    39878587 39448617 38878664 38278721 37808775 37248822
    36928869 36778920 36718957 36798967 37498963 38278941
    38738906 38908881



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