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  • MESO: Mesoscale Discussion 0055

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, January 27, 2019 20:44:35
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    ACUS11 KWNS 271944
    SWOMCD
    SPC MCD 271944
    MNZ000-SDZ000-NDZ000-280145-

    Mesoscale Discussion 0055
    NWS Storm Prediction Center Norman OK
    0144 PM CST Sun Jan 27 2019

    Areas affected...Southern North Dakota...Northeastern South Dakota...Southwestern Minnesota

    Concerning...Heavy snow

    Valid 271944Z - 280145Z

    SUMMARY...Locally heavy snowfall is expected to develop from
    southern North Dakota into northeastern South Dakota and southwest
    Minnesota late this afternoon into the early evening. Snowfall rates
    of up to 1 inch per hour will be possible.

    DISCUSSION...The latest surface analysis shows a 994 mb low over far
    southeast Saskatchewan. The surface low is associated with a
    shortwave trough currently near the U.S. and Canadian border. These
    features will move southeastward across central North Dakota late
    this afternoon. Southeasterly flow will increase along and to the
    east of the surface low track. In response to these features,
    isentropic lift will become enhanced resulting in increased snowfall
    rates. The latest HRRR looks reasonable and suggests that a band of
    heavy snow will develop in southern North Dakota after 21Z. This
    band is forecast to spread southeastward across northeastern South
    Dakota late this afternoon. Southwestern Minnesota may be affected
    after 00Z/Monday. The heaviest portions of the band could have
    snowfall rates of up to an inch per hour.

    ..Broyles/Hart.. 01/27/2019

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

    ATTN...WFO...MPX...FGF...FSD...ABR...BIS...

    LAT...LON 46719838 46999950 46860021 46310033 45979997 44259803
    43669708 43549611 43569494 44079452 45059544 46719838



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