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  • MESO: Mesoscale Discussion 0198

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, March 14, 2019 00:26:36
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 132326
    SWOMCD
    SPC MCD 132326
    MNZ000-NDZ000-SDZ000-NEZ000-COZ000-WYZ000-140530-

    Mesoscale Discussion 0198
    NWS Storm Prediction Center Norman OK
    0626 PM CDT Wed Mar 13 2019

    Areas affected...Portions of eastern CO/WY...western NE...the
    Dakotas...and far northwestern MN

    Concerning...Blizzard

    Valid 132326Z - 140530Z

    SUMMARY...Ongoing moderate to heavy snow with blizzard conditions
    will spread northeastward from eastern CO/WY and western NE into the
    Dakotas and far northwestern MN this evening.

    DISCUSSION...23Z analysis shows a 975 mb surface low over western
    KS. A very strong surface pressure gradient exists across much of
    the central and northern Plains this evening, with many locations in northeastern CO, eastern WY, and western NE observing sustained north-northeasterly winds of 30-45 mph, with occasional gusts to
    50-65 mph. A band of moderate to heavy snow associated with
    pronounced large-scale ascent and mid-level frontogenesis to the
    north of an upper low over the central Plains will shift
    northeastward this evening across the Dakotas. Snowfall rates within
    the band should often exceed 1 inch per hour, which combined with
    the very strong low-level winds and visibilities at/below 1/4 of a
    mile, will likely result in blizzard conditions. A gradual reduction
    in snowfall rates will occur across northeastern CO, eastern WY, and
    western NE through about 03Z (9 pm MDT) as both the upper low and
    surface cyclone shift northeastward across KS/NE.

    ..Gleason.. 03/13/2019

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

    ATTN...WFO...FGF...ABR...BIS...LBF...UNR...GLD...BOU...CYS...

    LAT...LON 41640111 41160172 40240251 39490281 39130359 39200424
    39510498 41250505 42480508 44490455 46300207 47949924
    48649763 48949674 48779606 48279562 47559566 46699654
    45009862 42950002 41640111



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