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  • MESO: Mesoscale Discussion 0111

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, February 20, 2019 06:27:04
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 200527
    SWOMCD
    SPC MCD 200526
    VAZ000-WVZ000-NCZ000-200930-

    Mesoscale Discussion 0111
    NWS Storm Prediction Center Norman OK
    1126 PM CST Tue Feb 19 2019

    Areas affected...Eastern WV...Western VA

    Concerning...Heavy snow

    Valid 200526Z - 200930Z

    SUMMARY...Heavy snow is expected to spread northeast along the WV/VA
    border over the next several hours. Snow rates will likely approach
    1" per hour before precipitation changes to sleet.

    DISCUSSION...Strong low-level warm advection appears to be the
    primary contributor in a large canopy of precipitation that has
    developed across the OH Valley into the central Appalachians late
    this evening. LLJ is currently focused over TN but will strengthen
    and translate across KY into WV by sunrise. Large-scale forcing for
    ascent is expected to increase downstream across WV into western VA
    over the next few hours and this is reflected well in an expansive
    precip shield now spreading east of the higher terrain. Leading edge
    of this activity will fall as snow with rates likely
    approaching/exceeding 1" per hour. Forecast soundings for this
    region suggest substantial warming will switch snow to sleet across
    the southwestern half of the MCD area by 09z while the eastern WV
    Panhandle and northwestern VA should remain as snow through 12z.

    ..Darrow.. 02/20/2019

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

    ATTN...WFO...LWX...RNK...PBZ...RLX...

    LAT...LON 36898138 37448128 38098063 38978030 39187944 38537859
    37087919 36558065 36898138



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