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  • MESO: Mesoscale Discussion 1644

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, November 13, 2018 14:07:26
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 131307
    SWOMCD
    SPC MCD 131306
    MEZ000-NHZ000-VTZ000-131700-

    Mesoscale Discussion 1644
    NWS Storm Prediction Center Norman OK
    0706 AM CST Tue Nov 13 2018

    Areas affected...northeastern Vermont into western Maine

    Concerning...Heavy snow

    Valid 131306Z - 131700Z

    SUMMARY...Snowfall rates will increase this morning to between 1-2
    inches per hour across portions of northeastern Vermont into western
    Maine.

    DISCUSSION...Precipitation is ongoing across much of the Northeast
    within a broad warm-air advection regime to the north of a
    developing Mid-Atlantic cyclone and to the east of a midlevel
    trough. Within this warm-air advection regime, strong frontogenetic
    forcing in the lower troposphere is focused across southern New
    England. This will lift northward later this morning as the surface
    low moves northeast along the coast. Temperatures across northern
    Vermont and into Maine should remain cold enough to support snow as
    the predominant precipitation type through the day. Thus, as the
    higher precipitation rates associated with the lower-tropospheric
    frontogenetic forcing arrive, the result will be several hours of
    1-2 inch per hour snowfall rates, with higher rates possible on
    small space/time scales. Snowfall rates should begin to decrease
    this afternoon as the low begins to move away from the area.

    ..Marsh.. 11/13/2018

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

    ATTN...WFO...CAR...GYX...BTV...

    LAT...LON 44167137 44307249 44917281 45787059 46936970 46196842
    44836992 44167137



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