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  • MESO: Mesoscale Discussion 0001

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Jan 1 04:27:14 2026
    ACUS11 KWNS 010427
    SWOMCD
    SPC MCD 010426=20
    NYZ000-PAZ000-MDZ000-WVZ000-VAZ000-010830-

    Mesoscale Discussion 0001
    NWS Storm Prediction Center Norman OK
    1026 PM CST Wed Dec 31 2025

    Areas affected...portions of central and southern New York into
    central Pennsylvania...western Maryland...extreme northeastern West
    Virginia

    Concerning...Snow Squall=20

    Valid 010426Z - 010830Z

    SUMMARY...A snow squall should continue across portions of the
    northern Appalachians through at least early tonight. Brief periods
    of moderate to heavy snow, 30+ mph gusts, and rapidly reduced
    visibilities are all possible.

    DISCUSSION...Convergence along a surface cold front has increased
    over the past few hours as a 100+ kt 500 mb jet overspreads this
    boundary. As a result, a snow squall has developed. Reduced
    visibilities below a quarter mile have been observed, along with
    brief instances of moderate to heavy snowfall rates and gusts over
    30 mph. The snow squall is expected to persist across portions of
    the northern Appalachians over the next few hours as the parent
    mid-level trough continues to amplify over the region, further
    increasing deep-layer ascent and the strength of the leading line in
    turn. Within the strongest portion of the snow squall, a rapid onset
    of 0.5-1.0 inch/hour snowfall rates could occur, with a rapid
    veering of the surface winds to the northwest at 15-25 mph, with
    higher gusts likely. Visibilities may drop below a quarter mile
    where the stronger winds and higher snowfall rates coincide.

    ..Squitieri.. 01/01/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!_Yl9a_BJzJ4qx0PEP4Tkx6Q9S6qQeTdyDZCgqGasidM0p5t2G72r75E5Kg9ehTJOZO_7p-DyO= ozZ6LqK7y-vCcGxSRk$ for graphic product...

    ATTN...WFO...ALY...PHI...BGM...CTP...LWX...PBZ...

    LAT...LON 39437967 39748016 40148042 40478038 40808035 40897991
    41457812 42387641 42967567 43137482 42877442 42447453
    41837495 41157567 40527644 40117693 39747754 39427832
    39357896 39437967=20


    =3D =3D =3D
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