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  • MESO: Mesoscale Discussion 2248

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Dec 2 18:34:46 2025
    ACUS11 KWNS 021834
    SWOMCD
    SPC MCD 021834=20 MEZ000-MAZ000-NHZ000-RIZ000-CTZ000-VTZ000-NYZ000-NJZ000-PAZ000-022230-

    Mesoscale Discussion 2248
    NWS Storm Prediction Center Norman OK
    1234 PM CST Tue Dec 02 2025

    Areas affected...Southern New York into New England

    Concerning...Heavy snow=20

    Valid 021834Z - 022230Z

    SUMMARY...Heavy snowfall rates between 1-2 inches per hour remain
    likely across southern New York into portions of New England this
    afternoon.

    DISCUSSION...Latest radar mosaics show the development of a snow
    band across portions of south/southeastern New York in response to strengthening frontogenesis between the 925-850 mb levels across the Mid-Atlantic/New England coast. Surface observations and web cams
    under this band are reporting visibility reductions between 1/4 to
    1/2 mile, which given weak winds across the region, are likely being
    driven primarily by moderate to heavy snowfall rates. Broad-scale
    ascent ahead of an approaching upper wave and more focused mesoscale
    ascent within the warm advection branch of an intensifying low-level
    cyclone (augmented by frontogenetical responses) will remain
    favorably phased through the remainder of the afternoon over the
    greater New England region. This will continue to favor widespread light/moderate precipitation and the maintenance and/or development
    of heavier precipitation bands. Consequently, snowfall rates between
    1-2 inches/hour will remain likely for areas north of the surface
    freezing line. Nearly isothermal temperature profiles from the
    surface to around 850 mb suggests that areas near the surface
    freezing line may continue to see rapid fluctuations in
    precipitation type between snow, sleet, and potentially freezing
    rain.

    ..Moore.. 12/02/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9oVOm6dgiTRpp_AOZf97RN7EcIAjHg_XXlLU68jeMwViQ3JAztGiqzYMeYKh4lBRDhIEUEodh= hG3ikg17n8lh5Xe59Y$ for graphic product...

    ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...

    LAT...LON 42227105 41537270 41247350 41107407 41167459 41297490
    41587521 41947516 42257497 42457469 43647197 43657149
    43567127 43127069 42887051 42647051 42457066 42227105=20


    =3D =3D =3D
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