• MESO: Mesoscale Discussion 0033

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 5 14:46:54 2022
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    ACUS11 KWNS 051446
    SWOMCD
    SPC MCD 051446=20
    MEZ000-NHZ000-MAZ000-051845-

    Mesoscale Discussion 0033
    NWS Storm Prediction Center Norman OK
    0846 AM CST Wed Jan 05 2022

    Areas affected...portions of western Maine...New Hampshire...central Massachusetts

    Concerning...Freezing rain=20

    Valid 051446Z - 051845Z

    SUMMARY...Freezing rain remains likely in a very narrow corridor
    across northern portions of New England for at least a few more
    hours. .06 inch/3 hour accumulation rates may occur where heavier
    showers overlap below-freezing surface conditions.

    DISCUSSION...Low-level warm-air advection is underway across
    portions of New England within a broad confluence zone ahead of a
    996 mb surface low which continues to gradually deepen across the
    Great Lakes. Despite the low-level warm-air advection, surface
    temperatures remain below freezing across several locales, allowing
    for some ice accumulations to occur (as has been observed over the
    past few hours from eastern NY to southern NH). Some of the latest
    guidance trends suggest that temperatures should remain at or below
    freezing for portions of easter NH, western ME into central MA for
    at least a few more hours, with additional ice accumulations
    possible. While heavier rain rates are expected along the Atlantic
    Coastline (where surface temperatures are above freezing) a very
    narrow corridor exists where brief periods of .06 inch/3 hour rain
    rates may overlap a frozen surface.

    ..Squitieri.. 01/05/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!sZ-mOdkbLGMlaVSAHNFHgb9NpKTYk1fXbx8R-SDOHYQgygcvy6CoAMQ2Mit2NKDbS4P8X772$=
    for graphic product...

    ATTN...WFO...CAR...GYX...BOX...

    LAT...LON 42787155 42557186 42547202 42577211 42817230 43007217
    44617108 45647060 45617004 45466961 45146942 44746954
    44406990 43787038 43277103 42787155=20



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