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  • MESO: Mesoscale Discussion 0082

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Feb 11 19:51:38 2025
    ACUS11 KWNS 111950
    SWOMCD
    SPC MCD 111949=20
    NJZ000-MDZ000-DEZ000-VAZ000-DCZ000-WVZ000-112345-

    Mesoscale Discussion 0082
    NWS Storm Prediction Center Norman OK
    0149 PM CST Tue Feb 11 2025

    Areas affected...parts of the Mid-Atlantic

    Concerning...Heavy snow=20

    Valid 111949Z - 112345Z

    SUMMARY...A band of heavy snow developing across the Mid-Atlantic
    region will be capable of moderate to heavy snowfall rates upwards
    of 1-2 inches per hour. Similar bands and snowfall rates will be
    possible through early evening.

    DISCUSSION...Regional radar imagery shows an organized
    precipitation/snow band developing from west-central VA into the
    Chesapeake Bay area. Recent snowfall reports from central VA and
    surface observations reporting visibility reductions between 0.25 to
    0.5 mile suggest moderate to heavy snowfall rates are ongoing. This
    band is largely being driven by a combination of strong warm-air
    advection and frontogenesis within the 925-700 mb layer and may
    persist for another hour or two given the strength of forcing for
    ascent. Additional banding is possible heading into the late
    afternoon hours as a weak mid-level impulse - and the primary
    precipitation shield - migrates into the region and to the
    north/northeast into northern MD and DE. Recent guidance suggests
    heavy snow potential will likely peak across the Chesapeake Bay area
    during the 21-00 UTC period. Although surface temperatures across
    this region remain near/above freezing, dewpoints in the 20s suggest
    that temperatures will likely fall to below freezing due to
    low-level evaporative cooling associated with the onset of
    precipitation, which should support heavier snowfall rates later
    this afternoon.

    ..Moore.. 02/11/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7_ThCZOus9CyD0EdS70kb2r6HUE3MSeu0idE3qqpIVo25lYxA1il5WqA1r-LTavanoWA3eJej= hWjdnt1ZdMv6r1_maw$ for graphic product...

    ATTN...WFO...PHI...AKQ...LWX...

    LAT...LON 39697503 39597727 39497808 39297861 39027876 38647871
    38157822 37727772 37477737 37357681 37327624 37597546
    37947527 38287504 38927472 39397424 39607435 39667473
    39697503=20


    =3D =3D =3D
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