• MESO: Mesoscale Discussion 1951

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Nov 28 20:16:11 2021
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    ACUS11 KWNS 282016
    SPC MCD 282015=20

    Mesoscale Discussion 1951
    NWS Storm Prediction Center Norman OK
    0215 PM CST Sun Nov 28 2021

    Areas affected...southeast Lower Michigan into portions of northern

    Concerning...Snow Squall=20

    Valid 282015Z - 282215Z

    SUMMARY...The potential for snow squalls may continue for a few more
    hours as transient lake effect bands merge and move southeast with

    DISCUSSION...As of 2000 UTC, regional radar and visible imagery
    showed several bands of lake-effect snow showers ongoing across
    lower Michigan and northern Ohio. Developing in response to the
    passage of an upper low across the Great Lakes, the merger of the
    several of these bands over the previous hour resulted in the
    development of a heavier snow squall in the vicinity of Detroit.
    Snow squall conditions will be possible downstream in the vicinity
    of the western shores of Lake Erie and across portions of
    northern/northwestern Ohio where surface conditions remain moist and
    marginally unstable.

    Through the afternoon, low-level flow is expected to veer to the
    west/northwest as the upper low moves to the south and east. Visible
    satellite trends over the last several hours also show a gradual
    clearing of convective clouds likely in response to weak subsidence
    on the periphery of the ejecting upper low. The decrease in
    convective coverage suggests that snow squall maintenance is more
    uncertain with southward extent.

    ..Lyons.. 11/28/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!pYwCJh5gcxOqc7xhE2ipa97U68fo1-ycbb89F7ukTa-l1jRmcubH4iiHT1shLnfO-qTkn36b$=
    for graphic product...


    LAT...LON 42628299 42308277 41808271 41418273 41268303 41378383
    41648444 42168482 42668479 42918474 43098460 43128424
    42938367 42628299=20

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