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  • MESO: Mesoscale Discussion 2240

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Nov 29 20:17:34 2025
    ACUS11 KWNS 292017
    SWOMCD
    SPC MCD 292016=20
    OHZ000-MIZ000-INZ000-ILZ000-300015-

    Mesoscale Discussion 2240
    NWS Storm Prediction Center Norman OK
    0216 PM CST Sat Nov 29 2025

    Areas affected...parts of the Midwest

    Concerning...Heavy snow=20

    Valid 292016Z - 300015Z

    SUMMARY...Bursts of moderate to heavy snow are most likely to evolve east/northeast from central Illinois across parts of
    central/northern Indiana towards the Michigan/Ohio border into this
    evening. Snowfall rates around 1 inch per hour are probable, briefly
    near 2 inches per hour possible, before waning tonight.

    DISCUSSION...Within a broad swath of snow across parts of the
    Midwest, bursts of moderate to heavy intensity appear likely to
    persist north of the mixed-phase region centered on southern IL.
    This has been accompanied by early-afternoon lightning flashes in a
    confined corridor into central IL. With the dendritic growth zone
    centered around 550 mb, mid-level ascent is largely progged to be
    stronger eastward within the mixed-phase precip swath closer to the
    OH Valley. Bulk of guidance suggests ascent will wane after sunset
    farther north as the leading shortwave impulse dampens. Until that
    occurs, snowfall reduced visibilities from a quarter to half-mile
    per Springfield, Lincoln, Decatur, and Champaign IL observations
    should shift northeastward. This setup should support initial
    snowfall rates of 1-2 in/hr, becoming more localized near 1 in/hr
    later.

    ..Grams.. 11/29/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!48rggYqydTlnfHy-HqMmeBC_JfKqm8VHFojxXzQbJRd-RTRSYe0XU3FIFeSHQukO11MtBa-2m= JEhEpMy16bY71lotlM$ for graphic product...

    ATTN...WFO...IWX...IND...LOT...ILX...

    LAT...LON 40028869 40628774 41928549 42018475 41478432 40868466
    39578615 39288769 39498839 40028869=20


    =3D =3D =3D
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