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  • MESO: Mesoscale Discussion 0028

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, January 19, 2019 17:09:52
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 191609
    SWOMCD
    SPC MCD 191609
    OHZ000-MIZ000-INZ000-191915-

    Mesoscale Discussion 0028
    NWS Storm Prediction Center Norman OK
    1009 AM CST Sat Jan 19 2019

    Areas affected...Northeast Indiana...northwest Ohio and southwest
    Michigan

    Concerning...Heavy snow

    Valid 191609Z - 191915Z

    SUMMARY...Moderate to occasionally heavy snow will continue into the
    afternoon. Snowfall rates of 1 to 1.5 inches per hour are expected.

    DISCUSSION...A large precipitation shield has developed north of a
    deepening surface cyclone moving into the southern Ohio Valley.
    North of the rain/snow line, currently located just south of Marion,
    Indiana to near Delaware, Ohio, moderate snowfall has developed. A
    band of enhanced snowfall rates has developed from Rochester,
    Indiana to near Ann Arbor, MI. The location of this band matches 12Z
    NAM cross sections which had an area of negative saturated
    equivalent potential vorticity (EPV) above the low-level
    frontogenesis forcing. This area of conditional symmetric
    instability(CSI) is expected to wane by 18Z and then redevelop
    between 18Z and 21Z across northwest Ohio. Snowfall rates beneath
    these heavier bands will likely exceed 1 inch per hour with snowfall
    rates above 1.5 inches per hour possible. Outside of these stronger
    bands, snowfall rates will be around 0.5 to 1 inch per hour.

    ..Bentley.. 01/19/2019

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...

    LAT...LON 42628279 42338435 42088543 41698590 41448622 41138643
    40708654 40668578 40538467 40568315 40668261 41068231
    41898190 42518178 42628279



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