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  • MESO: Mesoscale Discussion 0091

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, February 07, 2019 18:35:43
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 071735
    SWOMCD
    SPC MCD 071735
    MIZ000-WIZ000-072030-

    Mesoscale Discussion 0091
    NWS Storm Prediction Center Norman OK
    1135 AM CST Thu Feb 07 2019

    Areas affected...eastern Wisconsin through northern Lower Michigan
    and eastern Upper Michigan

    Concerning...Freezing rain

    Valid 071735Z - 072030Z

    SUMMARY...Areas of freezing rain will persist this afternoon from
    eastern WI into northern Lower MI and eastern Upper MI, with the
    greatest coverage expected through mid afternoon. Rates will range
    generally from .03 inch per hour up to .10 inch per in the heavier
    showers.

    DISCUSSION...As of late morning areas of freezing rain are in
    progress from eastern WI through northern Lower MI. Most of this
    activity is occurring in association with a broad area of isentropic
    ascent north of a warm front situated over the OH Valley. The
    southerly low-level jet will increase across the great lakes today,
    east of a surface low that is deepening in response to an
    approaching shortwave trough. The low will track from northern IL
    through lower MI, and as the low-level jet strengthens, the
    temperature within the melting layers aloft will increase, resulting
    in freezing rain as the dominant precipitation type. Precipitation
    over much of this area might become more widely scattered with time
    due to an approaching dry slot. However, steepening mid-level lapse
    rates resulting from 850 mb warming beneath slight mid-level cooling
    will maintain the potential for local/widely scattered convectively
    enhanced showers.

    ..Dial/Hart.. 02/07/2019

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

    ATTN...WFO...DTX...APX...GRR...MQT...GRB...MKX...

    LAT...LON 46618509 45808391 44868338 43698417 43898674 43128899
    43788916 46328629 46618509



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