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  • MESO: Mesoscale Discussion 0069

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, February 05, 2019 20:37:56
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    ACUS11 KWNS 051937
    SWOMCD
    SPC MCD 051937
    ILZ000-WIZ000-IAZ000-MOZ000-060030-

    Mesoscale Discussion 0069
    NWS Storm Prediction Center Norman OK
    0137 PM CST Tue Feb 05 2019

    Areas affected...portions of eastern IA...southwest WI...northwest
    IL and far northeast MO

    Concerning...Freezing rain

    Valid 051937Z - 060030Z

    SUMMARY...Light freezing rain, perhaps mixed with sleet, will
    increase in coverage through the afternoon. Freezing rain rates
    around 0.05 inches per 3 hours or greater are possible into late afternoon/early evening.

    DISCUSSION...Light freezing rain and sleet has been reported at
    several sites across central into eastern IA this afternoon. Latest
    radar trends indicate increasing precipitation coverage across
    eastern IA. Surface temperatures range from the upper teens to upper
    20s across the MCD area and the depth of the near-surface freezing
    layer extends to about 2-3 kft. Atop this cold layer, a strong warm
    nose was evident in morning regional RAOBs as well as latest RAP
    forecast soundings and mesoanalysis around 850mb. As a result,
    freezing rain and sleet should be the predominant precipitation type
    into this evening. Precipitation intensity will be light, however,
    the ingredients are in place for potentially optimal ice
    accumulation given freezing temperatures and light winds. Ice accumulation/freezing rain rates may increase some toward 00z as
    forcing increases as a shortwave impulse currently in NE ejects
    east/northeast through the evening.

    ..Leitman.. 02/05/2019

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

    ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...EAX...

    LAT...LON 41568910 40869051 40489137 40409190 40529222 40689249
    41349282 42009255 42419196 42749122 42949036 42918964
    42698924 42358904 41988898 41568910



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