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  • MESO: Mesoscale Discussion 0813

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, June 21, 2018 20:57:16
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    ACUS11 KWNS 212057
    SWOMCD
    SPC MCD 212056
    ALZ000-KYZ000-TNZ000-ILZ000-MSZ000-MOZ000-ARZ000-212300-

    Mesoscale Discussion 0813
    NWS Storm Prediction Center Norman OK
    0356 PM CDT Thu Jun 21 2018

    Areas affected...Extreme southern IL...southeast MO...extreme
    western KY...western TN...extreme northern MS...and northeast AR

    Concerning...Severe Thunderstorm Watch 196...

    Valid 212056Z - 212300Z

    The severe weather threat for Severe Thunderstorm Watch 196
    continues.

    SUMMARY...The threat for damaging winds and hail as the primary
    severe weather risks persists across WW 196 late this afternoon into
    the early evening.

    DISCUSSION...Trends in radar imagery indicated a new supercell was
    tracking across far northeast AR, while a broken band of storms
    extended through the MO Bootheel into southern IL along the cold
    front. The environment in vicinity and downstream of these storms
    remains very moist and moderately unstable, supportive for
    additional sustained updrafts as forcing for ascent spreads east
    with the front and within the exit region of a 50-60 kt 500-mb jet.
    These winds are also resulting in strengthening bulk shear to
    support storm organization for a continued severe threat.
    Meanwhile, counties in the wake of the cold front passage can be
    canceled early from the watch as the environment stabilizes with the
    arrival of lower dew points.

    ..Peters.. 06/21/2018

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

    ATTN...WFO...OHX...HUN...PAH...MEG...LZK...

    LAT...LON 34789115 35689110 37718928 37668807 36628765 35038795
    34478824 34318902 34459050 34789115



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