• MESO: Mesoscale Discussion 0056

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, January 28, 2019 00:15:08
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    ACUS11 KWNS 272315
    SWOMCD
    SPC MCD 272314
    FLZ000-280115-

    Mesoscale Discussion 0056
    NWS Storm Prediction Center Norman OK
    0514 PM CST Sun Jan 27 2019

    Areas affected...south Florida and the Keys

    Concerning...Severe potential...Watch unlikely

    Valid 272314Z - 280115Z

    Probability of Watch Issuance...5 percent

    SUMMARY...A broken band of showers -- with a few embedded lightning
    strikes -- will cross south Florida and the Keys over the next few
    hours. A locally strong/damaging gust cannot be ruled out,
    particularly over the Keys.

    DISCUSSION...Latest radar data shows a broken band of low-topped
    showers -- with occasional/embedded lightning -- moving across
    western portions of the Florida Keys, and now reaching the southwest
    Florida Peninsula (Monroe County). The more vigorous updrafts are
    occurring near and south of a surface baroclinic zone, aligned
    west-southwest to east-northeast across Monroe and Miami-Dade
    counties per the latest surface analysis.

    Latest objective analysis shows weak mixed-layer CAPE (generally
    around 500 J/kg) south of the aforementioned boundary, but the
    kinematic trend has been toward a gradual veering of the low-level
    flow. This combined with the limited CAPE suggests an overall
    environment not particularly conducive for generation of damaging
    convective wind gusts. Still, with flow aloft greater than 50 kt
    above 2km AGL, a strong wind gust cannot be ruled out over the next
    few hours -- particularly across the Keys where CAPE is slightly
    greater.

    ..Goss/Grams.. 01/27/2019

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

    ATTN...WFO...MFL...KEY...

    LAT...LON 25918043 26027996 25348015 24708080 24368194 25008137
    25588112 25918043



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