• MESO: Mesoscale Discussion 1280

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, August 13, 2018 03:19:11
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    ACUS11 KWNS 130319
    SWOMCD
    SPC MCD 130318
    AZZ000-CAZ000-130415-

    Mesoscale Discussion 1280
    NWS Storm Prediction Center Norman OK
    1018 PM CDT Sun Aug 12 2018

    Areas affected...Portions of southwestern Arizona

    Concerning...Severe Thunderstorm Watch 336...

    Valid 130318Z - 130415Z

    The severe weather threat for Severe Thunderstorm Watch 336
    continues.

    SUMMARY...While isolated stronger gusts remain possible across
    southwest Arizona, the severe threat should further diminish this
    evening. Ongoing Watch 336 will likely be canceled before the 06Z
    expiration time.

    DISCUSSION...Thunderstorm outflow has modified most areas within the
    ongoing watch this evening, with surface temperatures generally in
    the 70s and 80s from Phoenix to points north and east. As such, the
    severe threat has likely dissipated here. To the southwest,
    deep/well mixed boundary-layer profiles remain, and localized
    clusters/mergers may support isolated damaging winds. However,
    decreasing mid-level flow with southwestward extent should combine
    with slowly increasing surface-based inhibition to further reduce
    severe potential here as well. Considering the overall downward
    intensity trends, Watch 336 will likely be canceled prior to its
    original 06Z expiration.

    ..Picca.. 08/13/2018

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

    ATTN...WFO...TWC...FGZ...PSR...

    LAT...LON 32581299 32341400 32531446 33261463 33791432 34331266
    34411235 34461136 33831149 32771244 32581299



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