• MESO: Mesoscale Discussion 1175

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, July 27, 2018 20:51:21
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    ACUS11 KWNS 272051
    SWOMCD
    SPC MCD 272050 MEZ000-MAZ000-NHZ000-CTZ000-VTZ000-NYZ000-NJZ000-PAZ000-DEZ000-VAZ000-MDZ000-DCZ000-WVZ000-272145-

    Mesoscale Discussion 1175
    NWS Storm Prediction Center Norman OK
    0350 PM CDT Fri Jul 27 2018

    Areas affected...Mid-Atlantic states to western ME

    Concerning...Severe Thunderstorm Watch 312...313...314...

    Valid 272050Z - 272145Z

    The severe weather threat for Severe Thunderstorm Watch 312, 313,
    314 continues.

    SUMMARY...The threat for isolated damaging wind gusts and marginally
    severe hail continues for most of the areas covered by Severe
    Thunderstorm Watches #0312, 0313, and 0314 mainly over the southern
    and eastern portions of the area.

    DISCUSSION...Scattered thunderstorms continue to cover an expansive
    area from southern VA to western ME with MLCAPE of 1000 (northeast)
    to 2500 (VA) J/kg and sufficient deep-layer shear continuing to
    support some organized bowing/supercellular characteristics,
    although most of the organized cells have been transient in nature.
    The tendency for outflows spreading quite rapidly from the storms
    despite the stronger deep-layer shear indicates the rather weak
    low-level winds and moderate evaporation occurring under cloud base
    is precluding any longer-lived organization. However, outside of the
    areas that have received expansive stabilization from the earlier
    storms (to be indicated in Watch Status updates shortly), the threat
    for isolated damaging winds and marginally severe hail will continue
    for the next few hours.

    ..Coniglio/Grams.. 07/27/2018

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

    ATTN...WFO...CAR...GYX...BOX...BTV...OKX...ALY...PHI...BGM... AKQ...CTP...LWX...RNK...RLX...

    LAT...LON 37568039 38517960 39377863 40147748 40937661 41807554
    42887407 43767258 44357129 45187057 45816965 45176882
    44486935 43257071 42427153 41567267 40557399 39497481
    38917539 37557625 36957719 36707844 36937971 37568039



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