• MESO: Mesoscale Discussion 1264

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, August 08, 2018 21:53:11
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    ACUS11 KWNS 082153
    SWOMCD
    SPC MCD 082152
    NCZ000-082245-

    Mesoscale Discussion 1264
    NWS Storm Prediction Center Norman OK
    0452 PM CDT Wed Aug 08 2018

    Areas affected...central NC

    Concerning...Severe potential...Watch unlikely

    Valid 082152Z - 082245Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Strong to locally severe gusts (45-60 mph) may focus
    across central NC between Charlotte and the Triangle. Scattered
    pockets of wind damage are probable.

    DISCUSSION...Radar mosaic shows an elongated fine line/gust front
    from Upstate SC north-northeastward into northwestern NC. A broken
    band of thunderstorms is moving east in tandem with an MCV located
    over the southern Appalachians. This band of storms has produced a
    38kt gust at KHKY and a 43kt gust at KBUY during the past
    hour---likely sufficient for pockets of wind damage. Surface
    conditions ahead of the line show temperatures in the lower 90s with
    lower 70s dewpoints. Despite the weak mid-level lapse rates, steep
    0-2 km lapse rates (around 8 degrees C/km) will support some of the
    stronger downdrafts to yield 45-60 mph gusts. Scattered damaging
    winds will occur in localized pockets where the water-laden
    downdrafts are most intense. Given the relatively confined area and
    expected coverage of damaging gusts (isolated), a severe
    thunderstorm watch is unlikely. However, the potential for damaging
    gusts may persist for the next 3-4 hours before diminishing
    instability lessens the straight-line wind threat.

    ..Smith/Hart.. 08/08/2018

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

    ATTN...WFO...RAH...GSP...

    LAT...LON 35938081 35857985 35537892 35167897 35007927 35098090
    35938081



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