• MESO: Mesoscale Discussion 0040

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, January 20, 2019 12:26:27
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    ACUS11 KWNS 201126
    SWOMCD
    SPC MCD 201126
    NCZ000-201330-

    Mesoscale Discussion 0040
    NWS Storm Prediction Center Norman OK
    0526 AM CST Sun Jan 20 2019

    Areas affected...coastal North Carolina

    Concerning...Severe potential...Watch unlikely

    Valid 201126Z - 201330Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Locally damaging winds could occur early this morning
    across coastal NC and the Outer Banks vicinity.

    DISCUSSION...A NNE/SSW-oriented convective line has shown modest
    signs of increased updraft depth recently including an increase in
    cloud-ground lightning as far north as the middle part of the NC
    coast as of 6AM EST/11Z. Aided by appreciable cyclogenesis/forcing
    for ascent, this wavy/somewhat broken convective line may continue
    to exhibit an increase in convective organization and intensity, at
    least to some degree, particularly along the immediate NC
    coast/Outer Banks before it exits the coast by around 9-10AM EST.

    While a brief tornado cannot be conclusively ruled out coincident
    with very strong low-level shear, the potential for locally damaging
    winds would likely be the primary concern given the marginal nature
    of boundary layer moisture (near 60 F dewpoints) and an observed
    tendency for near-surface winds to veer more southwesterly. The
    overall perceived marginality of the severe risk, along with a
    relatively small spatiotemporal window for such a threat, are
    expected to preclude a Watch issuance.

    ..Guyer.. 01/20/2019

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

    ATTN...WFO...AKQ...MHX...

    LAT...LON 34597692 35367661 36087581 35727515 34897544 34487617
    34597692



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