• MESO: Mesoscale Discussion 1676

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Sep 2 00:22:04 2021
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    ACUS11 KWNS 020021
    SWOMCD
    SPC MCD 020021=20
    ALZ000-MSZ000-LAZ000-020145-

    Mesoscale Discussion 1676
    NWS Storm Prediction Center Norman OK
    0721 PM CDT Wed Sep 01 2021

    Areas affected...southern Mississippi

    Concerning...Severe potential...Watch unlikely=20

    Valid 020021Z - 020145Z

    Probability of Watch Issuance...5 percent

    SUMMARY...The potential for sporadic wind damage to trees and power
    lines will persist for a couple more hours this evening before
    diminishing with the loss of diurnal heating.

    DISCUSSION...A line of thunderstorms capable of producing strong,
    gusty thunderstorm outflows continues to push southward across
    Mississippi this evening. Although large-scale deep-layer shear is
    weak, storm-scale and mesoscale processes have resulted in shear
    around 30 knots across the area. Additionally, extreme instability
    has resulted in the development of a robust cold pool that continues
    to push southward, with new thunderstorm development along the
    leading edge. The overall environment will continue to support the
    potential for strong, cold downdrafts capable of producing sporadic
    wind damage, especially to trees and power lines, for the next
    couple of hours given relatively steep low-level lapse rates. The
    threat should diminish later this evening as the boundary layer
    stabilizes, and lapse rates weaken, with the loss of diurnal
    heating.

    ..Marsh/Guyer.. 09/02/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!vYmg-EiAX0MlIab1OlqU40v7xG1LrxLdQBAq0YKfbit8EczLkxoURvZQYu8I0_z5i9GYHuSr$=
    for graphic product...

    ATTN...WFO...MOB...JAN...LIX...

    LAT...LON 32329091 32809035 32768931 32488848 31568828 31098842
    30908895 31048998 31649082 32329091=20



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