• MESO: Mesoscale Discussion 1542

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Aug 17 07:14:10 2021
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    ACUS11 KWNS 170714
    SWOMCD
    SPC MCD 170713=20
    GAZ000-170915-

    Mesoscale Discussion 1542
    NWS Storm Prediction Center Norman OK
    0213 AM CDT Tue Aug 17 2021

    Areas affected...Parts of central Georgia

    Concerning...Severe potential...Watch possible=20

    Valid 170713Z - 170915Z

    Probability of Watch Issuance...60 percent

    SUMMARY...The environment has become increasingly conducive to
    occasional supercell structures capable of producing short-lived
    tornadoes near and southwest through north of Macon, GA, and this
    may continue to develop northward toward areas near and southeast of
    the Greater Atlanta metropolitan area through daybreak.

    DISCUSSION...As Tropical Storm Fred slowly migrates northward to the southwest/west of the Columbus, GA area, latest observational data
    and objective analysis indicate northwestward advection of moist
    boundary-layer air characterized by mid/upper 70s F dew points is
    ongoing across southeastern through central Georgia. This has
    contributed to a substantive increase in boundary-layer CAPE during
    the past few hours, and inflow of this air is contributing to
    thunderstorm development within bands of convection pivoting around
    the northeastern periphery of the low-level cyclonic circulation
    center. This coincides with where clockwise-curved low-level
    hodographs are maximized and supportive of occasional development
    and strengthening of low-level mesocyclones capable of producing
    tornadoes.

    ..Kerr/Edwards.. 08/17/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!v-CWfWsxfGzqQa6_B3LEHa9L3BkavF77fkqs1M2f6PwEUHQuXiNPjyAI5PZ-0cdvWX4VGi_q$=
    for graphic product...

    ATTN...WFO...FFC...

    LAT...LON 32688414 33258436 33678415 33638366 32878319 32488337
    32268371 32328397 32688414=20



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