• Heavy Rain/Flooding GA

    From Mike Powell@618:250/1 to All on Tue Jul 2 08:30:00 2024
    AWUS01 KWNH 021306
    FFGMPD
    SCZ000-GAZ000-021600-

    Mesoscale Precipitation Discussion 0539
    NWS Weather Prediction Center College Park MD
    905 AM EDT Tue Jul 02 2024

    Areas affected...Southeast Georgia

    Concerning...Heavy rainfall...Flash flooding possible

    Valid 021305Z - 021600Z

    SUMMARY...Flash flooding is possible as very slow moving
    thunderstorms over southeast Georgia are locally producing
    incredible rainfall rates to 5 inches per hour.

    DISCUSSION...A stationary front over southeast Georgia is acting
    as a focus for thunderstorms that have been producing incredible
    rainfall rates to 5 inches per hour this morning. Fortunately, up
    to this point the heaviest rainfall rates have been over
    unpoplated coastal marshes...however some of the inland cells have
    been producing rates to 2.5 inches per hour, which could cause
    flash flooding if they move over more urban areas, potentially
    including Savannah.

    CAMs guidance has not been handling the evolution of these cells
    well. Most of the guidance suggests they will dissipate soon, but
    the latest radar trends show the cells have been maintaining their
    strength, if not intensifying in some areas. The cells are very
    slow-moving, but have been crawling northward towards more
    populated areas, including Savannah. 1 hour FFGs are around 2-2.5
    inches and 3-hour FFGs are between 2.5-3 inches for Savannah, with
    an area of extreme southern SC near I-95 much lower due to recent
    heavy rainfall. Given the aforementioned rates the cells are
    producing, flash flooding is possible where the cells are most
    persistent.

    Wegman

    ATTN...WFO...CHS...

    ATTN...RFC...SERFC...NWC...

    LAT...LON 32788182 32788153 32458110 32278090 32008082
    31628114 31698127 31838151 31978166 32248188
    32618198
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