075
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

...Please see www.wpc.ncep.noaa.gov for graphic product...

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

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

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