South River at Flakes Mill Road near Atlanta, GA Water Level Today

NWS river forecast

Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.

Last 30 days

About this gauge

USGS gauge 02203900 sits on the South River and reads everything draining 99 square miles of the Upper Ocmulgee basin. Its datum sits 718 feet above sea level NAVD88. Daily flow has been on record here since 1979, 23 years of it.

Where this gauge sits in the drainage

Three gauged sites sit upstream of here. The closest is South River at Bouldercrest Road at Atlanta, GA, reading 41 square miles. This gauge adds the 58 square miles that drain in between. Downstream the next reading comes from South River at Klondike Road, near Lithonia, GA at 182 square miles, so what passes this gauge is about 54% of the water measured there. Water passing here goes on to South River at GA 81, at Snapping Shoals, GA.

Normal flows here

The South River runs a median of 81 cfs at this gauge across 23 years of record. February is the fullest month at a median 121 cfs, and October the leanest at 45 cfs. The highest daily mean on record is 9,380 cfs in 2024, and the lowest is 9.6 cfs in 2012.

Medians from the USGS daily-statistics record, 1979 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

The South River reaches flood stage at this gauge at 13 feet. NWS starts watching it at 11 feet. The highest crest on record is 21.4 feet, in September 2024.

Flood categories and crest history from the NOAA National Water Prediction Service, gauge SFMG1. Stages are gage height, not depth. Not for navigation.

Dams near this gauge

The Army Corps' Morgan Falls Dam is 23 miles from this gauge. The Corps publishes no release schedule for this project; its last observed release and elevations load below.

• Morgan Falls Dam 23 miles