Chattahoochee River at Highway 141 near Norcross, GA
River level and flood forecast · Gwinnett County
Normal2.4 ftas of Mon 4:15 PM
The river is 9.6 ft below flood stage (12 ft).
Flow: 1,040 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 20 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 12 ft |
| Action stage | 10 ft |
| Record crest (January 8, 1946) | 27.7 ft |
What floods at each level
From the National Weather Service, highest first.
- 28 ftRecord flooding not seen since January 1946 will inundate property along the river upstream and downstream from the gage on Medlock Bridge Road. Flood waters submerge numerous homes to their roofs in the area including those on Marsh Park Drive...Vista Bluff Drive...Hershinger Close and Saint Georgen Common. The Medlock Bridge Road will be under 4 feet of water. The Atlanta Athletic Club Golf Course will be flooded up to 14 feet deep.
- 24 ftMajor flooding expands with widespread inundation of property along the river upstream and downstream from the gage on Medlock Bridge Road. Flood waters submerge numerous homes and access roads in the area including those on Marsh Park Drive...Vista Bluff Drive...Hershinger Close and Saint Georgen Common. The Medlock Bridge Road will begin to flood. Large portions of the Atlanta Athletic Club Golf Course will be flooded up to 10 feet deep.
- 20 ftMajor flooding begins with widespread inundation of property along the river upstream and downstream from the gage on Medlock Bridge Road. Flood waters affect numerous homes in the area including those on Marsh Park Drive...Vista Bluff Drive...Hershinger Close and Saint Georgen Common. Some access roads will be flooded. The Medlock Bridge Park in the Chattahoochee River National Recreation Area and large portions of the Atlanta Athletic Club Golf Course will be flooded up to 8 feet deep.
- 18 ftSignificant flooding expands into the woodlands and numerous residential yards along the river upstream and downstream from the gage on Medlock Bridge Road. Flood waters affect several homes in the area including those on Marsh Park Drive...Vista Bluff Drive...Hershinger Close and Saint Georgen Common. Some access roads will begin to flood. Portions of the Medlock Bridge Park in the Chattahoochee River National Recreation Area and the Atlanta Athletic Club Golf Course will be flooded up to 6 feet deep.
- 16 ftModerate flooding begins. Significant flooding occurs in the woodlands and numerous residential backyards along the river upstream and downstream from the gage on Georgia Highway 141 or Medlock Bridge Road. Flood waters begin to enter some homes on Marsh Park Drive...Vista Bluff Drive...Hershinger Close and Saint Georgen Common. Portions of the Medlock Bridge Park in the Chattahoochee River National Recreation Area and the Atlanta Athletic Club Golf Course will be flooded up to 4 feet deep.
- 14 ftMinor flooding expands into the woodlands and numerous residential backyards along the river upstream and downstream from the gage on Georgia Highway 141 or Medlock Bridge Road. Portions of the Medlock Bridge Park in the Chattahoochee River National Recreation Area and the Atlanta Athletic Club Golf Course will be flooded up to two feet deep.
- 12 ftFlood Stage is reached. Minor flooding begins in the woodlands and numerous residential backyards of homes along the river upstream and downstream from the gage on Georgia Highway 141 or Medlock Bridge Road. Flood waters will begin to cover a parking lot at Medlock Bridge Park in the Chattahoochee River National Recreation Area. Low lying portions of the Atlanta Athletic Club Golf Course will begin to flood.
- 9 ftBankfull conditions occur along the river upstream and downstream from the gage at Georgia Highway 141 or Medlock Bridge Road. The water level reaches the top of the boat ramp of the Medlock Bridge Park in the Chattahoochee River National Recreation Area.
Highest crests on record
- 27.7 ft — January 8, 1946
- 27.1 ft — December 10, 1919
- 27.1 ft — December 13, 1919
- 23.4 ft — April 1, 1886
- 22.2 ft — April 7, 1936
Recent crests: 14.01 ft (October 11, 2020) · 12.43 ft (May 19, 2013) · 14.51 ft (September 22, 2009) · 12.47 ft (March 16, 1973) · 13.1 ft (April 5, 1964)
Up and down the river, and nearby
- UpstreamChattahoochee River at 0.76 mile upstream McGinnis Ferry near Suwanee, GA
- DownstreamChattahoochee River above Roswell, GA
- Crooked Creek near Norcross, GA
- Bromolow Creek Tributary at Pond Road near Norcross, GA
- Beaver Ruin Creek at Mitchell Road near Norcross, GA
- Big Creek near Alpharetta, GA
- North Fork Peachtree Creek at Graves Road near Norcross, GA
- Dick Creek at Old Atlanta Road near Suwanee, GA
- Sweetwater Creek (E ATL) at Club Drive near Lilburn, GA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (NCRG1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.