TidalMapChattahoochee River above Roswell, GA Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
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 02335450 sits on the Chattahoochee River and reads everything draining 1,220 square miles of the Upper Chattahoochee basin. Its datum sits 858 feet above sea level NAVD88. Daily flow has been on record here since 1976, 50 years of it.
Where this gauge sits in the drainage
Six gauged sites sit upstream of here. The closest is Chattahoochee River near Norcross, GA, reading 1,170 square miles. This gauge adds the 50 square miles that drain in between. Downstream the next reading comes from Chattahoochee River below Morgan Falls Dam, GA at 1,370 square miles, so what passes this gauge is about 89% of the water measured there. Water passing here goes on to Chatt River at Powers Fy and I-285 near Atlanta, GA, Chattahoochee River at US 41, at Atlanta, GA and Chattahoochee River at Atlanta, GA.
Normal flows here
The Chattahoochee River runs a median of 1,460 cfs at this gauge across 50 years of record. May is the fullest month at a median 1,650 cfs, and January the leanest at 1,320 cfs. The highest daily mean on record is 13,700 cfs in 2021, and the lowest is 323 cfs in 1989.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 1,320 cfs | 90% |
| Feb | 1,490 cfs | 102% |
| Mar | 1,640 cfs | 112% |
| Apr | 1,555 cfs | 107% |
| May | 1,650 cfs | 113% |
| Jun | 1,520 cfs | 104% |
| Jul | 1,500 cfs | 103% |
| Aug | 1,610 cfs | 110% |
| Sep | 1,480 cfs | 101% |
| Oct | 1,380 cfs | 95% |
| Nov | 1,390 cfs | 95% |
| Dec | 1,340 cfs | 92% |
Medians from the USGS daily-statistics record, 1976 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
The Chattahoochee River reaches flood stage at this gauge at 9 feet. NWS starts watching it at 8 feet. The highest crest on record is 12 feet, in September 2009.
| Category | Gage height |
|---|---|
| Action | 8 ft |
| Minor flooding | 9 ft |
| Moderate flooding | 13 ft |
| Major flooding | 17 ft |
| When | Crest |
|---|---|
| September 2009 | 12 ft |
| October 2020 | 11.5 ft |
| September 2024 | 10.4 ft |
| December 2018 | 10 ft |
| September 2004 | 9.9 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge RWLG1. Stages are gage height, not depth. Not for navigation.
Dams near this gauge
The Army Corps' Morgan Falls Dam sits 4 miles from this gauge and its releases set what this gauge reads. The Corps publishes no release schedule for this project; its last observed release and elevations load below.
- Morgan Falls Dam 4 miles
- Buford Dam 18 miles
Nearby river gauges
- Big Creek below Hog Wallow Creek at Roswell, GA
- Crooked Creek near Norcross, GA
- Chattahoochee River below Morgan Falls Dam, GA
- Big Creek near Alpharetta, GA
- Willeo Creek at GA 120, near Roswell, GA
- Nancy Creek at Johnson Ferry Rd, at Chamblee, GA
- Chattahoochee River near Norcross, GA
- N.f Peachtree Creek at Graves Rd, near Doraville,ga
- Sope Creek near Marietta, GA
- Nancy Creek at Rickenbacker Drive, at Atlanta, GA
- Beaver Ruin Creek at Mitchell Rd, near Norcross, GA
- Sewell Mill Creek at GA 120, near Marietta, GA
Live streamflow and gage height: USGS gauge 02335450. Percentile context computed against the gauge's period of record. Not for navigation.
Open Chattahoochee River above Roswell, GA on the live chart →
River pins, dam-release overlays and wadability lines live in the app, start a free TidalMap trial.