TidalMapCobbs Creek at Rainbow Dr, near Decatur, 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 02203873 sits on Cobbs Creek and reads everything draining 8.0 square miles of the Upper Ocmulgee basin. Its datum sits 779 feet above sea level NAVD88. Daily flow has been on record here since 2013, 13 years of it.
Where this gauge sits in the drainage
No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from South River at Flakes Mill Road near Atlanta, GA at 99 square miles, so what passes this gauge is about 8% of the water measured there. Water passing here goes on to South River at Klondike Road, near Lithonia, GA and South River at GA 81, at Snapping Shoals, GA.
Normal flows here
Cobbs Creek runs a median of 5.9 cfs at this gauge across 13 years of record. February is the fullest month at a median 8.2 cfs, and October the leanest at 3.9 cfs. The highest daily mean on record is 722 cfs in 2016, and the lowest is 0.7 cfs in 2025.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 7.0 cfs | 119% |
| Feb | 8.2 cfs | 139% |
| Mar | 8.0 cfs | 136% |
| Apr | 7.7 cfs | 131% |
| May | 6.1 cfs | 103% |
| Jun | 5.2 cfs | 89% |
| Jul | 5.3 cfs | 90% |
| Aug | 5.8 cfs | 98% |
| Sep | 4.2 cfs | 72% |
| Oct | 3.9 cfs | 66% |
| Nov | 4.2 cfs | 72% |
| Dec | 5.9 cfs | 100% |
Medians from the USGS daily-statistics record, 2013 to 2025. A month at 100% is running at its own long-term median.
Flood stages and record crests
Cobbs Creek reaches flood stage at this gauge at 11 feet. NWS starts watching it at 9 feet. The highest crest on record is 13.3 feet, in October 2020.
| Category | Gage height |
|---|---|
| Action | 9 ft |
| Minor flooding | 11 ft |
| Moderate flooding | 17 ft |
| Major flooding | 20 ft |
| When | Crest |
|---|---|
| October 2020 | 13.3 ft |
| December 2015 | 12.8 ft |
| March 2024 | 11.9 ft |
| September 2024 | 11.8 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge COBG1. Stages are gage height, not depth. Not for navigation.
Dams near this gauge
The Army Corps' Morgan Falls Dam is 20 miles from this gauge. The Corps publishes no release schedule for this project; its last observed release and elevations load below.
- Morgan Falls Dam 20 miles
Nearby river gauges
- Shoal Creek at Columbia Drive near Atlanta, GA
- Snapfinger Creek at Thompson Mill Rd near Lithonia, GA
- South River at Flakes Mill Road near Atlanta, GA
- Doolittle Creek at Flat Shoals Rd, near Decatur, GA
- Snapfinger Creek near Decatur, GA
- South River at Bouldercrest Road at Atlanta, GA
- Pole Bridge Creek at Evans Mill Rd near Lithonia, GA
- South Fork Peachtree at Casa Dr, near Clarkston, GA
- Burnt Fork Creek at Millwood Way near Clarkston, GA
- South River at Forrest Park Road, at Atlanta, GA
- Burnt Fork Creek at Montreal Rd, near Tucker, GA
- South River at Klondike Road, near Lithonia, GA
Live streamflow and gage height: USGS gauge 02203873. Percentile context computed against the gauge's period of record. Not for navigation.
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