Chattahoochee River level at Roswell
Georgia · Tubing & floating
Measured at USGS 02335450 — CHATTAHOOCHEE RIVER ABOVE ROSWELL, GA · NWS forecast point RWLG1
Reading taken · as of 28 min ago
Right around its normal summer float level
At 1,740 CFS, this gauge is inside the middle half of the 50 years USGS has recorded for this date (1976–2026), at 111% of the 1,570 CFS median.
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Flood stages at Roswell
National Weather Service categories for gauge RWLG1, WFO FFC. Impact wording is the NWS's own, verbatim.
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Major flood 17.0 ft
- 17.0 ft Major flooding begins. The Fulton County Water Pollution Control Facility will flood between 17 and 17.5 feet. Eves Road begins to flood. Numerous homes are flooded along Riverside Road and Old Riverside Road.
- 20.0 ft Extensive flooding of many homes and businesses will result on Riverside Road. Sections of Riverside Road will be under water.
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Moderate flood 13.0 ft
- 13.0 ft Moderate flooding begins. Extensive flooding of yards...walkways...access roads and some homes develop along parts of Riverside Road...Old Riverside Road and Azalea Drive by the river. Water floods the tennis courts at the Huntcliff Club...the swimming pool and lower portions of the club house. Water is four feet deep over the road leading to the horse stables which are flooded with up to two feet of water. The water level is around one half foot below the gage house which may affect the stage readings.
- 14.0 ft Moderate flooding expands of yards...walkways...access roads and some homes along portions of Riverside Road...Old Riverside Road and Azalea Drive. The tennis courts at the Huntcliff Club...the swimming pool and lower portions of the club house are flooded. Water is around three feet deep in the horse stables. The water level floods the gage house and automated stage readings are unlikely.
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Minor flood 9.0 ft
- 9.0 ft Flood stage is reached. The water reaches the bottom of the Ace Sand Company office and begins to flood the parking lot of Don White Memorial Park on Riverside Road...and the parking lot at the Azalea Park on Azalea Drive west of Roswell Road. Water will approach the tennis courts at the Huntcliff Club across from Azalea Park and begin to flood the road leading to the horse stables. The storm drains will no longer function properly at Riverside Road and Northcliff Trace.
- 10.0 ft Minor flooding continues. The water is one foot deep in the Ace Sand Company office and begins to flood a warehouse. Flooding expands into the parkings lots of Don White Memorial Park on Riverside Road...and the Azalea Park on Azalea Drive west of Roswell Road. Water begins to flood the tennis courts at the Huntcliff Club across from Azalea Park and is one foot deep over the road leading to the horse stables. The storm drains will stop functioning at Riverside Road and Northcliff Trace.
- 11.0 ft Minor flooding continues with water two feet deep in the Ace Sand Company office and a warehouse. Flooding expands into the parking lots of Don White Memorial Park on Riverside Road...and the Azalea Park on Azalea Drive west of Roswell Road. Water floods the tennis courts at the Huntcliff Club and is two feet deep over the road leading to the horse stables and approaches the north end of the stables. The storm drains stop functioning at Riverside Road and Northcliff Trace and the road begins to flood.
- 12.0 ft Minor flooding expands with water three feet deep in the Ace Sand Company office and a warehouse. Water covers the parking lots of Don White Memorial Park and the Azalea Park. Water floods the tennis courts at the Huntcliff Club and approaches the swimming pool. The water is three feet deep over the road leading to the horse stables which begin to flood. Riverside Road at Northcliff Trace is flooded with one foot of water. These conditions occurred in September 2009.
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Action 8.0 ft
- 8.0 ft The river begins to come out of its banks in low lying areas...especially near the Ace Sand Company. The river level reaches the boardwalk and fishing pier at the Don White Memorial Park under Georgia Highway 400...two miles downstream from the gage. It also reaches the top of the boat ramp at the Azalea Park on Azalea Drive west of Georgia Highway 9.
- Right now 3.83 ft
Flow history at Roswell
Daily values from USGS 02335450, updated every 15 to 60 minutes; NWS forecast for RWLG1 reissued through the day. Provisional.
Highest crests on record at Roswell
12 on record
| Stage | Flow | Date |
|---|---|---|
| 11.96 ft | 21,100 CFS | Sep 21, 2009 |
| 11.51 ft | 19,605 CFS | Oct 11, 2020 |
| 10.37 ft | 15,918 CFS | Sep 27, 2024 |
| 9.97 ft | 14,734 CFS | Dec 28, 2018 |
| 9.94 ft | 14,600 CFS | Sep 17, 2004 |
| 9.89 ft | 14,500 CFS | Mar 17, 1990 |
| 9.77 ft | 14,100 CFS | Jan 4, 2023 |
| 9.77 ft | 14,127 CFS | Sep 8, 2021 |
| 9.76 ft | 14,110 CFS | Apr 19, 2019 |
| 9.75 ft | 13,800 CFS | Apr 13, 1979 |
Crests published by the National Weather Service.
About Chattahoochee River at Roswell
In Georgia — the reading paddlers, anglers and outfitters here check before committing to a shuttle. Shoot the Hooch inside metro Atlanta.
Chattahoochee River at Roswell — common questions
3 questions
Does rain upstream change Chattahoochee River at Roswell quickly?
Yes. It is free-flowing, so rain upstream moves it directly. Several feet in a few hours is normal after a heavy storm.
Is Chattahoochee River at Roswell high or low for this time of year?
The USGS median flow for late September here is 1,570 CFS, from 50 years of record (1976–2026). Today sits inside the middle half of those years, at 111% of the median. The comparison is what makes the raw number mean anything: the same reading is a drought on one river and a flood on another.
How often does this reading update?
USGS transmits from gauge 02335450 every 15 to 60 minutes, and the National Weather Service reissues the flood forecast for RWLG1 a few times a day — more often when the river is rising. This page refreshes from both when you open it. The timestamp is in the gauge's local time.