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Chattahoochee River at US 41 at Atlanta, GA

River level and flood forecast · Cobb County

Normal4.4 ftas of Mon 3:45 PM

The river is 9.6 ft below flood stage (14 ft).

The last 7 days and the forecast

05101520TueWedThuFriSatSunMonAction 12 ftFlood 14 ftModerate 18 ftMajor 20 ftNowObserved (ft)NWS forecast

NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

Major flood stage20 ft
Moderate flood stage18 ft
Flood stage14 ft
Action stage12 ft
Record crest (September 22, 2009)28.59 ft

What floods at each level

From the National Weather Service, highest first.

  • 29 ftRecord flooding occurs with widespread inundation flooding of the woodlands and large portions of the Chattahoochee National Recreation Area upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 14 feet deep over portions of the access road to the recreation area. Portions of the parking lot will be under 11 feet of water. The restrooms at the recreation area will be flooded 9 feet deep with only the roof exposed. This will be worse than the September 2009 flood event.
  • 28 ftMajor flooding expands with widespread inundation flooding of the woodlands and large portions of the Chattahoochee National Recreation Area upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 13 feet deep over portions of the access road to the recreation area. Portions of the parking lot will be under 10 feet of water. The restrooms at the recreation area will be flooded 8 feet deep with only the roof exposed. This will be similar to the September 2009 flood event.
  • 26 ftMajor flooding expands with widespread inundation flooding of the woodlands and large portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 11 feet deep over portions of the access road to the recreation area. Portions of the parking lot will be under 8 feet of water. The restrooms at the recreation area will be flooded 6 feet deep.
  • 24 ftMajor flooding continues with widespread inundation flooding of the woodlands and large portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 9 feet deep over portions of the access road to the recreation area. Portions of the parking lot will be under 6 feet of water. The restrooms at the recreation area will be flooded 4 feet deep.
  • 22 ftMajor flooding continues with widespread inundation flooding of the woodlands and large portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 7 feet deep over portions of the access road to the recreation area. Portions of the parking lot will be under 4 feet of water. The restrooms at the recreation area will be flooded two feet deep.
  • 20 ftMajor flooding begins. Widespread inundation flooding occurs in the woodlands and large portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 5 feet deep over portions of the access road to the recreation area. Portions of the parking lot will be under two feet of water. The restrooms at the recreation area will begin to flood.
  • 18 ftModerate flooding begins. Significant flooding occurs in the woodlands and affects large portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will be around 3 feet deep over portions of the access road to the recreation area. Portions of the parking lot will begin to flood.
  • 16 ftMinor flooding expands in the woodlands and affects large portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will be around one foot deep over portions of the access road to the recreation area.
  • 14 ftFlood stage is reached. Minor flooding occurs in the woodlands and portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway. The flood waters will reach the top of the concrete boat ramp in the recreation area.
  • 12 ftBankfull conditions occur in the woodlands and low lying portions of the Chattahoochee National Recreation Area along the river upstream and downstream from the gage on Cobb Parkway.

Highest crests on record

  1. 28.59 ft — September 22, 2009
  2. 24.13 ft — September 27, 2024
  3. 23.65 ft — March 17, 1990
  4. 22.99 ft — April 13, 1979
  5. 20.5 ft — October 11, 2020

Recent crests: 16.46 ft (February 13, 2025) · 24.13 ft (September 27, 2024) · 15.71 ft (March 6, 2024) · 14.86 ft (January 9, 2024) · 16.89 ft (January 4, 2023)

Up and down the river, and nearby

See it on the live map →Radar & warnings for Cobb CountyNWS gauge pageUSGS gauge 02335990

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (VIXG1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.