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This probabilistic forecast is issued by the Southeast River Forecast Center.
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About this graph
Forecasts for the Chattahoochee River at Highway 141 near Norcross are issued as needed during times of high water, but are not routinely available.
Return to Area Map

Downstream Gauge Downstream Gauge - above Roswell
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 16
Flood Stage: 12
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 27.70 ft on 01/08/1946
(2) 27.10 ft on 12/10/1919
(3) 27.10 ft on 12/13/1919
(4) 23.40 ft on 04/01/1886
(5) 22.20 ft on 04/07/1936
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.01 ft on 10/11/2020
(2) 12.43 ft on 05/19/2013
(3) 14.51 ft on 09/22/2009
(4) 12.47 ft on 03/16/1973
(5) 13.10 ft on 04/05/1964
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.05 ft on 08/25/1925
(2) 0.60 ft on 10/02/1925
(3) 1.49 ft on 09/04/2016
Show More Low Water Records
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
28 Record 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 Major 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 Major 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 Significant 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 Moderate 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 Minor 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 Flood 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 Bankfull 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.
Low Water Impacts Collapse
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1000-1500 cfs Advantageous for recreational opportunities and resources supported by the river as it flows through the Chattahoochee River National Recreational Area (from Buford Dam to Peachtree Creek).
711-850 cfs Paddled from Abbott’s Bridge to Medlock Bridge. No mention of any navigational difficulties.
850-1000 cfs Advantageous for recreational opportunities and resources supported by the river as it flows through the Chattahoochee River National Recreational Area (from Buford Dam to Peachtree Creek).

Other Real-time and/or Archive Data Sources:
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 Hours.

Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Peachtree City/Atlanta Weather Forecast Office
4 Falcon Drive
Peachtree City, GA 30269
(770) 486-1133
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