Nancy Creek at Johnson Ferry Road near Chamblee, GA
River level and flood forecast · De Kalb County
Normal3.6 ftas of Mon 3:30 PM
The river is 12.4 ft below flood stage (16 ft).
Flow: 7 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 24 ft |
| Moderate flood stage | 20 ft |
| Flood stage | 16 ft |
| Action stage | 15 ft |
| Record crest (September 21, 2009) | 22.5 ft |
What floods at each level
From the National Weather Service, highest first.
- 24 ftRecord flooding continues upstream and downstream from the gage on Johnson Ferry Road. A large portion of the Marist High School campus will be flooded...including parking lots...the baseball and football fields...and the parking garage under the gym. Major flooding will continue downstream in Fulton County to Rickenbacker Drive. Many homes on East Powderhorn Road...Hitching Post Trail...Pine Forest Road...Valley Brook Drive and Valley Green Drive will flood. The impacts will be similar to September 2004.
- 23 ftRecord flooding occurs upstream and downstream from the gage on Johnson Ferry Road. A large portion of the Marist High School campus will be flooded...including parking lots...the baseball and football fields...and the parking garage under the gym. Major flooding will continue downstream in Fulton County to Rickenbacker Drive. Many homes on East Powderhorn Road...Hitching Post Trail...Pine Forest Road...Valley Brook Drive and Valley Green Drive will flood. The impacts will be similar to September 2009.
- 22 ftModerate flooding expands into the woodlands and athletic fields upstream and downstream from the gage on Johnson Ferry Road. A large portion of the Marist High School campus will be flooded...including parking lots...baseball fields...and the parking garage under the gym. Major flooding will develop downstream in Fulton County to Rickenbacker Drive. Many homes on East Powderhorn Road...Hitching Post Trail...Pine Forest Road...Valley Brook Drive and Valley Green Drive will be flooded.
- 20 ftModerate flooding begins in the woodlands and athletic fields upstream and downstream from the gage on Johnson Ferry Road. The pedestrian and vehicular bridges to the visitor parking lots on the Marist High School campus will be inundated. The student parking lot and baseball fields will be flooded with 1 to 3 feet of water. Backed up storm drains will likely flood the parking garage under the gym. Moderate flooding continues downstream to Rickenbacker Drive. Some homes will begin to flood near the creek.
- 19 ftMinor flooding expands further into the woodlands and athletic fields upstream and downstream from the gage on Johnson Ferry Road. The water will be around 3 feet over the pedestrian and vehicular bridges to the visitor parking lots on the Marist High School campus. The student parking lot and portions of the baseball fields will be flooded with 1 to 2 feet of water. Moderate flooding develops in residential yards downstream to Rickenbacker Drive. Some crawl spaces or foundations of homes may flood.
- 18 ftMinor flooding continues to expand into the woodlands and athletic fields upstream and downstream from the gage on Johnson Ferry Road. The water will be around two feet over the pedestrian and vehicular bridges to the visitor parking lots on the Marist High School campus. The student parking lot will be flooded and the baseball fields will begin to flood. Minor flooding of residential yards will continue downstream to Rickenbacker Drive.
- 17 ftMinor flooding continues of woodlands and athletic fields upstream and downstream from the gage on Johnson Ferry Road. The water will begin to flow over the pedestrian and vehicular bridges to the visitor parking lots on the Marist High School campus. The student parking lot will begin to flood. Minor flooding of residential yards will continue downstream to Rickenbacker Drive.
- 16 ftFlood stage is reached. Minor flooding of woodlands and athletic fields occurs upstream and downstream from the gage on Johnson Ferry Road. The water level will be hitting the pedestrian and vehicular bridges to the visitor parking lots on the Marist High School campus. This may cause some backwater and erosion eddies to form to the sides of the bridges. Minor flooding of residential yards will likely begin downstream to Rickenbacker Drive.
- 15 ftBankfull conditions are reached upstream and downstream from the gage on Johnson Ferry Road. Water begins to flow into low areas of the woodlands and athletic fields near the creek. The water level will reach the bottom of the pedestrian and vehicular bridges to the visitor parking lots on the Marist High School campus.
Highest crests on record
- 22.5 ft — September 21, 2009
- 17.84 ft — September 27, 2024
- 17.61 ft — August 9, 2017
- 17.21 ft — October 11, 2020
- 16.48 ft — August 30, 2023
Recent crests: 17.84 ft (September 27, 2024) · 16.48 ft (August 30, 2023) · 17.21 ft (October 11, 2020) · 16.19 ft (December 28, 2018) · 17.61 ft (August 9, 2017)
Up and down the river, and nearby
- DownstreamNancy Creek at Rickenbacker Drive at Atlanta, GA
- North Fork Peachtree Creek at Briarwood Road near Atlanta, GA
- North Fork Peachtree Creek at Buford Highway at Atlanta, GA
- Chattahoochee River below Morgan Falls Dam near Roswell, GA
- Chattahoochee River at Powers Ferry + I-285 near Atlanta, GA
- Chattahoochee River above Roswell, GA
- Peachtree Creek at Atlanta, GA
- Rottenwood Creek at Interstate North Parkway near Smyrna, GA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (NCDG1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.