Snapfinger Creek at Thompson Mill Road near Lithonia, GA
River level and flood forecast · De Kalb County
Normal3.4 ftas of Mon 5:30 PM
The river is 12.6 ft below flood stage (16 ft).
Flow: 20 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 | 28 ft |
| Moderate flood stage | 25 ft |
| Flood stage | 16 ft |
| Action stage | 14 ft |
| Record crest (October 11, 2020) | 17.54 ft |
What floods at each level
From the National Weather Service, highest first.
- 28 ftMajor flooding begins. Widespread inundation flooding affects the woodlands and several homes along the creek upstream and downstream from the gage on Thompson Mill Road. Flood waters reach the foundations and enter garages of a few homes on Thompson Mill Road. Also the water reaches the bottom of the Thompson Mill Road bridge and city officials may need to close it.
- 25 ftModerate flooding begins. The flooding expands further into the woodlands and yards of homes along the creek upstream and downstream from the gage on Thompson Mill Road. The flood waters reach the foundation of a few homes on Thompson Mill Road.
- 22 ftMinor flooding expands further into the woodlands and yards of homes along the creek upstream and downstream from the gage on Thompson Mill Road.
- 18 ftMinor flooding continues to expand further into the woodlands and yards of homes along the creek upstream and downstream from the gage on Thompson Mill Road.
- 16 ftFlood stage is reached. Minor flooding will occur in the woodlands and natural flood plain of the creek upstream and downstream from the gage on Thompson Mill Road.
- 14 ftBankfull conditions are reached upstream and downstream from the gage at Thompson Mill Road.
Highest crests on record
- 17.54 ft — October 11, 2020
- 17.11 ft — December 25, 2015
- 17.09 ft — September 27, 2024
Recent crests: 17.09 ft (September 27, 2024) · 17.54 ft (October 11, 2020) · 17.11 ft (December 25, 2015)
Up and down the river, and nearby
- UpstreamSnapfinger Creek at Redan Road near Glen Haven, GA
- Cobbs Creek at Rainbow Drive near Decatur, GA
- South River at Flakes Mill Road near Snapfinger, GA
- Shoal Creek at Columbia Drive near Atlanta, GA
- Pole Bridge Creek at Evans Mill Road near Lithonia, GA
- Doolittle Creek at Flat Shoals Rd near Decatur, GA
- South River at Klondike Road near Lithonia, GA
- South River at Bouldercrest Road at Atlanta, GA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SFHG1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.