Big Creek below Hog Wallow at Roswell, GA

River level and flood forecast · Fulton County

Normal2.9 ftas of Mon 3:15 PM

The river is 7.1 ft below flood stage (10 ft).

Flow: 95 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	17 ft
Moderate flood stage	14 ft
Flood stage	10 ft
Action stage	9 ft
Record crest (September 22, 2009)	15.41 ft

What floods at each level

From the National Weather Service, highest first.

17 ftMajor flooding begins with widespread inundation of yards along the creek...mainly upstream from the gage. Water up to two feet deep will be over portions of Oxbo Drive. Further downstream...moderate flooding expands into the Big Creek and Azalea parks along Riverside Road and Azalea Drive. If the Roswell gage on the Chattahoochee River is 6 feet or higher...then the combination of flows will cause the access road to the Huntcliff horse stables across from Azalea Park to flood.
15 ftModerate flooding of yards continues along the creek mainly upstream from the gage. Portions of Oxbo Drive will begin to flood. Further downstream...where the creek merges with the Chattahoochee River...minor flooding continues to expand into the Big Creek and Azalea Parks along Riverside Road and Azalea Drive. If the Roswell gage on the Chattahoochee River is 6.5 feet or higher...then the combination of flows will cause the access road to the Huntcliff horse stables across from Azalea Park to flood.
14 ftModerate flooding of yards begins along the creek...mainly upstream from the gage off Oxbo Drive. Further downstream...where the creek merges with the Chattahoochee River...minor flooding continues to expand into the Big Creek and Azalea parks...near Roswell Road and along Riverside Road and Azalea Drive. If the Roswell gage on the Chattahoochee River is 7 feet or higher...then the combination of flows will cause the access road to the Huntcliff horse stables across from Azalea Park to flood.
12 ftMinor flooding continues to expand further into the woodlands and grassy areas along the creek upstream and downstream from the gage. Further downstream...where the creek merges with the Chattahoochee River...the Big Creek and Azalea parks near Roswell Road and along Riverside Road and Azalea Drive begin to flood. If the Roswell gage on the Chattahoochee River is 7.5 feet or higher...then the combination of flows will cause the access road to the Huntcliff horse stables across from Azalea Park to flood.
10 ftFlood Stage is reached. Minor flooding of woodlands and grassy areas begin along the creek upstream and downstream from the gage off Oxbo Drive in the Roswell area. Also high water continues to encroach into the Big Creek Park two miles downstream along Roswell Road and Riverside Road. If the Roswell gage on the Chattahoochee River is 8 feet or higher...then the combination of flows will cause the access road to the Huntcliff horse stables across from Azalea Park to begin to flood.
9 ftBankfull conditions are reached along the creek upstream and downstream from the gage located off Oxbo Drive near the merger of Hog Wallow Creek. Also high water begins to encroach into the Big Creek Park... two miles downstream along Roswell Road and Riverside Road.

Highest crests on record

15.41 ft — September 22, 2009
12.5 ft — September 17, 2004
12.41 ft — September 27, 2024
11.38 ft — December 29, 2018
11.21 ft — October 11, 2020

Recent crests: 12.41 ft (September 27, 2024) · 10.99 ft (October 12, 2020) · 11.21 ft (October 11, 2020) · 11.08 ft (February 7, 2020) · 11.38 ft (December 29, 2018)

Up and down the river, and nearby

See it on the live map →Radar & warnings for Fulton County NWS gauge page USGS gauge 02335757

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (RWSG1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.