Rock River at Afton
Wisconsin — Water Level & Flood Stage
Located in Rock County, Wisconsin on the Rock River. Live water level data from USGS gauge 05430500, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
12.2 ft
12,600 cfs
Moderate Flood
11.1 ft
10,600 cfs
Minor Flood
9 ft
7,160 cfs
Action Stage
8 ft
5,670 cfs
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
13 ft
There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets are impacted including South River Road near Janesville airport, several blocks of Joseph and Charles Streets, and the on ramp to Memorial Drive. The intersection of Wall Street and Main Street is closed. Traxler Park in Janesville is flooded and closed. Water may impact homes on N River Rd. Water touches bottom of Grand Ave bridge.
12.7 ft
There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed. Traxler Park in Janesville is flooded and closed. The intersection of Wall Street and Main Street is flooded. Water backfills into Fisher Creek and hits RR tracks.
12.2 ft
Flooded roads: South River Road near Janesville airport and near W Avalon Rd, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park, bleachers surrounded, the on-ramp to Memorial Drive, a portion of Riverside Drive. Peace Trail and Traxler Park off of Memorial Drive floods. Water approaches homes on N River Rd, water surrounds a home on S Christian Rd and another across the river and along W Bass Creek Rd. RR tracks near W Tripp Rd flood.
11.5 ft
Water surrounds at least 2 homes near the river in the Afton area. Numerous secondary roads in the Afton area are closed to traffic. Floodwaters affect South River Road on the south side of Janesville. Traxler Park off of Memorial Drive in Janesville is flooded, including boat ramp.
11.1 ft
Floodwaters affect Riverside Park and a road in Riverside park on the north side of Janesville and South River Road on the south side of Janesville. Floodwaters affect low spots on South River Rd on the south side of Janesville. Floodwaters affect a home on South Christian Rd on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10.5 ft
Floodwaters affect Riverside Park on the north side of Janesville and South River Road on the south side of Janesville. Floodwaters affect low spots on South River Rd on the south side of Janesville. Floodwaters affect a home on South Christian Rd on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas.
10 ft
Floodwaters affect the property of a home on South Christian Road and S Christian Rd floods. Minor erosional flood damage occurs to lowland and agricultural land adjacent to the river the Afton and Janesville areas.
9 ft
Floodwaters affect property of a home on South Christian Road on the east side of the river in the Afton area. There is minor erosional flood damage to lowland and agricultural land in the Afton and Janesville areas.
8.5 ft
Floodwaters spread into lowland and agricultural land adjacent to the river in the Afton and Janesville areas.
8 ft
Water overflows the lower river banks in the Afton and Janesville areas. The river width is about 240 feet in the area of the gauge.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 20, 2008 | 13.51 ft | 16,700 cfs |
| Jun 20, 2008 | 13.51 ft | 16,700 cfs |
| Feb 4, 1916 | 13.05 ft | -9,999 cfs |
| Feb 4, 1916 | 13.05 ft | -9,999 cfs |
| Jan 22, 2008 | 12.21 ft | 12,600 cfs |
Flood Inundation Map
NOAA has mapped what areas flood at different water levels for this gauge. View the interactive flood inundation map →
About This Gauge
Get Flood Alerts for Rock River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Rock River at Afton?
The Rock River at Afton gauge is maintained by USGS (site 05430500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Rock River at Afton?
The NWS-defined flood stage for Rock River at Afton is 9 feet. Action stage begins at 8 feet. Moderate flooding starts at 11.1 feet, and major flooding at 12.2 feet.
How do I get alerts when Rock River rises?
Download StormCast free on Google Play, go to River Gauges, and add Rock River at Afton to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Rock River at Afton gauge located?
The gauge is located in Rock County, Wisconsin at coordinates 42.6136°N, 89.0717°W. USGS site number: 05430500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
- Gauge reading affected by power generation.