Major Flood
18 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
15 ft
Minor Flood
13 ft
Action Stage
10 ft
What Floods at Each Level
14 ft
Water threatens areas of Janesville south of 8th St.
13 ft
Water affects W 3rd St and may result in evacuation of a trailer court in Janesville. Water also affects much of the Janesville city park as well as nearby gravel roads.
12 ft
Widespread lowland flooding occurs especially within the city park. The flooding covers approximately 6000 acres.
11 ft
Lowland flooding of the city park occurs.
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 9, 2008 | 19.45 ft | 53,400 cfs |
| Jul 21, 1999 | 17.15 ft | 42,200 cfs |
| Mar 2, 1965 | 16.33 ft | — |
About This Gauge
Get Flood Alerts for Cedar 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 Cedar River at Janesville?
The Cedar River at Janesville gauge is maintained by USGS (site 05458500) 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 Cedar River at Janesville?
The NWS-defined flood stage for Cedar River at Janesville is 13 feet. Action stage begins at 10 feet. Moderate flooding starts at 15 feet, and major flooding at 18 feet.
How do I get alerts when Cedar River rises?
Download StormCast free on Google Play, go to River Gauges, and add Cedar River at Janesville to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Cedar River at Janesville gauge located?
The gauge is located in Bremer County, Iowa at coordinates 42.6483°N, 92.4652°W. USGS site number: 05458500. 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