Rock River at Byron, IL
Is Rock River at Byron, IL flooding right now?
Rock River at Byron, IL measured 9.21 ft on 2026-09-22 20:15:00 UTC. That observation was 3.8 ft below its 13 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
9.21 ft
Streamflow
12,000 cfs
Minor flooding here begins at 13 ft, with major flooding at 16 ft. The highest crest on record was 17.8 ft on Fri, Apr 20, 1973.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 10.5 ft | 1.3 ft below |
| Minor flood | 13 ft | 3.8 ft below |
| Moderate flood | 14 ft | 4.8 ft below |
| Major flood | 16 ft | 6.8 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 17.8 ft | 1973-04-20 |
| 17.08 ft | 2013-04-20 |
| 16.64 ft | 2019-03-16 |
| 16.5 ft | 2010-07-25 |
| 16.12 ft | 2000-06-14 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Rock River above Dam at Rockford, IL | 12.9 mi | Winnebago County |
| Keith Creek at Eighth Street at Rockford, IL | 13.0 mi | Winnebago County |
| Kishwaukee River near Perryville, IL | 14.0 mi | Winnebago County |
| Rock River at Auburn St at Rockford | 15.1 mi | Winnebago County |
| South Branch Kishwaukee River near Fairdale IL | 18.2 mi | DeKalb County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.