Fox River (Tailwater) at Algonquin, IL
Is Fox River (Tailwater) at Algonquin, IL flooding right now?
Fox River (Tailwater) at Algonquin, IL measured 8.37 ft on 2026-09-22 20:30:00 UTC. That observation was 1.1 ft below its 9.5 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
8.37 ft
Streamflow
2,830 cfs
Minor flooding here begins at 9.5 ft, with major flooding at 12 ft. The highest crest on record was 14 ft on Tue, Jul 5, 1938.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 9 ft | 0.6 ft below |
| Minor flood | 9.5 ft | 1.1 ft below |
| Moderate flood | 10.5 ft | 2.1 ft below |
| Major flood | 12 ft | 3.6 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 14 ft | 1938-07-05 |
| 13.7 ft | 1960-04-06 |
| 13.18 ft | 2017-07-23 |
| 12.7 ft | 2013-04-23 |
| 12.5 ft | 1948-03-24 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Fox River at Algonquin, IL | 0.4 mi | McHenry County |
| Unnamed Tr to Sb Kishwaukee C near Huntley, IL | 6.9 mi | McHenry County |
| Flint Creek near Fox River Grove, IL | 7.0 mi | Lake County |
| Tyler Creek at Elgin, IL | 7.1 mi | Kane County |
| Poplar Creek at Elgin, IL | 9.6 mi | Cook 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.