Mackinaw River near Congerville, IL
River level and flood forecast · Woodford County
Normal1.2 ftas of Mon 2:45 PM
The river is 11.8 ft below flood stage (13 ft).
Flow: 73 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 20 ft |
| Moderate flood stage | 14 ft |
| Flood stage | 13 ft |
| Action stage | 10 ft |
| Record crest (December 4, 1982) | 20.21 ft |
What floods at each level
From the National Weather Service, highest first.
- 13 ftWidespread agricultural flooding occurs.
- 11 ftTyrrell Road, 2 miles northeast of Mackinaw, begins to flood.
- 10 ftMinor flooding begins to low lying areas near the river.
Highest crests on record
- 20.21 ft — December 4, 1982
- 19.61 ft — October 4, 1986
- 19.52 ft — June 3, 1980
- 19.41 ft — July 9, 1951
- 19.09 ft — December 29, 2015
Recent crests: 14.58 ft (August 17, 2026) · 13.1 ft (June 18, 2026) · 14.52 ft (June 13, 2026) · 12.56 ft (April 4, 2026) · 13.4 ft (April 29, 2024)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CNGI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.