Illinois River at Marseilles, IL
River level and flood forecast · La Salle County
Normal12.3 ftas of Mon 2:45 PM
Flow: 7,890 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
| Action stage | 17 ft |
| Record crest (January 21, 1916) | 35.4 ft |
What floods at each level
From the National Weather Service, highest first.
- 25 ftResidences are threatened near the river in Marseilles.
- 17 ftWater overflows low-lying banks just south of the river.
Highest crests on record
- 35.4 ft — January 21, 1916
- 28.32 ft — May 19, 2020
- 28.27 ft — April 19, 2013
- 28.13 ft — September 16, 2008
- 27.02 ft — February 22, 2018
Recent crests: 28.32 ft (May 19, 2020) · 22.14 ft (September 29, 2019) · 26.53 ft (May 2, 2019) · 19.03 ft (February 8, 2019) · 18.68 ft (June 23, 2018)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MRSI2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.