Illinois River at Marseilles, IL

LaSalle County, Illinois · USGS gauge 05543500 · NWS MRSI2 · Illinois River flood status · Illinois river levels

Is Illinois River at Marseilles, IL flooding right now?

Illinois River at Marseilles, IL measured 13.84 ft on 2026-09-22 20:45:00 UTC. No NWS minor flood stage is published for this gauge. Its action level is 17 ft; action level is not flood stage.

Gauge height

13.84 ft

as of 62 min ago

Streamflow

14,900 cfs

data refreshed 16 min ago

The highest crest on record was 35.4 ft on Fri, Jan 21, 1916.

Streamflow outlook

NOAA National Water Model forecast, issued 10 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

Category	Stage	Current distance
Action	17 ft	3.2 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

Stage	Date
35.4 ft	1916-01-21
28.32 ft	2020-05-19
28.27 ft	2013-04-19
28.13 ft	2008-09-16
27.02 ft	2018-02-22

Nearby gauges

Gauge	Distance	County
Fox River at Dayton, IL	5.4 mi	LaSalle County
Illinois River at Seneca, IL	5.6 mi	LaSalle County
Hanson Gravel Pit at Culvert near Morris, IL	13.0 mi	Grundy County
Vermilion River near Leonore, IL	13.8 mi	LaSalle County
Illinois River at Morris, IL	15.1 mi	Grundy County

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.

Sources: USGS monitoring location · NWS gauge & forecast