Grand River at Ionia, MI

Ionia County, Michigan · USGS gauge 04116000 · NWS IONM4 · Grand River flood status · Michigan river levels

Is Grand River at Ionia, MI flooding right now?

Grand River at Ionia, MI measured 9.89 ft on 2026-09-11 00:45:00 UTC. That observation was 11.1 ft below its 21 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height

9.89 ft

as of 2 hours ago

Streamflow

1,600 cfs

data refreshed 9 min ago

Minor flooding here begins at 21 ft, with major flooding at 25 ft. The highest crest on record was 24.69 ft on Sat, Apr 20, 2013.

Streamflow outlook

NOAA National Water Model forecast, issued 15 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	13.5 ft	3.6 ft below
Minor flood	21 ft	11.1 ft below
Moderate flood	23 ft	13.1 ft below
Major flood	25 ft	15.1 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
24.69 ft	2013-04-20
24.4 ft	2018-02-23
24.3 ft	1948-03-21
23.6 ft	1947-04-07
23.43 ft	1960-04-01

Nearby gauges

Gauge	Distance	County
Grand River at Portland, MI	11.2 mi	Ionia County
Flat River at Smyrna, MI	11.3 mi	Ionia County
Looking Glass River at Hinman Rd near Eagle, MI	17.7 mi	Clinton County
Looking Glass River near Eagle, MI	18.5 mi	Clinton County
Fish Creek near Crystal, MI	19.7 mi	Montcalm 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