GRAND RIVER AT IONIA, MI

Falling over 24 hours: discharge down 16.7%, from 720 to 600 ft³/s. Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.

Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.

This gauge is on Grand River: regulations, guides and shops

USGS gauge page USGS statistics NWS gauge IONM4

Checked Nov 5, 9:49 PM EST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.