St. Marys River at Rockford OH

Mercer County, Ohio · USGS gauge 04180988 · NWS RFDO1 · St. Marys River flood status · Ohio river levels

Is St. Marys River at Rockford OH flooding right now?

St. Marys River at Rockford OH measured 1.94 ft on 2026-09-11 01:40:00 UTC. That observation was 11.1 ft below its 13 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height
1.94 ft
as of 51 min ago
Streamflow
60 cfs
data refreshed 14 min ago

Minor flooding here begins at 13 ft, with major flooding at 18 ft. The highest crest on record was 14.68 ft on Thu, Jun 18, 2015.

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

CategoryStageCurrent distance
Action10 ft8.1 ft below
Minor flood13 ft11.1 ft below
Moderate flood15 ft13.1 ft below
Major flood18 ft16.1 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

StageDate
14.68 ft2015-06-18
14.56 ft2008-02-08
14.25 ft2011-03-02
13.32 ft2019-04-28
13.28 ft2019-05-19

Nearby gauges

GaugeDistanceCounty
St Marys River at Walcot Street at Willshire OH8.3 miVan Wert County
Blue Creek near Pleasant Mills, IN9.9 miAdams County
Beaver Creek near Celina OH11.6 miMercer County
St. Marys River at Pleasant Mills, IN11.8 miAdams County
Wabash River near New Corydon, Ind12.2 miJay 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