St. Marys River at Rockford, OH
River level and flood forecast · Mercer County
Normal1.7 ftas of Mon 3:40 PM
The river is 11.3 ft below flood stage (13 ft).
Flow: 49 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Thu, Sep 24, 11:21 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 18 ft |
| Moderate flood stage | 15 ft |
| Flood stage | 13 ft |
| Action stage | 10 ft |
| Record crest (June 18, 2015) | 14.68 ft |
What floods at each level
From the National Weather Service, highest first.
- 20 ftWater floods several homes and businesses in the north and east sides of Rockford, primarily in the area of Bridge Street, as well as near East Street and locations along Route 33 east of town. High water extends further onto Route 118 north of Rockford near Route 117 and Route 127 at the St. Marys Bridge is closed.
- 16 ftWater begins to flood some structures, primarily in the area of Route 33 and West Street, as well as near Route 33 and East Street on the southeast side of Rockford. In addition, Route 117 near Route 118 north of Rockford and Route 127 at the St. Marys Bridge are closed.
- 15 ftWater nearly floods several homes and businesses, primarily in the area of Route 33 and West Street, as well as near Route 33 and East Street on the southeast side of Rockford. In addition, Route 117 near Route 118 north of Rockford and Route 127 at the St. Marys Bridge are closed.
- 14.7 ftThis stage is roughly the height of the FEMA 1 percent flood level. Backwater creek flooding rises onto property between West Bridge Street and North Streets.
- 14 ftSeveral roads become flooded, with Route 127 at the St. Marys bridge closed due to high water. Water extends well onto property along the river, approaching some homes and businesses. No homes are flooded at this level.
- 13 ftState Route 117 near Route 118 north of Rockford is water-covered and closed.
Highest crests on record
- 14.68 ft — June 18, 2015
- 14.56 ft — February 8, 2008
- 14.25 ft — March 2, 2011
- 13.32 ft — April 28, 2019
- 13.28 ft — May 19, 2019
Recent crests: 13.28 ft (May 19, 2019) · 13.32 ft (April 28, 2019) · 14.68 ft (June 18, 2015) · 14.25 ft (March 2, 2011) · 14.56 ft (February 8, 2008)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (RFDO1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.