Oswegatchie River near Heuvelton, NY
River level and flood forecast · St. Lawrence County
The river is 6.4 ft below flood stage (7.5 ft).
Forecast to rise to 1.9 ft Thu 8 AM, below the 7.5 ft flood stage.
Flow: 369 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 11:14 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Flood stage | 7.5 ft |
| Action stage | 6.5 ft |
| Record crest (April 6, 1960) | 10.36 ft |
What floods at each level
From the National Weather Service, highest first.
- 7.5 ftLow lying areas of River Road and Backus Camp Road between Rensselaer Falls and Heuvelton will flood. Lowland flooding of fields and cropland along the river will also occur. Downstream in Ogdensburg, low lying portions of Simms Camp Road and the Maple City recreational path will be inundated. Shoreline flooding is also possible on Black Lake.
- 6.5 ftLowland flooding of fields and cropland along the river from Rensselaer Falls to Ogdensburg may occur.
Highest crests on record
- 10.36 ft — April 6, 1960
- 9.33 ft — April 9, 1947
- 9.19 ft — March 17, 1977
- 9.11 ft — February 23, 1954
- 9.1 ft — January 11, 1930
Recent crests: 7.19 ft (August 12, 2024) · 6.65 ft (March 23, 2022) · 5.89 ft (March 30, 2021) · 5.83 ft (March 13, 2020) · 5.97 ft (November 4, 2019)
Up and down the river, and nearby
- UpstreamWest Branch Oswegatchie River near Harrisville, NY
- Grass River at Chase Mills, NY
- Raquette River at South Colton, NY
- Raquette River at Raymondville, NY
- Oswegatchie River near Oswegatchie, NY
- West Branch of the St. Regis River near Parishville, NY
- St. Regis River at Brasher Center, NY
- Little Salmon River at Bombay, NY
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (HEUN6); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.