Grass River at Chase Mills, NY
River level and flood forecast · St. Lawrence County
Normal4.5 ftas of Mon 4 PM
Forecast to rise to 5.0 ft Wed 2 PM.
Flow: 225 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
| Action stage | 7 ft |
| Record crest (August 11, 2024) | 8.48 ft |
Highest crests on record
- 8.48 ft — August 11, 2024
- 8.16 ft — April 9, 2014
- 7.53 ft — September 18, 2005
- 7.44 ft — May 17, 2011
- 7.34 ft — November 1, 2017
Recent crests: 8.48 ft (August 11, 2024) · 7.34 ft (November 1, 2017) · 8.16 ft (April 9, 2014) · 6.42 ft (April 13, 2013) · 6 ft (April 25, 2012)
Up and down the river, and nearby
- Raquette River at Raymondville, NY
- St. Regis River at Brasher Center, NY
- Oswegatchie River near Heuvelton, NY
- West Branch of the St. Regis River near Parishville, NY
- Raquette River at South Colton, NY
- Little Salmon River at Bombay, NY
- Oswegatchie River near Oswegatchie, NY
- West Branch Oswegatchie River near Harrisville, NY
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CHAN6); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.