Mahwah River at Suffern, NY
River level and flood forecast · Rockland County
Normal2.3 ftas of Mon 3:30 PM
The river is 2.7 ft below flood stage (5 ft).
Flow: 32 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 10.5 ft |
| Moderate flood stage | 7 ft |
| Flood stage | 5 ft |
| Action stage | 4.5 ft |
| Record crest (September 16, 1999) | 9.7 ft |
What floods at each level
From the National Weather Service, highest first.
- 10.6 ftMajor flooding along Mahwah River at Suffern. 8 feet of waters into homes basements. Major flooding in homes in the Squires Gate community along the Mahwah River, especially on Lonergan Drive.
- 7 ftModerate flooding along Mahwah River at Suffern communities. Moderate flooding in homes in the Squires Gate community along the Mahwah River, especially on Lonergan Drive.
- 5 ftMinor flooding on homes along the Mahwah River at Suffern. Minor flooding in homes in the Squires Gate community along the Mahwah River, especially on Lonergan Drive.
Highest crests on record
- 9.7 ft — September 16, 1999
Recent crests: 9.7 ft (September 16, 1999)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SUFN6); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.