Millstone River at Millstone, NJ
River level and flood forecast · Somerset County
The river is 3.6 ft below flood stage (10 ft).
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.
Get flood alerts for this river
An email when the National Weather Service forecasts Millstone River at Millstone to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 16 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 10 ft |
| Action stage | 8 ft |
| Record crest (September 2, 2021) | 22.45 ft |
What floods at each level
From the National Weather Service, highest first.
- 11 ftThe D and R canal is flooded by the Millstone River.
- 10 ftRiver Road between Yorktown and Amsterdam is subject to closure. Canal Road near Suydam Road floods.
- 8 ftCauseways are closed to due flooding.
Highest crests on record
- 22.45 ft — September 2, 2021
- 22.3 ft — September 17, 1999
- 22.3 ft — August 28, 2011
- 20.1 ft — April 16, 2007
- 17.4 ft — March 14, 2010
Recent crests: 14.65 ft (January 10, 2024) · 11.18 ft (December 29, 2023) · 15.37 ft (December 19, 2023) · 12.01 ft (April 8, 2022) · 22.45 ft (September 2, 2021)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MITN4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.