Manalapan Brook at Spotswood, NJ
River level and flood forecast · Middlesex County
The river is 6.3 ft below flood stage (19 ft).
Flow: 323 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.
Get flood alerts for this river
An email when the National Weather Service forecasts Manalapan Brook at Spotswood to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 22 ft |
| Moderate flood stage | 21 ft |
| Flood stage | 19 ft |
| Action stage | 18.5 ft |
| Record crest (August 28, 2011) | 22.22 ft |
What floods at each level
From the National Weather Service, highest first.
- 22 ftThe Immaculate Conception parking lot takes on water. Flooding increases on both Devoe and Mundy Avenues. Residential and township properties take on water. Downstream tides can affect Lake Devoe levels and subsequent flooding.
- 21 ftMundy Avenue flooding increases. Devoe Avenue floods. Both roads become impassable. Flood waters approach residential and township properties. Downstream tides can affect Lake Devoe levels and subsequent flooding.
- 19 ftMundy Avenue, connecting Spotswood and Old Bridge, is subject to flooding and closure. Downstream tides can affect Lake Devoe levels and subsequent flooding.
Highest crests on record
- 22.22 ft — August 28, 2011
- 20.42 ft — July 18, 2005
- 20.31 ft — May 1, 2014
- 20.08 ft — April 16, 2007
- 19.97 ft — September 20, 1989
Recent crests: 19.29 ft (December 19, 2023) · 15.53 ft (September 3, 2021) · 19.35 ft (November 26, 2018) · 19.46 ft (May 28, 2018) · 20.31 ft (May 1, 2014)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SPTN4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.