Big Brook at Marlboro, NJ
River level and flood forecast · Monmouth County
Flow: 10 cubic feet per second (USGS).
River camera
Watch the time-lapse
Camera by the U.S. Geological Survey. Most take a picture every hour, some every few minutes; many stop at night.
The last 7 days and the forecast
NWS forecast issued Mon, Jan 1, 12 AM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Big Brook at Marlboro to flood, when it floods, and when it's over.
Flood stages
| Action stage | 17 ft |
| Record crest (September 20, 1989) | 20.16 ft |
What floods at each level
From the National Weather Service, highest first.
- 17 ftWater overtops banks and floods adjacent floodplain.
Highest crests on record
- 20.16 ft — September 20, 1989
- 19.7 ft — August 28, 2011
- 19.24 ft — August 6, 1990
- 19.14 ft — March 4, 1991
- 18.91 ft — September 1, 2021
Recent crests: 18.91 ft (September 1, 2021) · 18.46 ft (May 1, 2014) · 18.7 ft (December 27, 2012) · 19.7 ft (August 28, 2011) · 18.38 ft (March 9, 1998)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BBMN4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.