Rivers in Massachusetts
Assabet River at Maynard
Below flood stage
1.47ftStage
Observed Wed, Sep 23, 9:15 AM EDT
- Flood stage
- 5.00 ft
- Forecast crest
- 1.30 ftWed, Sep 23, 2:00 PM EDT
- Record crest
- 8.94 ft1955
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 7.00 ft |
| Moderate flood | 6.00 ft |
| Minor flood | 5.00 ft |
| Action | 4.50 ft |
- 7.00 ftSignificant flooding will affect interests along the river in Maynard, Concord and Hudson. Roadways may become impassable due to flood waters and some properties may need to be evacuated. Follow the directions of local emergency management officials.
- 6.00 ftFlooding is likely in low lying sections along the river including portions of Maynard, Hudson and Concord. Water may approach homes along the river and may force several localized road closures.
- 5.00 ftMinor lowland and backyard flooding is likely along reaches of the river in Maynard, Concord as well as Hudson. Several river roads may also become covered in water.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 12% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 21, 2026.
Crest history
71 crests on NOAA’s list since 1942.
| # | Date | Stage |
|---|---|---|
| 1 | August 20, 1955 | 8.94 ft |
| 2 | March 19, 1968 | 8.15 ft |
| 3 | January 26, 1979 | 8.11 ft |
| 4 | April 7, 1987 | 7.17 ft |
| 5 | March 16, 2010 | 7.14 ft |
| 6 | March 31, 2010 | 7.08 ft |
| 7 | June 7, 1982 | 6.68 ft |
| 8 | September 13, 1954 | 6.47 ft |
| 9 | March 23, 2001 | 6.41 ft |
| 10 | February 26, 2010 | 6.39 ft |
| 11 | April 2, 1993 | 6.37 ft |
| 12 | April 17, 2007 | 6.28 ft |
| 13 | June 3, 1984 | 6.25 ft |
| 14 | February 12, 1970 | 6.14 ft |
| 15 | March 28, 1963 | 6.12 ft |
| 16 | March 27, 1969 | 6.02 ft |
| 17 | April 2, 1962 | 5.99 ft |
| 18 | April 3, 2004 | 5.95 ft |
| 19 | December 20, 2023 | 5.94 ft |
| 20 | March 23, 1972 | 5.89 ft |
| 21 | October 22, 1996 | 5.80 ft |
| 22 | March 9, 2008 | 5.77 ft |
| 23 | March 21, 1948 | 5.75 ft |
| 24 | April 4, 2005 | 5.71 ft |
| 25 | March 29, 1978 | 5.63 ft |
Most recent crests
- January 12, 2024: 5.60 ft
- December 20, 2023: 5.94 ft
- March 15, 2023: 5.14 ft
- September 3, 2021: 5.27 ft
- November 28, 2018: 5.13 ft
- April 8, 2017: 5.20 ft
- June 15, 2013: 5.17 ft
- March 13, 2011: 5.09 ft
- March 8, 2011: 5.56 ft
- March 31, 2010: 7.08 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northeast River Forecast Center. Forecasts are issued routinely year-round. Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.