Rivers in New York
Unadilla River at Rockdale
Below flood stage
4.39ftStage
Observed Tue, Sep 29, 4:30 PM EDT
- Flood stage
- 11.00 ft
- Forecast crest
- 4.30 ftTue, Sep 29, 8:00 PM EDT
- Record crest
- 14.22 ft2011
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 13.00 ft |
| Moderate flood | 12.00 ft |
| Minor flood | 11.00 ft |
| Action | 8.00 ft |
- 14.22 ftRecord flood event of september 2011. Widespread and severe flood inundation occurred to residences and businesses along the river. Millions of dollars in damage were reported.
- 13.96 ftFlood level of June 2006. Flooding was widespread and severe with water several feet deep in many locations near the river along Route 8 from Mount Upton to Sidney.
- 13.00 ftMajor flood stage. Much of Route 8 is flooded north and south of Rockdale including several residences and businesses. Flooding threatens residences in Mount Upton along Bridge Street. Damages at this stage are typically severe.
- 12.60 ftNumerous cellars along the river are flooded.
- 12.00 ftModerate flood stage. Several homes and businesses are flooded in various spots along Route 8 between Rockwells Mills and Sidney. Flooding reaches properties and residences on County Route 1 at Rockdale. Hitching Post Lane floods. Residences on County Road 1B and the lower parts of Tall Pines Campground are flooded.
- 11.00 ftFlood stage. Widespread flooding of farmland occurs along the river. County Route 8 at the intersection of High Bridge Road is flooded.
Flood outlook
Chance of flooding, October to December
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 28, 2026.
Crest history
30 crests on NOAA’s list since 1932.
| # | Date | Stage |
|---|---|---|
| 1 | September 8, 2011 | 14.22 ft |
| 2 | June 29, 2006 | 13.96 ft |
| 3 | December 31, 1942 | 12.98 ft |
| 4 | March 14, 1977 | 12.64 ft |
| 5 | March 26, 1979 | 12.62 ft |
| 6 | March 6, 1964 | 12.30 ft |
| 7 | January 19, 1996 | 12.24 ft |
| 8 | March 18, 1943 | 12.07 ft |
| 9 | April 1, 1940 | 11.92 ft |
| 10 | April 11, 1993 | 11.89 ft |
| 11 | March 21, 1948 | 11.86 ft |
| 12 | April 4, 2005 | 11.83 ft |
| 13 | February 28, 2000 | 11.81 ft |
| 14 | September 2, 1950 | 11.77 ft |
| 15 | October 18, 1977 | 11.63 ft |
| 16 | April 5, 1960 | 11.61 ft |
| 17 | December 14, 1983 | 11.60 ft |
| 18 | March 31, 1993 | 11.60 ft |
| 19 | April 6, 1956 | 11.54 ft |
| 20 | February 26, 1961 | 11.54 ft |
| 21 | February 16, 1984 | 11.48 ft |
| 22 | March 16, 1986 | 11.47 ft |
| 23 | January 22, 1959 | 11.36 ft |
| 24 | January 9, 1998 | 11.16 ft |
| 25 | April 9, 1940 | 11.16 ft |
Most recent crests
- September 8, 2011: 14.22 ft
- June 29, 2006: 13.96 ft
- April 4, 2005: 11.83 ft
- April 10, 2001: 11.04 ft
- February 28, 2000: 11.81 ft
- January 9, 1998: 11.16 ft
- January 19, 1996: 12.24 ft
- April 11, 1993: 11.89 ft
- March 31, 1993: 11.60 ft
- March 16, 1986: 11.47 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Middle Atlantic 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.