Rivers in New York
Susquehanna River at Unadilla
Below flood stage
2.95ftStage
Observed Sat, Sep 26, 11:00 PM EDT
- Flood stage
- 11.00 ft
- Forecast crest
- 3.30 ftMon, Sep 28, 8:00 AM EDT
- Record crest
- 17.72 ft2006
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 14.50 ft |
| Moderate flood | 13.00 ft |
| Minor flood | 11.00 ft |
| Action | 9.00 ft |
- 17.70 ftThis was the record flood of June 2006. Deep flooding was widespread and severe throughout Unadilla.
- 17.50 ftMain Street in Sidney is flooded up to Smith Street.
- 17.00 ftThe water treatment building and the Press building in Sidney are inundated.
- 16.30 ftWidespread severe flooding occurred during the September 2011 flood.
- 16.00 ftSevere flooding occurs throughout most of the Village of Unadilla as water spreads toward Railroad Street. Route 7 flooded in many areas. Clinton St., Grand St., and Avery St., along with the fire station in Sidney are flooded.
- 15.00 ftSherman Ave., Bridge St., Willow St., and Cross Street in Sidney are flooded. Amphenol and the Waste Water Treatment Plant in Sidney are flooded.
- 14.50 ftMajor flood stage. Several locations in Unadilla on the south side of Main Street are flooded. Water crosses Route 7 near Hopkins Street and floods homes to the north. Adams, Gilbert, Weir, Union Streets and the American Legion in Sidney are flooded.
- 13.00 ftModerate flood stage. Basement flooding and some first floor dwellings between Main Street and River Road are affected by flooding. This includes properties on Hopkins, Church, Dart and Mill Street.
- 11.00 ftMinor flooding begins to impact fields and some properties in Unadilla between Main Street and River Road.
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 August 28, 2026.
Crest history
59 crests on NOAA’s list since 1935.
| # | Date | Stage |
|---|---|---|
| 1 | June 29, 2006 | 17.72 ft |
| 2 | March 18, 1936 | 16.60 ft |
| 3 | September 9, 2011 | 16.34 ft |
| 4 | July 8, 1935 | 16.00 ft |
| 5 | March 14, 1977 | 14.64 ft |
| 6 | April 4, 1960 | 14.25 ft |
| 7 | January 19, 1996 | 14.24 ft |
| 8 | October 18, 1977 | 14.13 ft |
| 9 | December 30, 1942 | 13.94 ft |
| 10 | March 6, 1979 | 13.90 ft |
| 11 | September 22, 1938 | 13.76 ft |
| 12 | April 3, 2005 | 13.68 ft |
| 13 | January 10, 1998 | 13.60 ft |
| 14 | March 31, 1940 | 13.54 ft |
| 15 | March 31, 1993 | 13.49 ft |
| 16 | January 22, 1959 | 13.42 ft |
| 17 | March 16, 1986 | 13.18 ft |
| 18 | March 22, 1948 | 13.18 ft |
| 19 | March 6, 1964 | 13.17 ft |
| 20 | April 2, 1962 | 12.83 ft |
| 21 | February 28, 2000 | 12.73 ft |
| 22 | March 27, 1963 | 12.62 ft |
| 23 | March 26, 1979 | 12.62 ft |
| 24 | April 6, 1956 | 12.38 ft |
| 25 | April 9, 2022 | 12.35 ft |
Most recent crests
- December 19, 2023: 11.57 ft
- April 9, 2022: 12.35 ft
- April 7, 2017: 11.57 ft
- September 9, 2011: 16.34 ft
- April 29, 2011: 11.34 ft
- October 2, 2010: 11.07 ft
- March 24, 2010: 11.29 ft
- March 9, 2008: 11.61 ft
- June 29, 2006: 17.72 ft
- April 3, 2005: 13.68 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.