Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office Binghamton, NY

Middle Atlantic River Forecast Center

Hydrograph

River at a Glance

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Inundation Mapping

Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental) Not Available

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Printable Image About this graph Tabular Data (UTC) Tabular Data (EDT) Datum: NAVD88 Metadata

NOTE: Forecasts for the Susquehanna River at Unadilla are issued routinely year-round. Vertical datum height surveyed by the USGS

Default Hydrograph Scale to Flood Categories   Return to Area Map

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 14.5 Moderate Flood Stage: 13 Flood Stage: 11 Action Stage: 9 Low Stage (in feet): -9999 Historic Crests (1) 17.72 ft on 06/29/2006 (2) 16.60 ft on 03/18/1936 (3) 16.34 ft on 09/09/2011 (4) 16.00 ft on 07/08/1935 (5) 14.64 ft on 03/14/1977 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 12.35 ft on 04/09/2022 (2) 11.57 ft on 04/07/2017 (3) 16.34 ft on 09/09/2011 (4) 11.34 ft on 04/29/2011 (5) 11.07 ft on 10/02/2010 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:14 Legend FEMA Layer Gauge Location Disclaimer Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

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17.7	This was the record flood of June 2006. Deep flooding was widespread and severe throughout Unadilla.
17	The water treatment building and Grand Street in Sidney are inundated.
16.3	Widespread severe flooding caused by the September 2011 flood.
16	Severe flooding occurs throughout most of the Village of Unadilla as water spreads toward Railroad Street. Route 7 flooded in many areas.
14.5	Major 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.
13	Moderate 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	Minor flooding begins to impact fields and some properties in Unadilla between Main Street and River Road.
Photos (1) looking upstream (2) view of gagehouse (3) looking downstream

About This Location

Latitude: 42.321389° N, Longitude: 75.316944° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 11 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 995.71 ft 1006.71 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 995.91 ft 1006.91 ft Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Unadilla

Additional Information

Potential River Levels Used to Estimate the Chance of Flooding and the Range of Possible River Levels 10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS) Note: Use the official hydrograph at the top of this web page for river levels within the next 72 Hours. Click individual graphics to enlarge. Flood Inundation Mapping Server

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Automated Flood Warning Systems Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Information Local Hydrology Information Ensemble River Forecasts Hourly Precipitation

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