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Advanced Hydrologic Prediction Service
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This probabilistic forecast is issued by the Middle Atlantic River Forecast Center.
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About this graph
Forecasts for the Susquehanna River at Unadilla are issued routinely year-round.

Vertical datum height surveyed by the USGS

Return to Area Map

Zoom Level:14
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) 11.57 ft on 12/19/2023 (P)
(2) 12.35 ft on 04/09/2022
(3) 11.57 ft on 04/07/2017
(4) 16.34 ft on 09/09/2011
(5) 11.34 ft on 04/29/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
KML Image
Gauge LocationGauge Map Marker
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 Collapse
If you notice any errors in the below information, please contact our Webmaster
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.
(1) looking upstream
(2) view of gagehouse
(3) looking downstream

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels - Used to
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)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

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.

Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Binghamton Weather Forecast Office
32 Dawes Drive
Johnson City, NY 13790
(607) 729-1597
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Page last modified: 2-Nov-2020 7:30 PM
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