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Susquehanna River at Unadilla, NY (UNDN6)


Data Type




Inundation Levels
NAVD88 Stage

1,015.7*18.8*
1,014.9*18.0*
Record Crest: 17.72 ft
1,013.917.0
1,012.916.0
1,011.915.0

Major Flooding Begins

1,010.914.0
1,009.913.0

Moderate Flooding Begins

1,008.912.0
1,007.911.0

Minor Flooding Begins

1,006.910.0
1,005.99.0

Near Flooding Begins

* = Extended rating
Weather Forecast Office Binghamton, NY Middle Atlantic River Forecast Center
Hydrograph River at a Glance Download Inundation
Mapping
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Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

Current Stage:
4.1 ft at 11/20/2017 05:00:00 UTC
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Inundation Legend
Depth in feet
USGS Gauge Location Gauge Location
What is UTC time? Map Help

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.

Gauge Information Collapse

Map Overlays

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 04/07/2017
(2) 16.34 ft on 09/09/2011
(3) 11.34 ft on 04/29/2011
(4) 11.07 ft on 10/02/2010
(5) 11.29 ft on 03/24/2010
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Site-specific information:
A report discussing the technical aspects of these maps can be found here. These maps represent unobstructed flow conditions and may be unrepresentative when ice jams and/or debris are in place.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

Flood Impacts 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.
Photos
(1) looking upstream
(2) view of gagehouse
(3) looking downstream
Other Data Sources Collapse
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
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Duration Hydrograph

Duration Hydrograph Legend


Duration Hydrograph of Cumulative Streamflow
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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.
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Page last modified: 21-Dec-2016 5:25 PM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.