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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 Tioughnioga River at Cortland are issued routinely year-round.
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Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 12.5
Moderate Flood Stage: 10
Flood Stage: 8
Action Stage: 7
Low Stage (in feet): -9999

Historic Crests
(1) 14.07 ft on 04/03/2005
(2) 13.82 ft on 04/05/1950
(3) 13.56 ft on 12/31/1942
(4) 13.54 ft on 04/05/1956
(5) 13.52 ft on 03/31/1960
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.39 ft on 01/27/2024 (P)
(2) 9.50 ft on 12/19/2023 (P)
(3) 8.52 ft on 05/02/2023 (P)
(4) 8.31 ft on 10/28/2021
(5) 10.84 ft on 10/27/2021
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
14.07 Record flood of April 2005. Widespread inundation and major flood damage occurred along the river from Cortland to Marathon.
13.02 Severe flooding occurs in areas from the City of Cortland to Marathon with 3-4 feet of water covering many city streets in Cortland. Residents in the Kennedy Parkway area are cutoff by floodwaters. This is the level of the January 1996 rain and snow melt flood.
12.5 Major flood stage. Severe flooding occurs in the Village of Marathon with 4-6 feet of water covering most of the streets in town. Many homes and businesses are inundated to the first floor. Widespread basement flooding occurs in the City of Cortland along River Street and the Yaman Park area.
11.5 Widespread, serious flooding occurs in cellars and up to the first floor of homes and businesses in Marathon. Cellar flooding occurs on the east side of Cortland near Yaman Park. Kellogg Road is covered by water 3-6 feet deep in spots.
10 Moderate flood stage. Some flooding begins to affect roads and basements in the Village of Marathon and the Yaman Park area of Cortland.
8 Minor flood stage. Flooding leads to some closures along Kellogg Road to the south of Cortland.
7 The river spills it/s banks into the low lying flood plain. No impact occurs at this stage.
(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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