Tioughnioga River at Cortland

Last updated: Jun 18, 2025, 5:23 PM UTC

No watches, warnings or advisories are in effect for this area.

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Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.

US Geological Survey
Observations courtesy of U.S. Geological Survey

Scale to Flood Categories

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Traces and Thresholds Click to turn on/off display

Observed (OBS) 06/18/2025 11:00 AM EDT

Official Forecast (FCST) 06/17/2025 12:10 PM EDT

Record: 14.1 ft

CATEGORY STAGE

Major Flooding 12.5 ft

Moderate Flooding 10 ft

Minor Flooding 8 ft

Action 7 ft

Reliability of the Forecast:

NOTE: Forecasts are issued routinely year-round.
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	CATEGORY	STAGE
	Major Flooding	12.5 ft
	Moderate Flooding	10 ft
	Minor Flooding	8 ft
	Action	7 ft

Flood Impacts 🅘

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.

Gauge Info

Coordinates	42.6028, -76.1597
RFC	MARFC
State	NY
WFO	BGM
County	Cortland
Data Provider(s)
US Geological Survey	USGS--Water Resources of the United States
USGS	01509000

Gauge Location

Recent Crests

1.	9.12 ft	on 05-08-2025	(P)
2.	8.97 ft	on 03-07-2025	(P)
3.	8.39 ft	on 01-27-2024	(P)
4.	9.50 ft	on 12-19-2023	(P)
5.	8.52 ft	on 05-02-2023	(P)

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

Vertical Datum Table

type	NAVD88
major Flooding	1096.96 ft
moderate Flooding	1094.46 ft
minor Flooding	1092.46 ft
action	1091.46 ft
Latest Value	1088.39 ft
Gauge Zero	1084.46 ft

Gauge Photos

Photo 1 of 3

looking upstream

Probability Information

Photo 1 of 3

Weekly Chance of Exceeding Levels
- About this graph
Chance of Exceeding Levels During Entire Period
- About this graph
Short Range Forecast Uncertainty
About this graph | Product Description Document

Unique Local Info

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)	10 Day (NAEFS)	10 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.

Collaborative Agencies

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.

Resources

Hydrologic Resource Links

Additional Resource Links

WFO Information

Weather Forecast Office

Binghamton

32 Dawes Drive

Johnson City, NY 13790

(607) 729-1597

Ask Questions/Webmaster

Official Homepage

1.	9.12 ft	on 05-08-2025	(P)
2.	8.97 ft	on 03-07-2025	(P)
3.	8.39 ft	on 01-27-2024	(P)
4.	9.50 ft	on 12-19-2023	(P)
5.	8.52 ft	on 05-02-2023	(P)
6.	8.31 ft	on 10-28-2021
7.	10.84 ft	on 10-27-2021
8.	10.31 ft	on 08-20-2021
9.	11.57 ft	on 12-26-2020
10.	9.75 ft	on 11-02-2019
11.	8.64 ft	on 03-31-2018
12.	8.15 ft	on 07-15-2017
13.	8.12 ft	on 05-07-2017
14.	8.20 ft	on 04-08-2017
15.	8.22 ft	on 02-26-2017
16.	8.18 ft	on 04-14-2015
17.	9.38 ft	on 04-10-2015
18.	9.09 ft	on 04-04-2015
19.	8.53 ft	on 03-31-2014
20.	9.83 ft	on 07-02-2013
21.	8.36 ft	on 02-01-2013
22.	9.88 ft	on 09-09-2011
23.	8.48 ft	on 04-17-2011
24.	8.03 ft	on 04-06-2011
25.	8.23 ft	on 03-19-2011
26.	10.95 ft	on 03-11-2011
27.	11.31 ft	on 10-01-2010
28.	9.01 ft	on 01-26-2010
29.	8.95 ft	on 03-10-2009
30.	8.07 ft	on 12-29-2008
31.	8.19 ft	on 03-09-2008
32.	8.54 ft	on 02-07-2008
33.	9.54 ft	on 03-27-2007
34.	9.85 ft	on 03-15-2007
35.	8.31 ft	on 11-17-2006
36.	10.95 ft	on 06-28-2006
37.	14.07 ft	on 04-03-2005
38.	8.48 ft	on 01-15-2005
39.	8.61 ft	on 03-28-2004
40.	9.19 ft	on 03-07-2004
41.	8.47 ft	on 12-12-2003
42.	9.33 ft	on 03-21-2003
43.	8.91 ft	on 06-24-2001
44.	10.58 ft	on 04-09-2001
45.	10.14 ft	on 05-14-2000
46.	10.96 ft	on 02-28-2000
47.	9.78 ft	on 01-24-1999
48.	10.34 ft	on 01-08-1998
49.	8.56 ft	on 01-07-1998
50.	10.45 ft	on 12-02-1996
51.	10.13 ft	on 11-09-1996
52.	13.02 ft	on 01-20-1996
53.	10.00 ft	on 04-17-1994
54.	9.61 ft	on 04-14-1994
55.	8.90 ft	on 04-17-1993
56.	12.25 ft	on 04-11-1993
57.	9.86 ft	on 04-01-1993
58.	8.30 ft	on 02-17-1990
59.	9.28 ft	on 03-26-1988
60.	11.01 ft	on 03-15-1986
61.	9.40 ft	on 04-06-1984
62.	11.05 ft	on 02-15-1984
63.	10.49 ft	on 12-14-1983
64.	8.22 ft	on 04-25-1983
65.	12.50 ft	on 10-28-1981
66.	9.45 ft	on 02-21-1981
67.	10.45 ft	on 03-22-1980
68.	12.42 ft	on 03-06-1979
69.	8.76 ft	on 01-02-1979
70.	8.93 ft	on 04-05-1978
71.	9.14 ft	on 04-02-1978
72.	9.66 ft	on 10-18-1977
73.	9.53 ft	on 09-21-1977
74.	8.58 ft	on 03-30-1977
75.	12.12 ft	on 03-14-1977
76.	9.16 ft	on 10-10-1976
77.	9.30 ft	on 04-16-1976
78.	8.58 ft	on 02-19-1976
79.	8.88 ft	on 09-26-1975
80.	9.94 ft	on 02-25-1975
81.	11.11 ft	on 04-05-1974
82.	8.69 ft	on 12-07-1972
83.	10.47 ft	on 06-23-1972
84.	8.26 ft	on 04-18-1972
85.	8.19 ft	on 04-14-1972
86.	9.33 ft	on 04-14-1971
87.	8.95 ft	on 04-10-1970
88.	8.61 ft	on 04-03-1970
89.	8.42 ft	on 04-06-1969
90.	8.62 ft	on 03-24-1968
91.	12.49 ft	on 03-05-1964
92.	10.34 ft	on 03-27-1963
93.	9.66 ft	on 04-01-1962
94.	13.00 ft	on 02-26-1961
95.	13.52 ft	on 03-31-1960
96.	11.37 ft	on 02-11-1960
97.	12.19 ft	on 04-03-1959
98.	11.71 ft	on 01-22-1959
99.	11.66 ft	on 04-07-1958
100.	11.03 ft	on 01-23-1957
101.	13.54 ft	on 04-05-1956
102.	11.16 ft	on 03-08-1956
103.	12.77 ft	on 03-12-1955
104.	10.93 ft	on 03-02-1955
105.	9.43 ft	on 02-18-1954
106.	9.40 ft	on 02-22-1953
107.	9.33 ft	on 03-12-1952
108.	11.97 ft	on 03-31-1951
109.	13.82 ft	on 04-05-1950
110.	11.79 ft	on 03-29-1950
111.	9.08 ft	on 01-06-1949
112.	12.40 ft	on 03-22-1948
113.	12.73 ft	on 03-20-1948
114.	10.67 ft	on 03-17-1948
115.	11.11 ft	on 06-03-1947
116.	12.16 ft	on 04-07-1947
117.	10.97 ft	on 03-25-1947
118.	10.62 ft	on 03-08-1946
119.	9.01 ft	on 03-22-1945
120.	12.28 ft	on 03-17-1945
121.	11.22 ft	on 03-17-1944
122.	12.73 ft	on 03-17-1943
123.	13.56 ft	on 12-31-1942
124.	11.32 ft	on 03-17-1942
125.	10.88 ft	on 03-09-1942
126.	12.49 ft	on 04-06-1941
127.	13.33 ft	on 04-09-1940
128.	11.58 ft	on 04-05-1940
129.	10.97 ft	on 04-01-1940
130.	10.45 ft	on 02-21-1939

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
6.	13.33 ft	on 04-09-1940
7.	13.02 ft	on 01-20-1996
8.	13.00 ft	on 02-26-1961
9.	12.77 ft	on 03-12-1955
10.	12.73 ft	on 03-20-1948
11.	12.73 ft	on 03-17-1943
12.	12.50 ft	on 10-28-1981
13.	12.49 ft	on 04-06-1941
14.	12.49 ft	on 03-05-1964
15.	12.42 ft	on 03-06-1979
16.	12.40 ft	on 03-22-1948
17.	12.28 ft	on 03-17-1945
18.	12.25 ft	on 04-11-1993
19.	12.19 ft	on 04-03-1959
20.	12.16 ft	on 04-07-1947
21.	12.12 ft	on 03-14-1977
22.	11.97 ft	on 03-31-1951
23.	11.79 ft	on 03-29-1950
24.	11.71 ft	on 01-22-1959
25.	11.66 ft	on 04-07-1958
26.	11.58 ft	on 04-05-1940
27.	11.57 ft	on 12-26-2020
28.	11.37 ft	on 02-11-1960
29.	11.32 ft	on 03-17-1942
30.	11.31 ft	on 10-01-2010
31.	11.22 ft	on 03-17-1944
32.	11.16 ft	on 03-08-1956
33.	11.11 ft	on 06-03-1947
34.	11.11 ft	on 04-05-1974
35.	11.05 ft	on 02-15-1984
36.	11.03 ft	on 01-23-1957
37.	11.01 ft	on 03-15-1986
38.	10.97 ft	on 03-25-1947
39.	10.97 ft	on 04-01-1940
40.	10.96 ft	on 02-28-2000
41.	10.95 ft	on 06-28-2006
42.	10.95 ft	on 03-11-2011
43.	10.93 ft	on 03-02-1955
44.	10.88 ft	on 03-09-1942
45.	10.84 ft	on 10-27-2021
46.	10.67 ft	on 03-17-1948
47.	10.62 ft	on 03-08-1946
48.	10.58 ft	on 04-09-2001
49.	10.49 ft	on 12-14-1983
50.	10.47 ft	on 06-23-1972
51.	10.45 ft	on 12-02-1996
52.	10.45 ft	on 02-21-1939
53.	10.45 ft	on 03-22-1980
54.	10.34 ft	on 03-27-1963
55.	10.34 ft	on 01-08-1998
56.	10.31 ft	on 08-20-2021
57.	10.14 ft	on 05-14-2000
58.	10.13 ft	on 11-09-1996
59.	10.00 ft	on 04-17-1994
60.	9.94 ft	on 02-25-1975
61.	9.88 ft	on 09-09-2011
62.	9.86 ft	on 04-01-1993
63.	9.85 ft	on 03-15-2007
64.	9.83 ft	on 07-02-2013
65.	9.78 ft	on 01-24-1999
66.	9.75 ft	on 11-02-2019
67.	9.66 ft	on 04-01-1962
68.	9.66 ft	on 10-18-1977
69.	9.61 ft	on 04-14-1994
70.	9.54 ft	on 03-27-2007
71.	9.53 ft	on 09-21-1977
72.	9.50 ft	on 12-19-2023	(P)
73.	9.45 ft	on 02-21-1981
74.	9.43 ft	on 02-18-1954
75.	9.40 ft	on 02-22-1953
76.	9.40 ft	on 04-06-1984
77.	9.38 ft	on 04-10-2015
78.	9.33 ft	on 03-12-1952
79.	9.33 ft	on 04-14-1971
80.	9.33 ft	on 03-21-2003
81.	9.30 ft	on 04-16-1976
82.	9.28 ft	on 03-26-1988
83.	9.19 ft	on 03-07-2004
84.	9.16 ft	on 10-10-1976
85.	9.14 ft	on 04-02-1978
86.	9.12 ft	on 05-08-2025	(P)
87.	9.09 ft	on 04-04-2015
88.	9.08 ft	on 01-06-1949
89.	9.01 ft	on 01-26-2010
90.	9.01 ft	on 03-22-1945
91.	8.97 ft	on 03-07-2025	(P)
92.	8.95 ft	on 03-10-2009
93.	8.95 ft	on 04-10-1970
94.	8.93 ft	on 04-05-1978
95.	8.91 ft	on 06-24-2001
96.	8.90 ft	on 04-17-1993
97.	8.88 ft	on 09-26-1975
98.	8.76 ft	on 01-02-1979
99.	8.69 ft	on 12-07-1972
100.	8.64 ft	on 03-31-2018
101.	8.62 ft	on 03-24-1968
102.	8.61 ft	on 04-03-1970
103.	8.61 ft	on 03-28-2004
104.	8.58 ft	on 02-19-1976
105.	8.58 ft	on 03-30-1977
106.	8.56 ft	on 01-07-1998
107.	8.54 ft	on 02-07-2008
108.	8.53 ft	on 03-31-2014
109.	8.52 ft	on 05-02-2023	(P)
110.	8.48 ft	on 04-17-2011
111.	8.48 ft	on 01-15-2005
112.	8.47 ft	on 12-12-2003
113.	8.42 ft	on 04-06-1969
114.	8.39 ft	on 01-27-2024	(P)
115.	8.36 ft	on 02-01-2013
116.	8.31 ft	on 10-28-2021
117.	8.31 ft	on 11-17-2006
118.	8.30 ft	on 02-17-1990
119.	8.26 ft	on 04-18-1972
120.	8.23 ft	on 03-19-2011
121.	8.22 ft	on 02-26-2017
122.	8.22 ft	on 04-25-1983
123.	8.20 ft	on 04-08-2017
124.	8.19 ft	on 04-14-1972
125.	8.19 ft	on 03-09-2008
126.	8.18 ft	on 04-14-2015
127.	8.15 ft	on 07-15-2017
128.	8.12 ft	on 05-07-2017
129.	8.07 ft	on 12-29-2008
130.	8.03 ft	on 04-06-2011