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Chemung River at Chemung, NY (CMGN6)


Data Type




Inundation Levels
NAVD88 Stage

Record Crest: 31.62 ft
809.731.6
809.131.0
808.130.0
807.129.0
806.128.0
805.127.0
804.126.0
803.125.0

Major Flooding Begins

802.124.0
801.123.0
800.122.0
799.121.0

Moderate Flooding Begins

798.120.0
797.018.9
796.118.0
795.117.0

Minor Flooding Begins

794.116.0
793.115.0
792.114.0
791.113.0

Near Flooding Begins

790.112.0

Below 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:
4.0 ft at 12/05/2019 21:00:00 UTC
Selected Inundation
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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: 24
Moderate Flood Stage: 20
Flood Stage: 16
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests
(1) 31.62 ft on 06/23/1972
(2) 24.10 ft on 09/27/1975
(3) 23.97 ft on 05/28/1946
(4) 20.44 ft on 03/06/1964
(5) 20.13 ft on 10/15/1955
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 16.63 ft on 03/15/2007
(2) 17.40 ft on 04/03/2005
(3) 18.45 ft on 09/18/2004
(4) 16.05 ft on 09/10/2004
(5) 18.52 ft on 11/09/1996
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:

The purpose of a flood forecast inundation map is to communicate flood risk based on best available information at the time of map development. This flood forecast inundation map has been compiled using the best information available and is believed to be accurate; however, its preparation required many assumptions. Actual conditions during a flood event may vary from those modeled in the map, including erosion and sedimentation. The limits of flooding shown should only be used as a guideline for emergency planning and response actions. Actual areas inundated will depend on specific flooding conditions.

The risk of flooding behind flood risk management (FRM) structures (such as levees, floodwalls, closures, etc.) depends on many factors that cannot be entirely predicted in advance. These factors include whether the FRM structure overtops, length of time the structure overtops, and whether the overtopping leads to breach formation.

The mapping is based on ground elevation data from: FEMA Chemung Watershed 2011; PASDA North 2008; County Chemung Watershed 2005; and County Chemung Watershed 2002

Flood Risk Management Structures (red lines) – Shows levee and floodwall systems that reduce the flood risk.  The area behind the FRM structures is not shown as being flooded until the structure is over-topped.

Flood Risk Management Risk Area (yellow shaded area) - Shows the area with flood risk reduced by the flood risk management structures

Note:  Dams upstream in the Tioga River Watershed provide some flood mitigation.  Inundation maps would not be representative in the case of a dam breach.   

Note:   Depths shown are only accurate for the land/overbank areas and not within the stream channel itself.

Note: Map layers represent the inundation of the lowest elevation of intersecting road surfaces. Elevated roadways may remain free of inundation.

If you have questions related to the flood risk management/levee projects within NYS contact the NYSDEC Bureau of Flood Protection and Dam Safety at (518) 402-8185.

The National Levee Database can be accessed here.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
25.8 Water reaches the underside of the bridge on Route 427.
24 Major road and railroad damages occur due to backwater and flooding. In the past there has been 2 feet of water in the business section of Wellsburg.
23 Major flooding begins.
20 Moderate flooding begins. The bridges at Wellsburg and Wilawanna are closed.
16 Flood stage where minor flooding begins. Water reaches Route 427 upstream of the Chemung river gage.
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.

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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: 7-Nov-2019 3:38 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.