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Web Portal Changes: In Spring 2024, the Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS) at a repurposed https://water.noaa.gov. A preview of NWPS is available here, where you can see your station hydrograph by replacing SSSSS with the station 5-character id: https://preview.water.noaa.gov/gauges/SSSSS.

Flood Inundation Mapping: Experimental real-time flood Inundation mapping services for 10% of the United States are now available via the NWS Map Viewer. Additional products and geospatial services depicting River Forecast Center and National Water Model forecasts continue to be accessible as described in the StoryMap here.

Please visit https://www.weather.gov/owp/operations for more information.



Hydrograph River at a Glance Download
Grass River at Massena Total Discharge (kcfs)Highest Forecast: 2.5 kcfs 8:00AM Mar 19, 2024Highest Forecast: 2.5 kcfs 2:00PM Mar 19, 2024Forecast: 2.4 kcfs 8:00PM Mar 19, 2024Forecast: 2.4 kcfs 2:00AM Mar 20, 2024Forecast: 2.3 kcfs 8:00AM Mar 20, 2024Forecast: 2.2 kcfs 2:00PM Mar 20, 2024Forecast: 2.2 kcfs 8:00PM Mar 20, 2024Forecast: 2.1 kcfs 2:00AM Mar 21, 2024Forecast: 2.1 kcfs 8:00AM Mar 21, 2024MSSN6(plotting QTIRZ) Graph Created (2:31AM Mar 19, 2024)Forecast (issued 11:42AM Mar 18)
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.

NOTE: Forecasts for the Grass River at Massena are issued routinely year-round.

Return to Area Map
Upstream Gauge - at Chase Mills Upstream Gauge
Flood Categories (in feet)
Not Available

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
Zoom Level:14
KML Image
Gauge LocationGauge Map Marker
Disclaimer
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.
About This Location Collapse

Latitude: 44.933889° N, Longitude: 74.893333° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 288.85 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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.

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Hydrologic Resources Additional Resources
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
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Page last modified: 2-Nov-2020 7:30 PM
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