Skip Navigation Link  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap


Visit for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

Hydrograph River at a Glance Download
Snake River at Brownlee Dam Forebay Elevation (ft)Highest Observation: 2058.99 ft at 12:00AM Aug 04, 2022Observed: 2058.19 ft at 12:00AM Aug 05, 2022Observed: 2057.7 ft at 12:00AM Aug 06, 2022Observed: 2057.44 ft at 12:00AM Aug 07, 2022Observed: 2057.07 ft at 12:00AM Aug 08, 2022Observed: 2056.58 ft at 12:00AM Aug 09, 2022Observed: 2056.26 ft at 12:00AM Aug 10, 2022Highest Forecast: 2056.25 ft 6:00PM Aug 10, 2022Forecast: 2056.2 ft 12:00AM Aug 11, 2022Forecast: 2056.14 ft 6:00AM Aug 11, 2022Forecast: 2056.08 ft 12:00PM Aug 11, 2022Forecast: 2056.03 ft 6:00PM Aug 11, 2022Forecast: 2055.97 ft 12:00AM Aug 12, 2022Forecast: 2055.9 ft 6:00AM Aug 12, 2022Forecast: 2055.81 ft 12:00PM Aug 12, 2022Forecast: 2055.72 ft 6:00PM Aug 12, 2022Forecast: 2055.62 ft 12:00AM Aug 13, 2022Forecast: 2055.51 ft 6:00AM Aug 13, 2022Forecast: 2055.41 ft 12:00PM Aug 13, 2022Forecast: 2055.3 ft 6:00PM Aug 13, 2022Forecast: 2055.19 ft 12:00AM Aug 14, 2022Forecast: 2055.08 ft 6:00AM Aug 14, 2022Forecast: 2054.97 ft 12:00PM Aug 14, 2022Forecast: 2054.86 ft 6:00PM Aug 14, 2022Forecast: 2054.75 ft 12:00AM Aug 15, 2022Forecast: 2054.63 ft 6:00AM Aug 15, 2022Forecast: 2054.51 ft 12:00PM Aug 15, 2022BRNI1(plotting HFIRZ) Graph Created (4:45PM Aug 10, 2022)ObservedForecast (issued 3:44PM Aug 10)Latest observed value: 2056.26 ft at 12:00 AM MDT 10-Aug-2022.
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Snake River at Brownlee Dam are issued routinely year-round.

Return to Area Map
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
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: 44.836330° N, Longitude: 116.898586° 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)
(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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
Resources Collapse
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
National Weather Service
Boise Weather Forecast Office
NIFC Building 3807
Boise, ID 83705-5354
(208) 334-9860
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:28 PM
Privacy Policy
About Us
Career Opportunities