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Hydrograph River at a Glance Download
Snake River at Brownlee Dam Forebay Elevation (ft)Observed: 2023.38 ft at 12:00AM Mar 15, 2023Observed: 2025.64 ft at 12:00AM Mar 16, 2023Observed: 2027.26 ft at 12:00AM Mar 17, 2023Observed: 2028 ft at 12:00AM Mar 18, 2023Observed: 2029.07 ft at 12:00AM Mar 19, 2023Observed: 2029.66 ft at 12:00AM Mar 20, 2023Highest Observation: 2030.26 ft at 12:00AM Mar 21, 2023Forecast: 2029.5 ft 6:00AM Mar 21, 2023Forecast: 2029.55 ft 12:00PM Mar 21, 2023Forecast: 2029.63 ft 6:00PM Mar 21, 2023Forecast: 2029.74 ft 12:00AM Mar 22, 2023Forecast: 2029.86 ft 6:00AM Mar 22, 2023Forecast: 2029.98 ft 12:00PM Mar 22, 2023Forecast: 2030.09 ft 6:00PM Mar 22, 2023Forecast: 2030.2 ft 12:00AM Mar 23, 2023Forecast: 2030.31 ft 6:00AM Mar 23, 2023Forecast: 2030.41 ft 12:00PM Mar 23, 2023Forecast: 2030.5 ft 6:00PM Mar 23, 2023Forecast: 2030.59 ft 12:00AM Mar 24, 2023Forecast: 2030.67 ft 6:00AM Mar 24, 2023Forecast: 2030.73 ft 12:00PM Mar 24, 2023Forecast: 2030.8 ft 6:00PM Mar 24, 2023Forecast: 2030.85 ft 12:00AM Mar 25, 2023Forecast: 2030.9 ft 6:00AM Mar 25, 2023Forecast: 2030.95 ft 12:00PM Mar 25, 2023Forecast: 2030.98 ft 6:00PM Mar 25, 2023Highest Forecast: 2031 ft 12:00AM Mar 26, 2023BRNI1(plotting HFIRZ) Graph Created (5:45AM Mar 21, 2023)ObservedForecast (issued 4:37PM Mar 20)Latest observed value: 2030.26 ft at 12:00 AM MDT 21-Mar-2023.
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Tabular Data (UTC)
Tabular Data (MDT)
XML Data
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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.

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Flood Categories (in feet)
Not Available

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.
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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.
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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  
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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.
NWS Information
National Weather Service
Boise Weather Forecast Office
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Boise, ID 83705-5354
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Page last modified: 2-Nov-2020 7:28 PM
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