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Hydrograph River at a Glance Download
Snake River (WA) at Lower Granite Forebay Elevation (ft)Observed: 735.89 ft at 8:00AM Mar 15, 2023Observed: 735.72 ft at 9:00AM Mar 15, 2023Observed: 735.75 ft at 10:00AM Mar 15, 2023Observed: 735.93 ft at 11:00AM Mar 15, 2023Observed: 735.98 ft at 12:00PM Mar 15, 2023Observed: 736.13 ft at 1:00PM Mar 15, 2023Observed: 736.33 ft at 2:00PM Mar 15, 2023Observed: 736.35 ft at 3:00PM Mar 15, 2023Observed: 736.42 ft at 4:00PM Mar 15, 2023Observed: 736.44 ft at 5:00PM Mar 15, 2023Observed: 736.31 ft at 6:00PM Mar 15, 2023Observed: 736.22 ft at 7:00PM Mar 15, 2023Observed: 736.1 ft at 8:00PM Mar 15, 2023Observed: 735.95 ft at 9:00PM Mar 15, 2023Observed: 736 ft at 10:00PM Mar 15, 2023Observed: 736.08 ft at 11:00PM Mar 15, 2023Observed: 736.08 ft at 11:59PM Mar 15, 2023Observed: 736.09 ft at 12:00AM Mar 16, 2023Observed: 736.25 ft at 1:00AM Mar 16, 2023Observed: 736.4 ft at 2:00AM Mar 16, 2023Observed: 736.39 ft at 3:00AM Mar 16, 2023Observed: 736.5 ft at 4:00AM Mar 16, 2023Observed: 736.61 ft at 5:00AM Mar 16, 2023Observed: 736.46 ft at 6:00AM Mar 16, 2023Observed: 736.32 ft at 7:00AM Mar 16, 2023Observed: 736.24 ft at 8:00AM Mar 16, 2023Observed: 735.97 ft at 9:00AM Mar 16, 2023Observed: 735.9 ft at 10:00AM Mar 16, 2023Observed: 736.04 ft at 11:00AM Mar 16, 2023Observed: 736.08 ft at 12:00PM Mar 16, 2023Observed: 736.15 ft at 1:00PM Mar 16, 2023Observed: 736.34 ft at 2:00PM Mar 16, 2023Observed: 736.43 ft at 3:00PM Mar 16, 2023Observed: 736.47 ft at 4:00PM Mar 16, 2023Observed: 736.57 ft at 5:00PM Mar 16, 2023Observed: 736.54 ft at 6:00PM Mar 16, 2023Observed: 736.38 ft at 7:00PM Mar 16, 2023Observed: 736.32 ft at 8:00PM Mar 16, 2023Observed: 736.21 ft at 9:00PM Mar 16, 2023Observed: 736.09 ft at 10:00PM Mar 16, 2023Observed: 736.22 ft at 11:00PM Mar 16, 2023Observed: 736.34 ft at 11:59PM Mar 16, 2023Observed: 736.35 ft at 12:00AM Mar 17, 2023Observed: 736.38 ft at 1:00AM Mar 17, 2023Observed: 736.59 ft at 2:00AM Mar 17, 2023Observed: 736.74 ft at 3:00AM Mar 17, 2023Observed: 736.77 ft at 4:00AM Mar 17, 2023Observed: 736.87 ft at 5:00AM Mar 17, 2023Observed: 736.85 ft at 6:00AM Mar 17, 2023Observed: 736.67 ft at 7:00AM Mar 17, 2023Observed: 736.63 ft at 8:00AM Mar 17, 2023Observed: 736.62 ft at 9:00AM Mar 17, 2023Observed: 736.5 ft at 10:00AM Mar 17, 2023Observed: 736.7 ft at 11:00AM Mar 17, 2023Observed: 736.82 ft at 12:00PM Mar 17, 2023Observed: 736.86 ft at 1:00PM Mar 17, 2023Observed: 737.05 ft at 2:00PM Mar 17, 2023Observed: 737.17 ft at 3:00PM Mar 17, 2023Observed: 737.22 ft at 4:00PM Mar 17, 2023Observed: 737.34 ft at 5:00PM Mar 17, 2023Observed: 737.3 ft at 6:00PM Mar 17, 2023Observed: 737.15 ft at 7:00PM Mar 17, 2023Observed: 737.1 ft at 8:00PM Mar 17, 2023Observed: 736.96 ft at 9:00PM Mar 17, 2023Observed: 736.82 ft at 10:00PM Mar 17, 2023Observed: 736.88 ft at 11:00PM Mar 17, 2023Observed: 736.91 ft at 11:59PM Mar 17, 2023Observed: 736.91 ft at 12:00AM Mar 18, 2023Observed: 737.02 ft at 1:00AM Mar 18, 2023Observed: 737.16 ft at 2:00AM Mar 18, 2023Observed: 737.32 ft at 3:00AM Mar 18, 2023Observed: 737.46 ft at 4:00AM Mar 18, 2023Observed: 737.47 ft at 5:00AM Mar 18, 2023Observed: 737.46 ft at 6:00AM Mar 18, 2023Observed: 737.31 ft at 7:00AM Mar 18, 2023Observed: 737.21 ft at 8:00AM Mar 18, 2023Observed: 737.09 ft at 9:00AM Mar 18, 2023Observed: 737.12 ft at 10:00AM Mar 18, 2023Observed: 737.08 ft at 11:00AM Mar 18, 2023Observed: 737.11 ft at 12:00PM Mar 18, 2023Observed: 737.23 ft at 1:00PM Mar 18, 2023Observed: 737.34 ft at 2:00PM Mar 18, 2023Observed: 737.39 ft at 3:00PM Mar 18, 2023Observed: 737.56 ft at 4:00PM Mar 18, 2023Highest Observation: 737.66 ft at 5:00PM Mar 18, 2023Observed: 737.51 ft at 6:00PM Mar 18, 2023Observed: 737.41 ft at 7:00PM Mar 18, 2023Observed: 737.34 ft at 8:00PM Mar 18, 2023Observed: 737.07 ft at 9:00PM Mar 18, 2023Observed: 737.02 ft at 10:00PM Mar 18, 2023Observed: 737.03 ft at 11:00PM Mar 18, 2023Observed: 737.03 ft at 11:59PM Mar 18, 2023Observed: 737.03 ft at 12:00AM Mar 19, 2023Observed: 737.16 ft at 1:00AM Mar 19, 2023Observed: 737.29 ft at 2:00AM Mar 19, 2023Observed: 737.41 ft at 3:00AM Mar 19, 2023Observed: 737.56 ft at 4:00AM Mar 19, 2023Observed: 737.55 ft at 5:00AM Mar 19, 2023Observed: 737.46 ft at 6:00AM Mar 19, 2023Observed: 737.31 ft at 7:00AM Mar 19, 2023Observed: 737.15 ft at 8:00AM Mar 19, 2023Observed: 736.93 ft at 9:00AM Mar 19, 2023Observed: 736.76 ft at 10:00AM Mar 19, 2023Observed: 736.81 ft at 11:00AM Mar 19, 2023Observed: 736.83 ft at 12:00PM Mar 19, 2023Observed: 736.88 ft at 1:00PM Mar 19, 2023Observed: 737.1 ft at 2:00PM Mar 19, 2023Observed: 737.19 ft at 3:00PM Mar 19, 2023Observed: 737.2 ft at 4:00PM Mar 19, 2023Observed: 737.2 ft at 5:00PM Mar 19, 2023Observed: 737.15 ft at 6:00PM Mar 19, 2023Observed: 737.04 ft at 7:00PM Mar 19, 2023Observed: 736.93 ft at 8:00PM Mar 19, 2023Observed: 736.88 ft at 9:00PM Mar 19, 2023Observed: 736.83 ft at 10:00PM Mar 19, 2023Observed: 736.78 ft at 11:00PM Mar 19, 2023Observed: 736.76 ft at 11:59PM Mar 19, 2023Observed: 736.75 ft at 12:00AM Mar 20, 2023Observed: 736.91 ft at 1:00AM Mar 20, 2023Observed: 736.96 ft at 2:00AM Mar 20, 2023Observed: 737.03 ft at 3:00AM Mar 20, 2023Observed: 737.15 ft at 4:00AM Mar 20, 2023Observed: 737.01 ft at 5:00AM Mar 20, 2023Observed: 736.86 ft at 6:00AM Mar 20, 2023Observed: 736.77 ft at 7:00AM Mar 20, 2023Observed: 736.54 ft at 8:00AM Mar 20, 2023Observed: 736.37 ft at 9:00AM Mar 20, 2023Observed: 736.46 ft at 10:00AM Mar 20, 2023Observed: 736.49 ft at 11:00AM Mar 20, 2023Observed: 736.49 ft at 12:00PM Mar 20, 2023Observed: 736.73 ft at 1:00PM Mar 20, 2023Observed: 736.89 ft at 2:00PM Mar 20, 2023Observed: 736.91 ft at 3:00PM Mar 20, 2023Observed: 737.1 ft at 4:00PM Mar 20, 2023Observed: 737.17 ft at 5:00PM Mar 20, 2023Observed: 737.02 ft at 6:00PM Mar 20, 2023Observed: 737.07 ft at 7:00PM Mar 20, 2023Observed: 737.02 ft at 8:00PM Mar 20, 2023Observed: 736.83 ft at 9:00PM Mar 20, 2023Observed: 736.87 ft at 10:00PM Mar 20, 2023Observed: 736.98 ft at 11:00PM Mar 20, 2023Observed: 737.05 ft at 11:59PM Mar 20, 2023Observed: 737.05 ft at 12:00AM Mar 21, 2023Observed: 737.16 ft at 1:00AM Mar 21, 2023Observed: 737.39 ft at 2:00AM Mar 21, 2023Observed: 737.53 ft at 3:00AM Mar 21, 2023Observed: 737.57 ft at 4:00AM Mar 21, 2023Observed: 737.52 ft at 5:00AM Mar 21, 2023Observed: 737.53 ft at 6:00AM Mar 21, 2023Observed: 737.29 ft at 7:00AM Mar 21, 2023Observed: 737.1 ft at 8:00AM Mar 21, 2023Observed: 737.04 ft at 9:00AM Mar 21, 2023Observed: 736.8 ft at 10:00AM Mar 21, 2023Observed: 736.68 ft at 11:00AM Mar 21, 2023Observed: 736.79 ft at 12:00PM Mar 21, 2023Observed: 736.86 ft at 1:00PM Mar 21, 2023Observed: 736.9 ft at 2:00PM Mar 21, 2023Observed: 737.11 ft at 3:00PM Mar 21, 2023Observed: 737.21 ft at 4:00PM Mar 21, 2023Observed: 737.08 ft at 5:00PM Mar 21, 2023Observed: 737.05 ft at 6:00PM Mar 21, 2023Observed: 736.89 ft at 7:00PM Mar 21, 2023Observed: 736.64 ft at 8:00PM Mar 21, 2023Observed: 736.45 ft at 9:00PM Mar 21, 2023Observed: 736.3 ft at 10:00PM Mar 21, 2023Observed: 736.33 ft at 11:00PM Mar 21, 2023Observed: 736.27 ft at 11:59PM Mar 21, 2023Observed: 736.25 ft at 12:00AM Mar 22, 2023Observed: 736.42 ft at 1:00AM Mar 22, 2023Observed: 736.59 ft at 2:00AM Mar 22, 2023Observed: 736.65 ft at 3:00AM Mar 22, 2023Observed: 736.82 ft at 4:00AM Mar 22, 2023Observed: 736.95 ft at 5:00AM Mar 22, 2023Observed: 736.75 ft at 6:00AM Mar 22, 2023Highest Forecast: 736.68 ft 11:00AM Mar 22, 2023Highest Forecast: 736.68 ft 5:00PM Mar 22, 2023Highest Forecast: 736.68 ft 11:00PM Mar 22, 2023Highest Forecast: 736.68 ft 5:00AM Mar 23, 2023Highest Forecast: 736.68 ft 11:00AM Mar 23, 2023Highest Forecast: 736.68 ft 5:00PM Mar 23, 2023Highest Forecast: 736.68 ft 11:00PM Mar 23, 2023Highest Forecast: 736.68 ft 5:00AM Mar 24, 2023Highest Forecast: 736.68 ft 11:00AM Mar 24, 2023Highest Forecast: 736.68 ft 5:00PM Mar 24, 2023Highest Forecast: 736.68 ft 11:00PM Mar 24, 2023Highest Forecast: 736.68 ft 5:00AM Mar 25, 2023Highest Forecast: 736.68 ft 11:00AM Mar 25, 2023Highest Forecast: 736.68 ft 5:00PM Mar 25, 2023Highest Forecast: 736.68 ft 11:00PM Mar 25, 2023Highest Forecast: 736.68 ft 5:00AM Mar 26, 2023Highest Forecast: 736.68 ft 11:00AM Mar 26, 2023Highest Forecast: 736.68 ft 5:00PM Mar 26, 2023Highest Forecast: 736.68 ft 11:00PM Mar 26, 2023Highest Forecast: 736.68 ft 5:00AM Mar 27, 2023Highest Forecast: 736.68 ft 11:00AM Mar 27, 2023Highest Forecast: 736.68 ft 5:00PM Mar 27, 2023Highest Forecast: 736.68 ft 11:00PM Mar 27, 2023Highest Forecast: 736.68 ft 5:00AM Mar 28, 2023Highest Forecast: 736.68 ft 11:00AM Mar 28, 2023Highest Forecast: 736.68 ft 5:00PM Mar 28, 2023Highest Forecast: 736.68 ft 11:00PM Mar 28, 2023Highest Forecast: 736.68 ft 5:00AM Mar 29, 2023US Army Corps of EngineersLGDW1(plotting HFIRX) Graph Created (7:01AM Mar 22, 2023)ObservedForecast (issued 3:26PM Mar 21)Latest observed value: 736.75 ft at 6:00 AM PDT 22-Mar-2023.
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge reading affected by reservoir operations.

NOTE: Forecasts for the Snake River (WA) at Lower Granite are issued routinely year-round.

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Upstream Gauge - near Anatone Upstream Gauge Downstream Gauge Downstream Gauge - at Little Goose Dam
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 0
Low Stage (in feet): 0

Historic Crests
(1) 737.37 ft on 10/23/2022 (P)
(2) 737.29 ft on 01/01/2017
(3) 737.28 ft on 08/02/2021
(4) 737.25 ft on 09/19/2020
(5) 737.23 ft on 09/18/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 737.37 ft on 10/23/2022 (P)
(2) 737.28 ft on 08/02/2021
(3) 737.25 ft on 09/19/2020
(4) 737.23 ft on 09/18/2019
(5) 736.99 ft on 03/01/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 734.66 ft on 05/24/2022
(2) 734.96 ft on 05/19/2021
Zoom Level:9
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: 46.657500° N, Longitude: 117.431100° 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:
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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
Spokane Weather Forecast Office
2601 N. Rambo Rd.
Spokane, WA 99224
(509) 244-0110
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