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Hydrograph River at a Glance Download
Spokane River at Long Lake Dam Forebay Elevation (ft)Highest Observation: 1535.57 ft at 11:59PM Feb 19, 2020Observed: 1535.5 ft at 11:59PM Feb 20, 2020Observed: 1535.34 ft at 11:59PM Feb 21, 2020Observed: 1535.16 ft at 11:59PM Feb 22, 2020Observed: 1534.85 ft at 11:59PM Feb 23, 2020Observed: 1534.52 ft at 11:59PM Feb 24, 2020Observed: 1534.11 ft at 11:59PM Feb 25, 2020Forecast: 1534.01 ft 4:00PM Feb 26, 2020Forecast: 1534.04 ft 10:00PM Feb 26, 2020Forecast: 1534.06 ft 4:00AM Feb 27, 2020Forecast: 1534.08 ft 10:00AM Feb 27, 2020Forecast: 1534.11 ft 4:00PM Feb 27, 2020Forecast: 1534.13 ft 10:00PM Feb 27, 2020Forecast: 1534.15 ft 4:00AM Feb 28, 2020Forecast: 1534.18 ft 10:00AM Feb 28, 2020Forecast: 1534.2 ft 4:00PM Feb 28, 2020Forecast: 1534.22 ft 10:00PM Feb 28, 2020Forecast: 1534.25 ft 4:00AM Feb 29, 2020Forecast: 1534.27 ft 10:00AM Feb 29, 2020Forecast: 1534.29 ft 4:00PM Feb 29, 2020Forecast: 1534.32 ft 10:00PM Feb 29, 2020Forecast: 1534.34 ft 4:00AM Mar 01, 2020Forecast: 1534.36 ft 10:00AM Mar 01, 2020Forecast: 1534.39 ft 4:00PM Mar 01, 2020Forecast: 1534.41 ft 10:00PM Mar 01, 2020Forecast: 1534.43 ft 4:00AM Mar 02, 2020Forecast: 1534.45 ft 10:00AM Mar 02, 2020Forecast: 1534.48 ft 4:00PM Mar 02, 2020Forecast: 1534.5 ft 10:00PM Mar 02, 2020Forecast: 1534.51 ft 4:00AM Mar 03, 2020Forecast: 1534.51 ft 10:00AM Mar 03, 2020Forecast: 1534.51 ft 4:00PM Mar 03, 2020Forecast: 1534.52 ft 10:00PM Mar 03, 2020Forecast: 1534.52 ft 4:00AM Mar 04, 2020Highest Forecast: 1534.53 ft 10:00AM Mar 04, 2020LLKW1(plotting HFIRZ) Graph Created (3:31PM Feb 26, 2020)ObservedForecast (issued 7:09AM Feb 26)Latest observed value: 1534.11 ft at 11:59 PM PST 25-Feb-2020.
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Tabular Data (UTC)
Tabular Data (PST)
XML Data
RSS Files
Datum: Not Available
NOTE: Gauge reading affected by power generation.

NOTE: Forecasts for the Spokane River at Long Lake Dam are issued routinely year-round.

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Upstream Locations Upstream Gauge
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
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: 47.836667° N, Longitude: 117.838333° 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
Spokane Weather Forecast Office
2601 N. Rambo Rd.
Spokane, WA 99224
(509) 244-0110
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Page last modified: 4-Mar-2019 11:27 PM
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