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Hydrograph River at a Glance Download
Green River (WA) at Howard Hanson Reservoir Inflow Discharge (kcfs)Highest Observation: 1.89 kcfs at 3:00AM Feb 26, 2021Highest Observation: 1.89 kcfs at 4:00AM Feb 26, 2021Highest Observation: 1.89 kcfs at 5:00AM Feb 26, 2021Observed: 1.88 kcfs at 6:00AM Feb 26, 2021Observed: 1.86 kcfs at 7:00AM Feb 26, 2021Observed: 1.85 kcfs at 8:00AM Feb 26, 2021Observed: 1.8 kcfs at 9:00AM Feb 26, 2021Forecast: 1.28 kcfs 4:00AM Mar 01, 2021Forecast: 1.29 kcfs 10:00AM Mar 01, 2021Forecast: 1.31 kcfs 4:00PM Mar 01, 2021Forecast: 1.34 kcfs 10:00PM Mar 01, 2021Forecast: 1.37 kcfs 4:00AM Mar 02, 2021Highest Forecast: 1.38 kcfs 10:00AM Mar 02, 2021Forecast: 1.37 kcfs 4:00PM Mar 02, 2021Forecast: 1.35 kcfs 10:00PM Mar 02, 2021Forecast: 1.32 kcfs 4:00AM Mar 03, 2021Forecast: 1.28 kcfs 10:00AM Mar 03, 2021Forecast: 1.24 kcfs 4:00PM Mar 03, 2021Forecast: 1.22 kcfs 10:00PM Mar 03, 2021Forecast: 1.21 kcfs 4:00AM Mar 04, 2021Forecast: 1.2 kcfs 10:00AM Mar 04, 2021Forecast: 1.2 kcfs 4:00PM Mar 04, 2021Forecast: 1.2 kcfs 10:00PM Mar 04, 2021Forecast: 1.22 kcfs 4:00AM Mar 05, 2021Forecast: 1.24 kcfs 10:00AM Mar 05, 2021Forecast: 1.28 kcfs 4:00PM Mar 05, 2021Forecast: 1.37 kcfs 10:00PM Mar 05, 2021USACEHHDW1(plotting QIIRZ) Graph Created (2:05AM Mar 1, 2021)ObservedForecast (issued 2:15PM Feb 28)Latest observed value: 1.8 kcfs at 9:00 AM PST 26-Feb-2021.
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Tabular Data (UTC)
Tabular Data (PST)
XML Data
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Datum: Not Available
Metadata
NOTE: River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Green River (WA) at Howard Hanson Reservoir are issued routinely year-round.

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Upstream Gauge - above Twin Camp Upstream Gauge Downstream Gauge Downstream Gauge - below Howard Hanson Dam
Flood Categories (in feet)
Not Available

Historic Crests
(1) 0.00 ft on 01/31/2003
(2) 0.00 ft on 01/18/2005
(3) 0.00 ft on 01/10/2006
(4) 0.00 ft on 11/12/2008
(5) 0.00 ft on 11/06/2006
(6) 0.00 ft on 01/07/2009

(P): Preliminary values subject to further review.

Recent Crests
(1) 0.00 ft on 01/07/2009
(2) 0.00 ft on 11/12/2008
(3) 0.00 ft on 11/06/2006
(4) 0.00 ft on 01/10/2006
(5) 0.00 ft on 01/18/2005
(6) 0.00 ft on 01/31/2003

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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 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.
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Latitude: 47.277222° N, Longitude: 121.792222° 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 Not Available Not Available  

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.
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