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Hydrograph River at a Glance Download
Green River (WA) at Howard Hanson Reservoir Inflow Discharge (kcfs)Observed: 0.13 kcfs at 9:00PM Sep 13, 2021Observed: 0.15 kcfs at 10:00PM Sep 13, 2021Observed: 0.13 kcfs at 11:00PM Sep 13, 2021Observed: 0.12 kcfs at 11:59PM Sep 13, 2021Observed: 0.12 kcfs at 1:00AM Sep 14, 2021Observed: 0.14 kcfs at 2:00AM Sep 14, 2021Observed: 0.12 kcfs at 3:00AM Sep 14, 2021Observed: 0.14 kcfs at 4:00AM Sep 14, 2021Observed: 0.11 kcfs at 5:00AM Sep 14, 2021Observed: 0.11 kcfs at 6:00AM Sep 14, 2021Observed: 0.13 kcfs at 7:00AM Sep 14, 2021Observed: 0.12 kcfs at 8:00AM Sep 14, 2021Observed: 0.12 kcfs at 9:00AM Sep 14, 2021Observed: 0.12 kcfs at 10:00AM Sep 14, 2021Observed: 0.12 kcfs at 11:00AM Sep 14, 2021Observed: 0.13 kcfs at 12:00PM Sep 14, 2021Observed: 0.15 kcfs at 1:00PM Sep 14, 2021Observed: 0.12 kcfs at 2:00PM Sep 14, 2021Observed: 0.13 kcfs at 3:00PM Sep 14, 2021Observed: 0.13 kcfs at 4:00PM Sep 14, 2021Observed: 0.13 kcfs at 5:00PM Sep 14, 2021Observed: 0.13 kcfs at 6:00PM Sep 14, 2021Observed: 0.13 kcfs at 7:00PM Sep 14, 2021Observed: 0.13 kcfs at 8:00PM Sep 14, 2021Observed: 0.15 kcfs at 9:00PM Sep 14, 2021Observed: 0.15 kcfs at 10:00PM Sep 14, 2021Observed: 0.13 kcfs at 11:00PM Sep 14, 2021Observed: 0.13 kcfs at 11:59PM Sep 14, 2021Observed: 0.13 kcfs at 1:00AM Sep 15, 2021Observed: 0.15 kcfs at 2:00AM Sep 15, 2021Observed: 0.13 kcfs at 3:00AM Sep 15, 2021Observed: 0.13 kcfs at 4:00AM Sep 15, 2021Observed: 0.12 kcfs at 5:00AM Sep 15, 2021Observed: 0.13 kcfs at 6:00AM Sep 15, 2021Observed: 0.15 kcfs at 7:00AM Sep 15, 2021Observed: 0.13 kcfs at 8:00AM Sep 15, 2021Observed: 0.13 kcfs at 9:00AM Sep 15, 2021Observed: 0.13 kcfs at 10:00AM Sep 15, 2021Observed: 0.13 kcfs at 11:00AM Sep 15, 2021Observed: 0.14 kcfs at 12:00PM Sep 15, 2021Observed: 0.14 kcfs at 1:00PM Sep 15, 2021Observed: 0.12 kcfs at 2:00PM Sep 15, 2021Observed: 0.14 kcfs at 3:00PM Sep 15, 2021Observed: 0.12 kcfs at 4:00PM Sep 15, 2021Observed: 0.14 kcfs at 5:00PM Sep 15, 2021Observed: 0.14 kcfs at 6:00PM Sep 15, 2021Observed: 0.14 kcfs at 7:00PM Sep 15, 2021Observed: 0.13 kcfs at 8:00PM Sep 15, 2021Observed: 0.14 kcfs at 9:00PM Sep 15, 2021Observed: 0.13 kcfs at 10:00PM Sep 15, 2021Observed: 0.14 kcfs at 11:00PM Sep 15, 2021Observed: 0.13 kcfs at 11:59PM Sep 15, 2021Observed: 0.13 kcfs at 1:00AM Sep 16, 2021Observed: 0.13 kcfs at 2:00AM Sep 16, 2021Observed: 0.14 kcfs at 3:00AM Sep 16, 2021Observed: 0.13 kcfs at 4:00AM Sep 16, 2021Observed: 0.13 kcfs at 5:00AM Sep 16, 2021Observed: 0.11 kcfs at 6:00AM Sep 16, 2021Observed: 0.13 kcfs at 7:00AM Sep 16, 2021Observed: 0.13 kcfs at 8:00AM Sep 16, 2021Observed: 0.13 kcfs at 9:00AM Sep 16, 2021Observed: 0.11 kcfs at 10:00AM Sep 16, 2021Observed: 0.13 kcfs at 11:00AM Sep 16, 2021Observed: 0.13 kcfs at 12:00PM Sep 16, 2021Observed: 0.14 kcfs at 1:00PM Sep 16, 2021Observed: 0.14 kcfs at 2:00PM Sep 16, 2021Observed: 0.08 kcfs at 3:00PM Sep 16, 2021Highest Observation: 0.18 kcfs at 4:00PM Sep 16, 2021Highest Observation: 0.18 kcfs at 5:00PM Sep 16, 2021Forecast: 0.11 kcfs 11:00PM Sep 16, 2021Forecast: 0.11 kcfs 5:00AM Sep 17, 2021Forecast: 0.11 kcfs 11:00AM Sep 17, 2021Forecast: 0.12 kcfs 5:00PM Sep 17, 2021Forecast: 0.14 kcfs 11:00PM Sep 17, 2021Forecast: 0.19 kcfs 5:00AM Sep 18, 2021Forecast: 0.2 kcfs 11:00AM Sep 18, 2021Forecast: 0.23 kcfs 5:00PM Sep 18, 2021Forecast: 0.24 kcfs 11:00PM Sep 18, 2021Forecast: 0.27 kcfs 5:00AM Sep 19, 2021Forecast: 0.42 kcfs 11:00AM Sep 19, 2021Forecast: 0.55 kcfs 5:00PM Sep 19, 2021Highest Forecast: 0.55 kcfs 11:00PM Sep 19, 2021Forecast: 0.48 kcfs 5:00AM Sep 20, 2021Forecast: 0.41 kcfs 11:00AM Sep 20, 2021Forecast: 0.34 kcfs 5:00PM Sep 20, 2021Forecast: 0.3 kcfs 11:00PM Sep 20, 2021Forecast: 0.27 kcfs 5:00AM Sep 21, 2021Forecast: 0.24 kcfs 11:00AM Sep 21, 2021Forecast: 0.22 kcfs 5:00PM Sep 21, 2021USACEHHDW1(plotting QIIRZ) Graph Created (8:19PM Sep 16, 2021)ObservedForecast (issued 2:23PM Sep 16)Latest observed value: 0.18 kcfs at 5:00 PM PDT 16-Sep-2021.
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Tabular Data (UTC)
Tabular Data (PDT)
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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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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: 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.
NWS Information
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Seattle, WA 98115-6349
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