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Hydrograph River at a Glance Download
Green River (WA) below Howard Hanson Dam Stage (ft)Flow (kcfs)Forecast: 5.14 ft 11:00PM May 28, 2016Forecast: 5.14 ft 5:00AM May 29, 2016Highest Forecast: 5.26 ft 11:00AM May 29, 2016Forecast: 5.23 ft 5:00PM May 29, 2016Forecast: 5.21 ft 11:00PM May 29, 2016Forecast: 5.16 ft 5:00AM May 30, 2016Forecast: 5.11 ft 11:00AM May 30, 2016Forecast: 5.04 ft 5:00PM May 30, 2016Forecast: 5 ft 11:00PM May 30, 2016Forecast: 4.96 ft 5:00AM May 31, 2016Forecast: 4.93 ft 11:00AM May 31, 2016Forecast: 4.91 ft 5:00PM May 31, 2016Forecast: 4.89 ft 11:00PM May 31, 2016Forecast: 4.89 ft 5:00AM Jun 01, 2016Forecast: 4.88 ft 11:00AM Jun 01, 2016Forecast: 4.88 ft 5:00PM Jun 01, 2016USGS--Water Resources of the United StatesHAHW1(plotting HGIRZ) Graph Created (5:04PM May 28, 2016)Forecast (issued 9:09AM May 28)
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Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts for the Green River (WA) below Howard Hanson Dam are issued routinely year-round.
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Upstream Gauge - at Howard Hanson Reservoir Upstream Gauge Downstream Gauge Downstream Gauge - at Purification Plant
Flood Categories (in feet)
Not Available

Historic Crests
(1) 13.18 ft on 11/08/2006
(2) 12.78 ft on 01/13/2009
(3) 12.75 ft on 02/22/2012 (P)
(4) 12.75 ft on 01/19/2011 (P)
(5) 12.46 ft on 12/16/1999
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(P): Preliminary values subject to further review.

Recent Crests
(1) 9.55 ft on 04/24/2012 (P)
(2) 12.75 ft on 02/22/2012 (P)
(3) 9.69 ft on 01/30/2012 (P)
(4) 11.56 ft on 12/29/2011 (P)
(5) 10.38 ft on 05/16/2011 (P)
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(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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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: 47.283889° N, Longitude: 121.917222° 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  

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
Seattle Weather Forecast Office
7600 Sandpoint Way NE
Seattle, WA 98115-6349
(206) 526-6087
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Page last modified: 13-Aug-2015 2:13 AM
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