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Click on a gage name for graph and additional data.

USGS Gage Name

Time, Date



Flow Change

Howard A Hanson Reservoir 11:00 PM, 6/19/2024 1,166.90 n/a 0 (stage, in feet)
Green River below Howard Hanson Dam 11:30 PM, 6/19/2024 5.48 641 +8
Green River near Palmer 11:00 PM, 6/19/2024 4.97 597 0
Big Soos Creek above Hatchery 11:15 PM, 6/19/2024 3.07 67 0
Green River near Auburn 10:45 PM, 6/19/2024 57.80 851 0
Green River at 200th St in Kent 11:15 PM, 6/19/2024 13.10 792 -0.03 (stage, in feet)

* Gage data currently unavailable.


This data was requested from USGS at 6/19/2024 11:45:13 PM.

The next request for USGS data is expected in approximately 7 minutes from when this page was loaded.

cfs = cubic feet per second.
King County provides funding to the United States Geological Survey (USGS) to support the operation and maintenance of river and stream gages and related systems. The term "gage" is defined as an instrument for measuring or testing. USGS uses the term "streamgage" to describe their equipment that obtains estimates of the amount of water flowing in streams and rivers. More information about USGS streamgages

Phase Phase Threshold
Measured or expected flow at Green River near Auburn gage
cfs = cubic feet per second
Expected Flood Impacts
1 - No flooding typically occurs 5,000 cfs  
2 - Minor Flooding 7,000 cfs Lowland flooding in the valley upstream of the City of Auburn.
3 - Moderate Flooding 9,000 cfs Flooding of varied depths occurs in the valley upstream of the City of Auburn and lower Mill Creek basin. Southeast Green Valley Rd and West Valley Rd may overtop.
4 - Severe Flooding 12,000 cfs Critical flood control levees may weaken from saturation. Sudden changes in flood conditions are possible, especially in levee-protected areas. These changes may include rapidly rising water, widespread inundation, road closures, and utility disruptions.
* Phase is determined by current Auburn gage reading or the expected flow based on Howard Hanson dam operations information from the U.S. Army Corps of Engineers.
Green River - Duwamish River gage map - flooding
Recent High Flow Data:
Green River at Auburn
February 7, 2020 11,700 cfs
December 8, 2015 10,900 cfs
November 7, 2006 12,200 cfs
February 8, 1996 12,400 cfs

Additional USGS gages: (external links)

Additional U.S. Army Corps of Engineers gage data: (external link)

U.S. Army Corps of Engineers access for the following gages

  • Howard Hanson Dam
  • Howard Hanson Dam Tailwater
  • Green River near Palmer
  • Green River near Auburn
  • Green River near Lester
  • Big Soos Creek above Hatchery, near Auburn
  • Newaukum Creek near Black Diamond

Northwest River Forecast Center data and forecast information

Howard Hanson Reservoir (external link)

More Green-Duwamish River Flood Related Information

» Return to the The Flood Warning System Page
» Visit King County Flooding Services
» See other Green River Topics