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Flooding Services

King County, Washington

Cedar River Flooding Information
USGS gage data, map, and alert phases, and recent high flows

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USGS Gage Name

Time, Date



Flow Change

Cedar River near Landsburg (external link) 7:00 PM, 8/27/2014 1.06 265 0
Cedar River at Renton (external link) 7:15 PM, 8/27/2014 8.30 190 0


This data was requested from USGS at 8/27/2014 8:02:16 PM.

The next request for USGS data is expected in approximately 6 minutes from when this page was loaded.

c.f.s. = 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

Cedar River near Landsburg: Flow 265.00 c.f.s. at 8:02 PM (provisional)Cedar River at Renton: Flow 190.00 c.f.s at 8:02 PM (provisional)
Flood Phase Information
Phase Flow at Cedar River gage near Landsburg Description Condition
1 1,800 c.f.s. Internal Alert  
2 2,800 c.f.s. Minor Flooding Jones Rd near 156th Place SE may overtop and close.
3 4,200 c.f.s. Moderate Flooding Lower Dorre Don Way and Byers Rd SE may overtop and close. These roads provide access to several neighborhoods where residents may become trapped and require evacuation.
4 5,000 c.f.s. Extreme Flooding Additional roads may overtop and close including: Cedar Grove Rd SE, Maxwell Rd SE and SR-169 near the intersection with Cedar Grove Rd SE. Dead end streets may overtop and close including: Jan Rd SE (SE 197th St), SE 203rd St, SE 206th St, and SE 207th St. Fast and deep flows can create dangerous conditions throughout the floodplain.

Cedar River gage map - flooding
Recent High Flow Data
High Flow Event Cedar River near Landsburg Cedar River near Renton
January 17-18, 2011 4,710 c.f.s. 5,870 c.f.s.
January 8, 2009 7,870 c.f.s. 9,390 c.f.s.
November 7, 2006 4,670 c.f.s. 6,090 c.f.s.
February, 1996 5,860 c.f.s. 7,520 c.f.s.
November, 1995 6,580 c.f.s. 7,650 c.f.s.
November, 1990 10,800 c.f.s. 10,600 c.f.s.

The National Weather Service also provides access to provisional gage data:

Cedar River near Landsburg (external link)

Cedar River at Renton (external link)

More Cedar River Flood Documentation

Flood Photo Viewer

Other Flood-related Information

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