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Click on a gage name for graph and additional data.

USGS Gage Name

Time, Date

Stage
(feet)

Flow
(cfs)

Flow Change
(cfs/hr)

Cedar River near Landsburg 1:00 AM, 2/23/2024 1.83 607 0
Cedar River at Renton 12:15 AM, 2/23/2024 8.67 539 +5

* Gage data currently unavailable.

Notes:

This data was requested from USGS at 2/23/2024 1:25:38 AM.

The next request for USGS data is expected in approximately 4 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
Flow at Cedar River near Landsburg gage
cfs = cubic feet per second
Expected Flood Impacts and Actions
1 - No flooding typically occurs 1,800 cfs  
2 - Minor Flooding 2,800 cfs Roads may overtop and close, including SE 184th St and Lower Dorre Don Way SE.
3 - Moderate Flooding 4,200 cfs Roads may overtop and close, including SE 184th St, Byers Rd SE, 216th Ave SE, SE 193rd St, SE 206th St, SE 207th St, Lower Dorre Don Way SE, and Dorre Don Way SE. Several of these roads provide access to neighborhoods where residents may become trapped and require evacuation.
4 - Severe Flooding 5,000 cfs Roads may overtop and close, including SE Jones Rd near 156th Pl SE, SE 184th St, Byers Rd SE, 216th Ave SE, SE 193rd St, SE 206th St, SE 207th St, SE Bain Rd, SE 225th St, Dorre Don Ct SE, Lower Dorre Don Way SE, Dorre Don Way SE, SE 238th St, and 244th Ave SE. Several of these roads provide access to neighborhoods where residents may become trapped and require evacuation. Deep and fast 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
February 7-8, 2020 7,590 cfs 9,620 cfs
January 8, 2009 7,870 cfs 9,390 cfs
November, 1995 6,580 cfs 7,650 cfs
November 24, 1990 10,800 cfs 10,600 cfs

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

Cedar River flood level viewer

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