Major Flood
7.5 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
6.5 ft
Minor Flood
5.7 ft
Action Stage
3.5 ft
What Floods at Each Level
7.5 ft
the Cedar River will cause severe flooding from Landsburg downstream through Maplewood. Deep and swift flood waters will inundate many roads and some residential areas, especially in Maple Valley. Flooding will occur all along the river including headwaters, tributaries, and other streams within and near the Cedar River Basin. A stage of 7.5 feet on the Cedar River corresponds to a phase 4 flood in the King County flood system.
6.5 ft
the Cedar River will cause major flooding from Landsburg downstream through Maplewood. Deep and swift flood waters will inundate many roads and some residential areas, especially in Maple Valley. Flooding threatens SR-169. Flooding will occur all along the river including headwaters, tributaries, and other streams within and near the Cedar River Basin. A stage of 6.5 feet on the Cedar River corresponds to a phase 4 flood in the King County flood system.
5.7 ft
the Cedar River will cause flooding from Landsburg downstream through Maplewood. Swift waters will flood roads and some residential areas, especially in Maple Valley. Flooding threatens Beyers Road. A stage of 5.7 feet on the Cedar River corresponds roughly to a phase 4 flood in the King County flood system.
5 ft
the Cedar River will flood low areas from Landsburg downstream through Maplewood, mainly in Dorre Don area of Maple Valley and along Jones Rd. A stage of 5.0 feet on the Cedar River corresponds roughly to a phase 3 flood in the King County flood system.
4.4 ft
the Cedar River will locally spill over its banks and over Jones Rd near 156th Ave SE. A stage of 4.4 feet on the Cedar River corresponds roughly to Phase 2 in the King County flood system.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Dec 28, 1917 | 13.55 ft | 7,500 cfs |
| Jan 12, 1928 | 10.95 ft | 4,860 cfs |
| Nov 23, 1990 | 10.38 ft | 10,800 cfs |
About This Gauge
USGS Site
NWS LID
LNDW1
River
Cedar River (WA)
County
King, WA
Coordinates
47.3939°N, 121.9533°W
Get Flood Alerts for Cedar River (WA)
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Cedar River (WA) near Landsburg?
The Cedar River (WA) near Landsburg gauge is maintained by USGS (site 12117500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Cedar River (WA) near Landsburg?
The NWS-defined flood stage for Cedar River (WA) near Landsburg is 5.7 feet. Action stage begins at 3.5 feet. Moderate flooding starts at 6.5 feet, and major flooding at 7.5 feet.
How do I get alerts when Cedar River (WA) rises?
Download StormCast free on Google Play, go to River Gauges, and add Cedar River (WA) near Landsburg to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Cedar River (WA) near Landsburg gauge located?
The gauge is located in King County, Washington at coordinates 47.3939°N, 121.9533°W. USGS site number: 12117500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Cedar River (WA)
On This River
Downstream: Cedar River (WA) at Renton
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- 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.