Stillaguamish River at Arlington
Washington — Water Level & Flood Stage
Located in Snohomish County, Washington on the Stillaguamish River. Live water level data from USGS gauge 12167400, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
19 ft
Moderate Flood
17.5 ft
Minor Flood
14 ft
Action Stage
12.5 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
21 ft
the Stillaguamish River will cause severe record flooding. Deep and swift flood waters will inundate many roads including Highway 530...Marine Drive and Norman Rd and residential areas in Silvana...Norman... Florence...and Stanwood. Levees are subject to overtopping and damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the river basin. This stage on the Stillaguamish corresponds to a Phase 4 in the Snohomish County flood program.
20 ft
the Stillaguamish River will cause near record major flooding. Deep and swift flood waters will inundate many roads including Highway 530 east of Arlington and at Island Crossing and most valley roads downstream of I-5 to Stanwood. Levees are subject to overtopping and damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Stillaguamish River Basin. This stage corresponds to Phase 4 in Snohomish County flood program.
19 ft
the Stillaguamish River will cause major flooding. Deep and swift waters will flood many roads including Pioneer Highway...Hwy 530...Marine Drive and Norman Rd. Swift waters will flood residential areas near Silvana...Norman...Florence and Stanwood. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Stillaguamish River Basin. A stage of 19 feet on the Stillaguamish River corresponds to Phase 4 in the Snohomish County Flood program.
18 ft
the Stillaguamish River will flood many roads including Hwy 530...Pioneer Highway...Marine Drive and numerous locations along Norman Rd. Swift waters will flood residential areas near Silvana...Norman and Florence. A stage of 18 feet on the Stillaguamish River corresponds roughly to Phase 3 in the Snohomish County Flood program.
17 ft
the Stillaguamish River will cause flooding mainly in the Silvana area, along Norman Road and in Florence. A stage of 17 feet on the Stillaguamish River corresponds roughly to Phase 3 in the Snohomish County Flood program.
16 ft
the Stillaguamish River will cause minor flooding mainly in the Silvana area...including over Pioneer Highway and along Norman Rd. A stage of 16 feet on the Stillaguamish River corresponds roughly to Phase 2 in the Snohomish County Flood program.
14 ft
the Stillaguamish River will locally spill over its banks. Minor flooding around Silvana will occur...including over Pioneer Highway. A stage of 14 feet on the Stillaguamish River corresponds roughly to Phase 2 in the Snohomish County Flood program.
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 5, 2023 | 21.34 ft | 82,700 cfs |
| Dec 5, 2023 | 21.34 ft | 82,700 cfs |
| Dec 12, 2010 | 21.29 ft | 82,400 cfs |
| Dec 12, 2010 | 21.29 ft | 82,400 cfs |
| Nov 6, 2006 | 21.06 ft | 81,060 cfs |
About This Gauge
USGS Site
NWS LID
ARLW1
River
Stillaguamish River
County
Snohomish, WA
Coordinates
48.2036°N, 122.1281°W
Get Flood Alerts for Stillaguamish River
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 Stillaguamish River at Arlington?
The Stillaguamish River at Arlington gauge is maintained by USGS (site 12167400) 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 Stillaguamish River at Arlington?
The NWS-defined flood stage for Stillaguamish River at Arlington is 14 feet. Action stage begins at 12.5 feet. Moderate flooding starts at 17.5 feet, and major flooding at 19 feet.
How do I get alerts when Stillaguamish River rises?
Download StormCast free on Google Play, go to River Gauges, and add Stillaguamish River at Arlington to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Stillaguamish River at Arlington gauge located?
The gauge is located in Snohomish County, Washington at coordinates 48.2036°N, 122.1281°W. USGS site number: 12167400. Data is provided by the U.S. Geological Survey and the National Weather Service.
On This River
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Source & Notes
Data provided by: Observations courtesy of Snohomish County
- 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.