South Fork Stillaguamish River near Granite Falls
Washington — Water Level & Flood Stage
Located in Snohomish County, Washington on the South Fork Stillaguamish River. Live water level data from USGS gauge 12161000, 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
Action Stage
12.9 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
18 ft
the South Fork Stillaguamish River will cause flooding of Jordan Road...the Robe Valley area upstream from Granite Falls...and Granite Falls downstream to the Blue Spruce area. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the South Fork Stillaguamish River Basin. A stage of 18 feet corresponds to Phase 4 in the Snohomish County Flood Warning System.
16 ft
the South Fork Stillaguamish River will cause flooding in Granite Falls downstream to the Blue Spruce area and Jordan Road. A stage of 16 feet corresponds to Phase 3 in the Snohomish County Flood Warning System.
14 ft
the South Fork Stillaguamish River will cause flooding along the river and tributaries. A stage of 14 feet corresponds to Phase 2 in the Snohomish County Flood Warning 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 |
|---|---|---|
| Nov 6, 2006 | 22.82 ft | 45,600 cfs |
| Nov 6, 2006 | 22.82 ft | 45,600 cfs |
| Oct 20, 2003 | 21.17 ft | 38,328 cfs |
| Oct 20, 2003 | 21.17 ft | 38,328 cfs |
| Nov 17, 2015 | 20.35 ft | 35,200 cfs |
About This Gauge
USGS Site
NWS LID
GFLW1
River
South Fork Stillaguamish River
County
Snohomish, WA
Coordinates
48.1039°N, 121.9444°W
Get Flood Alerts for South Fork 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 South Fork Stillaguamish River near Granite Falls?
The South Fork Stillaguamish River near Granite Falls gauge is maintained by USGS (site 12161000) 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 South Fork Stillaguamish River near Granite Falls?
This gauge has NWS-defined flood categories. Check the flood stages section above for current thresholds.
How do I get alerts when South Fork Stillaguamish River rises?
Download StormCast free on Google Play, go to River Gauges, and add South Fork Stillaguamish River near Granite Falls 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 South Fork Stillaguamish River near Granite Falls gauge located?
The gauge is located in Snohomish County, Washington at coordinates 48.1039°N, 121.9444°W. USGS site number: 12161000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: U. S. Geological Survey, Observations courtesy of U.S. Geological Survey
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