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This probabilistic forecast is issued by the Northwest River Forecast Center.

	Hydrograph			River at a Glance			Download			Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

For official forecast click here

Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey

About this graph

Forecasts for the Stillaguamish River at Arlington are issued routinely year-round.

Return to Area Map

Upstream Gauge

Zoom Level:16

Flood Categories (in feet)

Major Flood Stage:	19
Moderate Flood Stage:	17.5
Flood Stage:	14
Action Stage:	12.5
Low Stage (in feet):	0

Historic Crests
(1) 21.16 ft on 12/12/2010
(2) 21.06 ft on 11/06/2006 (P)
(3) 20.82 ft on 01/08/2009 (P)
(4) 20.75 ft on 10/21/2003
(5) 20.50 ft on 11/17/2015 (P)
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.82 ft on 12/25/2022 (P)
(2) 17.04 ft on 11/05/2022 (P)
(3) 16.70 ft on 03/01/2022 (P)
(4) 15.86 ft on 01/12/2022 (P)
(5) 14.62 ft on 11/29/2021 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

	Gauge Location	Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
21	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	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	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	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	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	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	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.

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

NWS Information

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Page last modified: 2-Nov-2020 7:27 PM

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