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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Snohomish River at Snohomish are issued routinely year-round.
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Upstream Gauge - near Monroe Upstream Gauge
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 29
Moderate Flood Stage: 27
Flood Stage: 25
Action Stage: 0
Low Stage (in feet): -9999

Historic Crests
(1) 33.50 ft on 11/25/1990
(2) 33.49 ft on 11/08/2006 (P)
(3) 33.47 ft on 01/08/2009 (P)
(4) 33.16 ft on 12/04/1975
(5) 33.11 ft on 11/29/1995
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(P): Preliminary values subject to further review.

Recent Crests
(1) 28.46 ft on 02/08/2020 (P)
(2) 29.94 ft on 02/02/2020 (P)
(3) 25.90 ft on 01/08/2020 (P)
(4) 26.75 ft on 12/21/2019 (P)
(5) 25.91 ft on 10/22/2019 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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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 Collapse
If you notice any errors in the below information, please contact our Webmaster
33 the Snohomish River will cause severe near record flooding. Flood waters will likely overtop levees...with major levee damage possible. Flood waters will inundate much of the river valley...including SR2 west of Monroe...SR9 and the Lowell-Snohomish River Rd. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 33 feet on the Snohomish River corresponds to a Phase 4 in the Snohomish County flood program.
32 the Snohomish River will cause major flooding. Overtopping begins at French Slough area. Flood waters will likely overtop other levees...with major levee damage possible. Flood waters will inundate much of the lowlands and many roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 32 feet on the Snohomish River corresponds to a Phase 4 in the Snohomish County flood program.
31 the Snohomish River will cause major flooding. Flood waters will likely overtop levees...with major levee damage possible. Flood waters will inundate much of the valley and many roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 31 feet on the Snohomish River corresponds to a Phase 4 in the Snohomish County flood program.
30 the Snohomish River will flood low farm lands and several roads...including Riverview Rd and the Snohomish-Monroe highway. Hide tidal levels could worsen flooding on the lower delta and Ebey Island. Levees may be damaged. Berms start overtopping at this level. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. This stage on the Snohomish River corresponds to a Phase 4 in the Snohomish County flood program.
29 the Snohomish River will flood low farm lands and several roads...including Riverview Rd and the Snohomish-Monroe highway. Hide tidal levels could worsen flooding on the lower delta and Ebey Island. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 29 feet on the Snohomish River corresponds to a Phase 3 in the Snohomish County flood program.
28 the Snohomish River will flood several roads...including the Snohomish-Monroe highway and Riverview Road...and low areas of the lower Snohomish valley that are not protected by levees. A stage of 28 feet on the Snohomish River corresponds to a Phase 3 in the Snohomish County flood program.
27 the Snohomish River will flood several roads...including the Snohomish-Monroe highway...and low areas of the lower Snohomish valley that are not protected by levees. A stage of 27 feet on the Snohomish River corresponds roughly to a Phase 2 in the Snohomish County flood program.
25 the Snohomish River will cause minor flooding of lowlands not protected by levees and on the Old Snohomish-Monroe highway. A stage of 25 feet on the Snohomish River corresponds to a Phase 2 in the Snohomish County flood program.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Due to tidal effects at this gage, the river forecasts are not representative at river levels below 18 feet. As a consequence, the forecast has been discontinued during the summer period.
Collaborative Agencies Collapse
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
National Weather Service
Seattle Weather Forecast Office
7600 Sandpoint Way NE
Seattle, WA 98115-6349
(206) 526-6087
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Page last modified: 6-Nov-2019 2:38 PM
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