Snohomish River at Snohomish, WA

The last 7 days and the forecast

NWS forecast issued Mon, Oct 12, 8:24 AM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

What floods at each level

From the National Weather Service, highest first.

• 33 ftthe 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 ftthe 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 ftthe 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 ftthe 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 ftthe 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 ftthe 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 ftthe 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 ftthe 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.

Highest crests on record

1. 34.15 ft — December 11, 2025
2. 33.5 ft — November 25, 1990
3. 33.49 ft — November 8, 2006
4. 33.47 ft — January 8, 2009
5. 33.16 ft — December 4, 1975

Recent crests: 27.77 ft (December 18, 2025) · 34.15 ft (December 11, 2025) · 27.53 ft (December 9, 2025) · 27.53 ft (December 9, 2025) · 27.69 ft (December 6, 2023)

Up and down the river, and nearby

• UpstreamSnohomish River near Monroe, WA
• Pilchuck River near Snohomish, WA
• Sultan River near Sultan, WA
• South Fork Stillaguamish River near Granite Falls, WA
• Snoqualmie River near Carnation - Discharge, WA
• Tolt River near Carnation, WA
• Skykomish River near Gold Bar, WA
• South Fork Sultan River near Sultan, WA