Snohomish River near Monroe, WA
River level and flood forecast · Snohomish County
The river is 14.5 ft below flood stage (15 ft).
Forecast to hold near 0.5 ft through Mon, Oct 19, 5 PM.
Flow: 2,050 cubic feet per second (USGS).
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.
Get flood alerts for this river
An email when the National Weather Service forecasts Snohomish River near Monroe to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 17 ft |
| Moderate flood stage | 16 ft |
| Flood stage | 15 ft |
| Action stage | 10 ft |
| Record crest (November 25, 1990) | 25.3 ft |
What floods at each level
From the National Weather Service, highest first.
- 22 ftthe Snohomish River will cause severe flooding...with deep and swift flood waters inundating farm land...residential areas...and roads. Levees could suffer overtopping and major damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 22 feet at this location corresponds to Phase 4 in the Snohomish County Flood Warning System.
- 21 ftFlooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. The Snohomish River stage at this location corresponds to Phase 4 in the Snohomish County Flood Warning System.
- 20 ftthe Snohomish River will cause severe flooding in the valley. The river will flood many homes...cover much of the farmlands...and close 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 20 feet at this location corresponds to Phase 3 in the Snohomish County Flood Warning System.
- 17 ftthe Snohomish River will cause major flooding...inundating farm land...roads...and some residential areas. Levees will likely suffer damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 17 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
- 16 ftthe Snohomish River will flood several roads and much of the low pasture land in the river valley. A stage of 16 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
- 15 ftthe Snohomish River will cause minor flooding of low pasture lands and several roads near the river. A stage of 15 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
- 14 ftfeet...the Snohomish River will locally spill over its banks into low pasture lands along the river.
Highest crests on record
- 25.3 ft — November 25, 1990
- 24.55 ft — December 12, 2025
- 24.12 ft — January 8, 2009
- 24.1 ft — November 30, 1995
- 23.54 ft — November 7, 2006
Recent crests: 16.18 ft (December 17, 2025) · 24.55 ft (December 12, 2025) · 16.35 ft (December 9, 2025) · 16.38 ft (December 6, 2023) · 15 ft (November 5, 2022)
Up and down the river, and nearby
- UpstreamSkykomish River near Gold Bar, WA
- DownstreamSnohomish River at Snohomish, WA
- Pilchuck River near Snohomish, WA
- Sultan River near Sultan, WA
- Snoqualmie River near Carnation - Discharge, WA
- Tolt River near Carnation, WA
- Issaquah Creek near Issaquah, WA
- South Fork Stillaguamish River near Granite Falls, WA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MROW1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.