A powerful winter storm is set to hit Western Washington this week, triggering winter storm warnings across the Cascades. Forecasters warn of heavy mountain snowfall, strong winds, and soaking rain, with the most significant impacts expected from Tuesday night through Wednesday.
The Pacific Northwest is bracing for a major winter storm this week, as forecasters warn of heavy mountain snowfall, strong winds, and widespread rainfall across parts of Western Washington. Weather alerts are already in effect across the Cascade Mountains, and conditions could worsen as a stronger storm system arrives mid-week.
Residents and travelers are being urged to prepare now as this winter storm in the USA could create dangerous travel conditions in mountain passes and bring challenging commutes across the region.
Winter Storm Warning in the Cascades
The National Weather Service has issued a Winter Storm Warning for the Cascade Mountains stretching from northern King County to Whatcom County.
Forecasters say the most severe impacts will be in higher elevations, where significant snow accumulation and gusty winds are expected.
Snowfall Forecast
- Stevens Pass and Highway 2 northward: 12–18 inches of snow or more
- Snoqualmie Pass southward: 6–12 inches of snow
- Wind gusts: Up to 35 mph in mountain areas
These conditions could make travel across mountain passes difficult or hazardous, especially overnight and early morning hours.
Cold Front Brings Rain and Falling Snow Levels
A cold front that moved through the region Sunday brought widespread rain, and colder air is now moving in behind it. As temperatures drop, snow levels are expected to fall to around 3,000 feet, increasing the chance of snowfall in foothill areas.
A convergence zone over King and Snohomish counties may continue into Monday morning, producing heavy showers in lowland areas and increased snowfall in higher elevations such as Stevens Pass.
Monday and Tuesday: Unsettled Weather Continues
The winter storm warning USA today remains in effect as unstable weather continues through the start of the week.
Expected conditions include:
- Overnight temperatures near freezing
- Daytime highs in the 40s
- Rain and snow mix during early morning and overnight hours
Possible Snow Accumulations
- Foothills: A few inches of wet snow possible
- Below 500 feet: Less than 1 inch of light accumulation possible
While minor snowfall may occur in some lowland areas, major disruptions are not currently expected outside higher elevations.
Major Snow Storm This Week: Stronger System Arrives Tuesday Night
Meteorologists warn that the most powerful part of this winter storm watch will arrive Tuesday night into Wednesday.
A new system could bring:
- Heavier rainfall across lowlands
- Wind gusts between 30–40 mph
- Continued heavy snowfall in mountain regions
A Winter Storm Watch may also be issued from late Tuesday night through Friday morning as conditions intensify.
Expected Precipitation Totals Through Friday
This snow storm in US states across the Pacific Northwest could bring substantial precipitation totals.
Lowland Areas
- 1–3 inches of rain
- Heaviest rainfall expected Wednesday
Coastal Areas and Olympic Peninsula
- 2–4 inches of rain
Cascade Mountains
- 2–5 feet of snow possible
Travel Advisory for Mountain Passes
Officials are urging drivers planning to cross the Cascades to prepare for winter driving conditions. Travelers should expect snow-covered roads, reduced visibility, and possible delays or closures in mountain passes.
Checking live updates and the latest winter storm warning maps before traveling is strongly recommended.
Winter Storm Warning USA Live Updates
Weather experts continue monitoring the situation as forecast models evolve. Conditions may change quickly, especially with multiple storm systems expected to impact the region throughout the week.
Residents are advised to stay updated with local weather alerts, prepare for windy and wet conditions, and allow extra time for travel.
Bottom Line: A major snow storm this week could dump feet of snow in the Cascades while bringing heavy rain and gusty winds to Western Washington. The most significant impacts are expected Tuesday night through Wednesday.
