Cascade Snowstorm to Shut Down Pass Travel Until Thursday Morning

Up to 9 inches of snow expected in the Cascades, causing hazardous driving conditions.

Published on Mar. 4, 2026

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A Winter Weather Advisory has been issued for the Cascades of Snohomish, King, Pierce and Lewis counties in Washington, with up to 9 inches of snow expected above 3,500 feet through Thursday morning. The heaviest snowfall will target major mountain passes like Stevens Pass, Snoqualmie Pass, and White Pass, leading to traction tire requirements, temporary closures, and potentially isolated power outages.

Why it matters

This snowstorm will significantly impact travel through the Cascade mountain range, a vital transportation corridor for Western Washington. The heavy snow and poor visibility pose risks to drivers and could lead to extended closures of key highways, disrupting commutes and commerce.

The details

According to the National Weather Service, the Winter Weather Advisory is in effect from 4 a.m. Wednesday until 10 a.m. Thursday. Snow totals of 7 to 9 inches are likely between 3,500 and 4,500 feet, with higher elevations seeing even heavier amounts. The heaviest snow is expected to fall Wednesday afternoon through late Wednesday night, with the potential for reduced visibility and downed tree limbs.

  • The Winter Weather Advisory is in effect from 4 a.m. Wednesday until 10 a.m. Thursday.
  • The heaviest snowfall is expected Wednesday afternoon through late Wednesday night.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing weather advisories and warnings.

Washington State Department of Transportation (WSDOT)

The state agency responsible for maintaining and operating the transportation infrastructure in Washington, including major highways and mountain passes.

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What’s next

WSDOT crews are expected to treat and plow major corridors, but additional weather advisories could follow if colder air lingers into the weekend.

The takeaway

This snowstorm is a reminder of the importance of preparedness and caution when driving in the Cascades during the winter months. Motorists should closely monitor weather conditions and heed the advice of local authorities to ensure safe passage through the mountain passes.