Seattle, WA – A powerful winter storm is expected to bring significant snowfall and dangerous travel conditions to the Washington Cascades beginning Tuesday, prompting the National Weather Service to issue a Winter Storm Warning for multiple mountain regions east and north of Seattle.
Winter Storm Warning Details and Timing
According to the National Weather Service in Seattle, the Winter Storm Warning is in effect from 4 p.m. Tuesday through 10 p.m. PST Wednesday. Forecasters expect 10 to 18 inches of snow at Stevens Pass, with even heavier accumulations possible at higher elevations, particularly in areas north of the pass near Mount Baker.
The warning was officially issued at 1:55 p.m. Monday, upgrading an earlier winter storm watch as confidence increased in both snowfall totals and potential travel impacts.
Areas Covered by the Warning
The alert includes several heavily traveled mountain regions:
- Cascades of Snohomish County
- Northern King County Cascades
- Cascades of Whatcom County
- Cascades of Skagit County
These corridors are frequently used by commuters, commercial freight traffic, and recreational travelers heading toward ski resorts and winter recreation areas, increasing the potential for widespread disruptions.
Expected Snowfall and Wind Impacts
Forecasters warn that snowfall rates could be heavy at times, particularly Tuesday night through Wednesday afternoon. In addition to deep snow accumulation, winds gusting up to 35 mph are expected in mountain passes.
The combination of heavy snow and gusty winds may result in:
- Blowing and drifting snow
- Sharp reductions in visibility
- Rapidly changing road conditions
- Snow-covered and icy highways
Higher elevations may experience even greater snowfall totals, increasing the risk of extended pass closures or chain requirements.
Travel Conditions Likely to Deteriorate
Officials caution that travel through the Cascades could become very difficult or even impossible at times, especially during periods of intense snowfall. Stevens Pass and other mountain routes may see delays, accidents, and temporary closures as road crews work to clear snow and manage safety.
Drivers are strongly encouraged to avoid nonessential travel through mountain passes during the warning period. Those who must travel should be prepared for sudden changes in weather and road conditions.
Power Outage and Safety Concerns
The National Weather Service notes that heavy, wet snow combined with strong winds could place stress on trees and power lines. This raises the possibility of falling tree branches and isolated power outages in mountain communities.
Residents and travelers in higher elevations should be prepared for potential service disruptions and limited access to emergency assistance if conditions worsen.
Preparedness Recommendations for Travelers
Authorities recommend several safety precautions for anyone traveling through affected areas:
- Carry emergency supplies, including food, water, blankets, and a flashlight
- Keep a fully charged phone and extra power sources
- Travel with chains or approved traction devices when required
- Allow extra time and inform others of travel plans
The Washington State Department of Transportation urges drivers to monitor pass conditions closely and check for updates before departing, as conditions may deteriorate quickly once the storm intensifies.
Looking Ahead
Snowfall is expected to taper off late Wednesday evening, but lingering impacts such as icy roads, reduced visibility, and avalanche risk may continue beyond the official warning period. Road conditions could remain hazardous even after snow ends.
Officials stress that winter storms in the Cascades can evolve rapidly, and travelers should remain flexible with plans and prioritize safety over schedules.
Share your experiences in the comments below if you’re impacted by the storm or traveling through the Cascades this week.
