Seattle, Washington – Drivers heading into Washington’s northern Cascades have hours to prepare before heavy snow begins stacking up on major mountain routes by 4 a.m. Wednesday, threatening pass closures and hazardous travel through early Friday.
According to the National Weather Service in Seattle, a Winter Weather Advisory remains in effect from 4 a.m. Wednesday until 4 a.m. Friday for the Cascades of Whatcom, Skagit, Snohomish, and northern King counties. Forecasters expect up to 12 inches of snow near Mount Baker and up to 10 inches across the Cascades of Snohomish and northern King counties. Stevens Pass could see 4 to 6 inches at pass level, with higher totals in the backcountry. Winds may gust up to 35 mph, reducing visibility and increasing the risk of falling branches.
Statewide, mountain travel will carry the greatest risk, especially along U.S. Highway 2 at Stevens Pass and State Route 542 near Mount Baker. Snow-covered pavement and brief whiteout conditions could force temporary closures. Crews with the Washington State Department of Transportation may implement traction requirements or chain controls as snowfall intensifies.
Gusty winds combined with heavy snow could also lead to isolated power outages in higher elevations. Residents and travelers should charge devices, carry emergency kits, and delay non-essential mountain travel during peak snowfall.
Snow will taper early Friday morning, but slick roads may linger beyond the advisory. Additional updates are possible if snowfall rates increase overnight Wednesday.
