Seattle, WA – Post-holiday travel across Washington’s Cascade Mountains is expected to become hazardous on Friday as another round of significant snowfall moves into the region, impacting major mountain passes and key interstate routes during a busy travel window.
Forecasts indicate snow will intensify Friday afternoon and continue through the night, creating difficult and potentially dangerous driving conditions across higher elevations and select foothill communities.
Snow Forecast and Timing
According to weather officials, snowfall is expected to ramp up by Friday afternoon as a cold system moves across the Cascades. The heaviest snow is forecast during the late afternoon and evening hours, coinciding with peak travel times for drivers returning home after Christmas.
Higher elevations are projected to receive 8 to 12 inches of snow, with some areas possibly seeing even greater totals where heavier bands persist along the crest. Accumulation is expected to continue overnight before gradually tapering early Saturday.
Lower elevations along the Cascade foothills are not expected to be spared entirely. Some communities could see 1 to 4 inches of snow, which may still be enough to cause slick roads, especially during overnight and early morning hours.
Major Mountain Passes and Highways Affected
Several of Washington’s most critical travel corridors are expected to be impacted by the storm, including:
- Interstate 90, particularly near Snoqualmie Pass
- U.S. Highway 2 at Stevens Pass
- State Route 12 through White Pass
Snoqualmie Pass, one of the busiest routes in the state, is forecast to experience steady snowfall Friday evening. With holiday traffic still elevated, even moderate delays could quickly turn into extended backups if conditions deteriorate.
Officials warn that snow-covered roads, blowing snow, and periods of reduced visibility could make driving difficult to nearly impossible at times, especially during heavier snowfall bursts.
Road Conditions and Travel Impacts
The Washington State Department of Transportation is expected to deploy crews throughout the storm, but snowfall rates may exceed plowing capacity during peak periods. This could result in compact snow and ice building up on roadways faster than crews can clear them.
Drivers should be prepared for possible traction tire requirements, reduced speed limits, and even temporary closures if conditions worsen. Chain requirements may be implemented with little notice, particularly during the evening and overnight hours.
Travel delays are likely, and spin-outs or stalled vehicles could further complicate traffic flow across mountain routes.
Safety Guidance for Drivers
Officials strongly advise motorists to delay non-essential travel across the Cascades on Friday if possible. For those who must travel, preparation is critical.
Recommended precautions include:
- Carrying tire chains and knowing how to install them
- Packing winter emergency supplies such as blankets, food, water, and a flashlight
- Ensuring vehicles are fueled and winter-ready before departure
- Checking current road and pass conditions shortly before traveling
Real-time updates on mountain passes, road restrictions, and closures are available through official state transportation channels.
What to Expect Into the Weekend
Snowfall is expected to gradually ease late Friday night into early Saturday, but lingering impacts may continue into the weekend. Snow-packed roads, icy conditions, and delayed clearing operations could still affect travel early Saturday morning.
Even after snowfall tapers, colder temperatures may prevent rapid melting, especially in shaded areas and higher elevations. Drivers should remain cautious and allow extra travel time.
Conclusion
Friday’s winter storm has the potential to significantly disrupt travel across Washington’s Cascade Mountains, particularly along I-90, Highway 2, and SR-12. With heavy snow expected during peak travel hours, drivers are urged to plan ahead, monitor conditions closely, and avoid unnecessary mountain travel when possible.
Staying informed and prepared can make the difference between a manageable trip and a dangerous situation.
If you’re traveling through the Cascades this weekend, share your road conditions or travel experiences in the comments below.
