Pendleton, OR – Post-holiday travel across the Washington Cascades could turn hazardous on Friday as mountain snow spreads into the region, affecting several major highways and high-elevation routes.
According to the National Weather Service office in Pendleton, snow associated with a Winter Storm Advisory is expected to develop Friday afternoon and persist through Friday night. The system is forecast to bring winter driving conditions to higher elevations and key transportation corridors during a busy return-travel window.
Snow expected on key Washington highways
Forecasters say snowfall will impact travel along Interstate 90, U.S. Highway 12, and State Route 18, routes commonly used by drivers moving between western and eastern Washington. Snowfall amounts will vary by elevation, but even brief heavier bursts could rapidly worsen conditions, particularly during the evening hours when traffic volumes increase.
Mountain passes and exposed stretches of roadway are most likely to see snow-covered lanes, reduced visibility, and slick surfaces. Transportation officials caution that modest accumulations can still trigger significant slowdowns or temporary closures when combined with post-holiday traffic.
What drivers should expect Friday afternoon and night
Travelers should be prepared for changing conditions as the storm moves through the Cascades. Key impacts include:
- Periods of accumulating snow at higher elevations
- Visibility reductions during heavier snowfall
- Slippery pavement through mountain passes
- Potential delays during peak evening travel
Snow is expected to taper late Friday night, but lingering impacts may continue into early Saturday, especially in shaded areas and higher terrain where temperatures remain cold.
Travel and safety guidance
Transportation officials urge motorists to plan ahead and take winter precautions before heading into the mountains. Recommendations include carrying chains where required, reducing speed, increasing following distance, and allowing extra travel time.
Drivers are encouraged to check real-time road conditions, pass restrictions, and closures through the Washington State Department of Transportation website or mobile app before departing.
Staying informed as conditions evolve
Weather officials note that conditions can change quickly in mountain environments. Travelers and residents should continue monitoring updated forecasts and advisories through Friday night and into the weekend, especially if plans include crossing the Cascades.
Conclusion
With snow moving into the Washington Cascades during a busy travel period, drivers should expect winter conditions on I-90, US-12, and WA-18 from Friday afternoon through the night. Preparation, patience, and staying informed will be key to traveling safely as the system passes through.
If you are traveling through the Cascades this weekend, plan ahead and share your experiences in the comments below.
