Portland, Oregon – Travel across Oregon’s Cascade Mountain passes is expected to become increasingly hazardous beginning early Tuesday as a prolonged winter storm delivers heavy snowfall to higher elevations, significantly impacting major mountain routes through midweek.
According to the National Weather Service in Portland, elevations above 2,500 feet will experience persistent snowfall from early Tuesday through Wednesday night. Forecasters say the most intense snow bands are likely Tuesday evening and again Wednesday afternoon into Wednesday night, creating rapidly changing and dangerous driving conditions.
Heavy Snow Expected Across Major Cascade Passes
Several key Cascade passes are forecast to receive significant accumulations during the event window. Government Camp along Highway 26, Santiam Pass on Highway 20, and Willamette Pass on Highway 58 are all expected to see one to two feet of snow at pass level, with locally higher amounts possible on surrounding peaks.
These routes are particularly vulnerable due to steep grades, sharp curves, and limited visibility during snowfall. As snow accumulates, drivers may encounter icy pavement, drifting snow, and sudden whiteout conditions, especially during heavier bursts.
Travel Impacts and Road Conditions
The combination of heavy snow and fluctuating snow levels is expected to cause rapidly deteriorating road conditions. Transportation officials warn that chain requirements, traffic delays, and even temporary closures are possible, especially during peak snowfall periods.
The Oregon Department of Transportation is urging motorists to avoid unnecessary travel over the Cascades during the storm. Drivers who must cross mountain passes are strongly encouraged to check TripCheck for real-time road conditions, cameras, and chain requirements before departure.
Officials emphasize that conditions can change quickly, even within a short distance, making advance planning critical.
Periods of Reduced Visibility and Intense Snowfall
Meteorologists note that snowfall rates may become intense at times, particularly during the evening and overnight hours. These heavier bursts can drastically reduce visibility, making it difficult for drivers to see lane markings, vehicles ahead, or roadside barriers.
Wind gusts at higher elevations may also contribute to blowing and drifting snow, further complicating travel and increasing the risk of slide-offs or stalled vehicles.
Safety Recommendations for Drivers
Emergency officials recommend that anyone attempting mountain travel during this period take winter driving precautions seriously. Key safety measures include:
- Carrying approved traction devices and knowing how to install them
- Packing winter survival gear, including blankets, food, water, and a flashlight
- Ensuring vehicles are fully fueled before entering mountain routes
- Allowing extra travel time and maintaining safe following distances
Drivers are also advised to inform someone of their travel plans and expected arrival time in case conditions worsen unexpectedly.
Timeline and What to Expect Next
The most hazardous travel conditions are expected from Tuesday evening through Wednesday night. While snowfall should begin to taper late Wednesday night, lingering impacts such as compact snow, icy roads, and reduced visibility may continue into Thursday morning, particularly in shaded and higher-elevation areas.
Forecasters say additional advisories or warnings could be issued if snowfall totals increase or conditions deteriorate faster than anticipated. Travelers should continue monitoring official weather updates and road reports throughout the event.
Conclusion
This midweek winter storm is shaping up to be a significant travel hazard for Oregon’s Cascade passes, with heavy snow, poor visibility, and rapidly changing conditions expected through Wednesday. Motorists are urged to plan ahead, delay non-essential travel, and stay informed as conditions evolve.
If you live in or plan to travel through the Cascades during this storm, share your experiences or road conditions in the comments below to help others stay informed.
