Pendleton, Oregon – A prolonged and potentially dangerous winter storm is setting up across the mountains of Oregon and Washington, raising serious concerns for travel from late Monday night through Thursday afternoon. Heavy snowfall, strong winds, and sharply reduced visibility are expected to impact major mountain passes and high-elevation communities across the region.
According to the National Weather Service, a Winter Storm Watch remains in effect for the Northern Blue Mountains, the east slopes of the Oregon Cascades, and both the upper and lower slopes of the eastern Washington Cascades. Forecast models indicate 20 to 30 inches of snow could accumulate over the course of the multi-day event, with the highest totals likely along the Washington Cascades crest and Oregon Cascade passes.
Winter Storm Overview
This storm system is expected to unfold gradually but intensify as colder air deepens over the region. Snow will begin increasing late Monday night, becoming heavier and more persistent through Tuesday and Wednesday. Because the system lingers, snowfall totals will accumulate over several days rather than falling all at once, increasing the risk of road closures and prolonged travel disruptions.
Forecasters emphasize that while valley locations may see limited impacts, conditions in the mountains could deteriorate rapidly, especially during overnight hours when temperatures drop and road treatment becomes less effective.
Areas Most at Risk
Several mountain communities and travel corridors are expected to see the brunt of the storm. Locations likely to experience extremely hazardous conditions include:
- Sisters, La Pine, Camp Sherman, and Sunriver in central Oregon
- Tollgate and Meacham, including sections of Interstate 84
- Ski Bluewood Resort and surrounding Blue Mountain routes
- Cle Elum, Easton, and Cliffdell along the eastern Washington Cascades
In these areas, bridges and overpasses may become icy quickly, and heavy snowfall could reduce visibility to near zero at times, particularly during the nighttime and early morning hours.
Most Dangerous Travel Period
Officials say the most dangerous travel window is expected from Tuesday evening through Wednesday night, when snowfall rates may intensify and winds increase. During this period, whiteout conditions are possible at higher elevations, making travel not only difficult but potentially life-threatening.
Transportation agencies strongly advise motorists to delay all non-essential travel through mountain passes during this time. Even experienced winter drivers could face rapidly changing conditions, stalled vehicles, and long delays if accidents or closures occur.
Safety and Travel Guidance
For those who must travel despite the warnings, officials urge taking extra precautions:
- Carry tire chains and know how to install them
- Pack winter survival supplies, including food, water, blankets, and a flashlight
- Ensure vehicles have a full tank of fuel
- Allow extra time and prepare for extended delays or temporary closures
Emergency responders stress that rescue operations can be significantly delayed during heavy snow, especially in remote mountain areas.
What Happens Next
The storm is expected to gradually weaken by Thursday afternoon, but lingering snow showers and poor road conditions may continue even after the main system exits. Accumulated snowpack and icy surfaces could remain hazardous well beyond the end of the storm.
Meteorologists caution that the current Winter Storm Watch may be upgraded to Winter Storm Warnings as confidence increases in snowfall amounts and timing. Additional advisories are also likely as the event unfolds and impacts become clearer.
Conclusion
This multi-day winter storm has the potential to bring significant snowfall and dangerous travel conditions to the Cascades and Blue Mountains of Oregon and Washington. With totals possibly reaching 30 inches, residents and travelers are urged to stay informed, adjust plans early, and take official warnings seriously.
Share your experiences in the comments below if you live in or plan to travel through the affected mountain areas.
