Portland, OR – Travelers heading into the Cascade Mountains of Oregon and southwest Washington should prepare for significant winter travel impacts beginning early Friday, as Winter Weather Advisories go into effect across multiple mountain zones.
According to the National Weather Service in Portland, snow will begin around 4 a.m. Friday and continue into Saturday, bringing 6 to 12 inches of accumulation above 3,000 feet across much of the Oregon Cascades. In the south Washington Cascades, snowfall totals could be even higher, with 14 to 16 inches possible above 2,500 feet. Winds may gust up to 40 mph, creating areas of blowing snow and reduced visibility.
The advisory includes the North Oregon Cascades, the Cascades of Marion and Linn Counties, and the South Washington Cascades, impacting well-traveled areas such as Santiam Pass, McKenzie Pass, Government Camp, Santiam Junction, Larch Mountain, Breitenbush Springs, Mount St. Helens, Timothy Lake, and Lost Lake.
A separate advisory covers the Cascades of Lane County, including Willamette Pass and Waldo Lake, where 6 to 11 inches of snow are expected, mainly above 4,500 feet, from early Friday through early Saturday morning.
Officials warn that roads, bridges, and overpasses will likely become slick and hazardous, especially during overnight hours and periods of heavier snowfall. Conditions may deteriorate quickly near mountain passes, increasing the risk of spin-outs and delays.
Drivers are urged to carry winter emergency kits, including tire chains, and to slow down when traveling through mountain areas. Pedestrians should also use caution, as walking surfaces may become icy.
Travelers can check current road and chain conditions by calling 511 or visiting tripcheck.com in Oregon and wsdot.com in Washington.
