Portland, Oregon – Travel across the Oregon and south Washington Cascades could become extremely hazardous beginning late Monday night as a prolonged winter storm threatens to bury mountain passes under heavy snow and gusty winds through midweek.
According to the National Weather Service in Portland, a Winter Storm Watch is in effect from late Monday night through late Wednesday night for the North Oregon Cascades, the Cascades of Marion, Linn, and Lane counties, and the south Washington Cascades. Snow totals of one to two feet are possible during the multi-day event, with wind gusts reaching up to 40 mph in exposed terrain.
The highest impacts are expected at Santiam Pass, Willamette Pass, Government Camp, McKenzie Pass, and around Mount Hood and Mount St. Helens. Heavy snowfall combined with strong winds could lead to blowing snow, sharply reduced visibility, and rapidly changing road conditions. Bridges and overpasses are especially vulnerable to becoming slick, increasing the risk of spinouts and closures.
ODOT and WSDOT urge drivers to delay mountain travel if possible. Those who must travel should carry chains, winter survival kits, and plan for extended delays. Conditions may worsen quickly during heavier snow bands, particularly Tuesday night into Wednesday.
The storm is expected to taper late Wednesday night, but lingering snow and icy roads could persist into early Thursday. Forecasters warn the watch may be upgraded to a Winter Storm Warning as confidence in snowfall amounts increases. Travelers should monitor updates closely as this significant winter event approaches.
