Portland, Oregon – Snow levels could drop below 1,000 feet on multiple nights next week, bringing a rain-snow mix near Interstate 5 and Interstate 84 corridors.
According to the National Weather Service in Portland, a cooler air mass arriving from the north will move into northwest Oregon beginning Monday, Feb. 16, and continue through Friday, Feb. 20. Each night carries a 20% to 40% chance that snow levels fall below 1,000 feet.
Forecasters say a rain and snow mix could reach the valley floor at times, including the Portland metro area and communities along I-205 and U.S. 26. However, any snow that develops is expected to melt upon impact due to daytime temperatures rising well above freezing.
If lowland snow does accumulate, officials say it would likely be short-lived. Daytime warming should limit significant impacts, though brief slick spots cannot be ruled out during overnight and early morning hours.
The pattern reflects a series of weather systems moving south from British Columbia, reinforcing cooler nighttime conditions while allowing mild afternoons. Travelers heading through the West Hills, the Columbia River Gorge along I-84, or higher elevations near Mount Hood should monitor for localized changes in precipitation type.
Early morning commuters, delivery drivers, and students may encounter wet roads with isolated slushy conditions before temperatures climb above freezing.
Residents are encouraged to monitor updated forecasts throughout the week as confidence in snow levels may shift with each passing system.
