EUGENE, Ore. - More than a half foot of snow will fall above 2,000 feet in Lane County through Tuesday afternoon, the National Weather Service said.
The northern Oregon Cascades could see as much as another 15 inches by Wednesday morning.
The upper foothills of the Cascades in Lane County got several inches of snow Monday morning, and forecasters issued a winter weather advisory in effect thorugh 6 p.m. Tuesday.
"A winter weather advisory for snow means that periods of snow will cause primarily travel difficulties," the weather service said. "Be prepared for snow covered roads and limited visibilities and use caution while driving."
The heaviest snow and strongest winds are expected from Santiam Pass north, forecasters said.
But travelers should heed the warning regardless of where they plan to cross the mountains.
"Travel in the Lane County Cascades will be difficult at times through Tuesday," forecasters said Monday. "Motorists traversing Willamette Pass tonight and early Tuesday should be prepared for heavy snow and blowing snow."