A winter weather advisory was issued by the National Weather Service on Friday at 2:37 p.m. valid from 10 p.m. until Saturday noon for West Hills and Chehalem Mountains, Outer Southeast Portland Metro and West Columbia River Gorge I-84 Corridor.

The combination of cool temperatures and showery weather has meant Willamette Valley snow is possible at lower elevations throughout this week.

The National Weather Service issued a winter weather advisory at 2:37 p.m. on Friday valid from 10 p.m. until Saturday noon for West Columbia River Gorge of Oregon above 500 ft, Clackamas County Cascade Foothills,

Some small school districts have canceled classes Wednesday. Many districts have announced two- or three-hour delays.