The National Weather Service issued an updated winter weather advisory at 4:16 p.m. on Tuesday valid from 6 p.m. until Wednesday noon for Clatsop County Coast, Tillamook County Coast, Central Coast of Oregon,

On Wednesday at 1:25 a.m. a winter weather advisory was issued by the NWS Medford OR in effect until noon for Western Siskiyou County.

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

A map, available on the National Weather Service in Portland website, breaks down these advisories across the region. The Lowlands/Coast and Cascades region remains under a winter weather advisory, while the Oregon Coast Range is under a winter storm warning.