Predicating snowfall in the Willamette Valley is extremely difficult because of the interplay of cool Arctic air interacting with warmer and moisture-filled ocean air. Many of Oregon's mountain ...

Highways in the Coast Range — between the Willamette Valley and the Oregon Coast — are forecast to see snow, and even up to an inch is possible at coastal cities such as Tillamook and Astoria.

Meteorologists are tracking a weather system that could bring low-elevation snow and freezing rain to the Willamette Valley ... All winter weather in Oregon’s largest valley cities can cause ...