PORTLAND, Ore. (KOIN) — Light rain expected on and off Saturday but overall cloudy skies dominate the daylight hours. Kiss those mild temperatures goodbye — modified Arctic air is heading our way Saturday night.

The West Hills could collect a fraction of an inch of snow while downtown Portland sees a dusting. Snow will not be distributed equally and some of you will get nothing more than a snow show with zero accumulation. Timing for the rain to snow transition could start anytime around 7pm or later. That cold front is a quick mover so the snowfall fun ends by 9 or 10pm Saturday.

Expect bigger driving impacts for travelers along I-84 in the Gorge (2-3″) and mountain passes (4-6″) Saturday. 

A winter weather advisory is in effect Saturday from noon to 8pm for the Upper Hood River Valley and central Columbia River Gorge with 1 – 3″ of snow.

Mountain windchill temps will drop to 0° to 15 below zero Sunday morning. A wind chill advisory is in effect from 8pm Saturday to 11am Monday for the Northern Oregon Cascades and South Washington Cascades.

Sunday you’re waking up to a cold blast of east wind in your face, albeit with sunshine. Windchill temperatures may drop as low as the teens and low 20’s. Expect a repeat Monday morning, clear and extremely cold.