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.
Windchill explained 
Cold front arrives over Portland by Saturday night 
PDX temps mid to upper 30’s as rain turns to snow 
Snow mixes with rain after 7pm Saturday 
Rain and snow gone by 10pm Saturday 
Daytime highs will be below normal over the weekend 
Windchill represents how cold your skinn will feel when adding wind 
Windchill represents how cold your skinn will feel when adding wind 
Potential snow totals are less than 1″ across the metro. Some will see no snow at all 
Better chance for measurable snow through the gorge and 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.
