First Christian Church in Eugene seen through the pale haze of wildfire smoke that again infiltrated the Willamette Valley Friday.

First Christian Church in Eugene seen through the pale haze of wildfire smoke that again infiltrated the Willamette Valley Friday.

Andy Nelson/Register-Guard

Light south winds and smoke moving through the ­Cascade Range’s river valleys into the south ­Willamette Valley brought a blanket of forest fire ­pollution into Eugene-Springfield on ­Friday, with more likely on ­Saturday.

But by late Sunday, westerly winds should clear most smoke from Western Oregon, according to federal, state and local forecasters.

“The west side of the state, the Willamette Valley, Roseburg and the Rogue Valley, will all see some smoke” Saturday, according to oregonsmoke.blogspot.com, a government forecasting website. “The greatest impacts will be in the western foothills of the Cascades and along the river valleys where drainage flows bring smoke down from the (Cascade Range) fires.”

Eugene-Springfield air is very likely to be “unhealthy” Saturday, according to the forecast, a repeat of Friday’s pollution.

Read more at the Register-Guard.