Rain and snow is returning to Oregon this weekend, and low elevation snow and ice will become possible next week.

Cold weather advisory: Be Aware. A cold weather advisory is issued when seasonably cold air temperatures or wind chill values, but not extremely cold values, are expected or occurring. Be sure you and your loved ones dress appropriately and cover exposed skin when venturing outdoors.

On Saturday at 1:56 a.m. the National Weather Service issued a cold weather advisory valid from 10 p.m. until Sunday 10 a.m. for North Oregon Coast Range Lowlands, Central Oregon Coast Range Lowlands,

But since then, things have dried out. National Weather Service meteorologist Chris Burling said Friday that overall, the Willamette Valley would continue to see cool and foggy weather for at least the next four to five days,

Forecasters are warning that air pollution may become trapped and adversely affect humans, due to weather conditions in the U.S.

The National Weather Service has simplified some of its winter weather alerts for Wind Chill and Extreme Cold Warnings.

A surface inversion is preventing the normal mixing of air, meaning pollutants will remain trapped at lower altitudes.

The National Weather Service is warning of air stagnation and dense fog in the Willamette Valley.

The record of consecutive days rain-free or a trace in January is 17 days, occurring in 1948. If you take out trace amounts, the successive days drop to 13 in 1985. If no rain falls by Thursday, Portland will break the record. The forecast doesn’t call for rain until at least January 31.

Cold Weather Advisories have been put into place across the Pacific Northwest this week, but many might be unaware of the new cold weather terms.

Portland’s air quality is currently comparable to Los Angeles, despite the ongoing wildfires in Southern California.

Due to the recent extended drying pattern and east winds in the forecast this weekend, the Oregon Department of Forestry is encouraging anyone who may have completed a debris or slash burn in the past few months to monitor and patrol the burn site.