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

A cold weather advisory was issued by the National Weather Service on Tuesday at 12:42 p.m. valid from 10 p.m. until Wednesday 10 a.m. for North Oregon Coast Range Lowlands, Central Oregon Coast Range Lowlands,

Clear skies and offshore flow have combined to bring significant overnight cooling to the metro area early Tuesday allowing low temps to dip to about 5-10 degrees below normal. As of 5 a.m., many metro areas showed temperatures at about 25 degrees other than in the city cores.

KGW meteorologist Joe Raineri reported Sunday that Western Oregon will see overnight lows in the 20s, with the Columbia Gorge facing wind chills in the teens.

Forecasters expect snow to accumulate Sunday afternoon into the evening. The Portland area could see anywhere from 4-8 inches, said Hunter Tubbs, a National Weather Service meteorologist based in Gray.

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

As Arctic air blankets the eastern United States, the National Oceanic and Atmospheric Administration has released its latest weather outlook for the last week of January -- but will Portland see those frigid temps or snow?

Two people broke into Portland buildings to escape the cold in separate incidents this week, records show. Police on Sunday responded to an alarm call at Sacramento Elementary School, in Northeast Portland,

Multnomah County officials issued a cold weather advisory Friday as overnight temperatures are expected to be at or below 32 degrees this weekend.

Low morning temps have led to frost formation throughout western Oregon. Be careful of slick spots, especially in shaded areas.

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