Portland is under an Air Stagnation Advisory due to calm winds and poor air circulation affecting air quality.

Saturday is off to a dry and cloudy start while much of the Portland area is under an air stagnation advisory from the National Weather Service through Monday. Saturday will continue to be mostly ...

On Wednesday at 10:55 a.m. the National Weather Service issued an air stagnation advisory valid from 4 p.m. until Monday 4 ...

An updated air stagnation advisory was issued by the National Weather Service on Friday at 2:02 a.m. in effect until December ...

The National Weather Service issued an Air Stagnation Advisory for Portland, affecting multiple areas and urging precautions ...

The month of November is ending dry, cloudy, and cool across the greater Portland, Vancouver metro area Saturday.

Southwest Washington and the Portland area can expect stagnant air through the weekend, according to the National Weather Service in Portland.

PORTLAND, Ore. ( KOIN) — Morning fog remains as clear, calm and cold conditions return to the Pacific Northwest Thursday morning.

Dry weather reins supreme through later next week. The Coast sees plenty of sunshine today, while the Valley remains trapped ...

Because of the very calm winds expected over the next several days, the National Weather Service has issued an Air Stagnation Advisory in effect through Monday afternoon. As the ridge peaks on ...