The air stagnation advisory in place for the mid-valley has been extended through at least noon on Tuesday.
The National Weather Service office in Portland says air quality may deteriorate each day due to stagnant air over the region. Smoke from wood stove and pile burns will have difficult dispersing. Persons with respiratory illnesses should follow their physician's advice for dealing with high levels of air pollution.
For updated air quality information, check the Oregon Department of Environmental Quality's Air Quality Index.
An air stagnation advisory is issued when, due to limited movement of air mass across the affected area, pollution may increase to dangerous levels.
Here are your updated local forecasts:
Sunday: Sunny, with a high near 51. Northwest wind 3 to 8 mph.
Sunday night: Mostly clear, with a low around 29. North northwest wind 5 to 7 mph.
Monday: Sunny, with a high near 49. Light north northwest wind.
Sunday: Sunny, with a high near 50. North wind 5 to 9 mph.
Sunday night: Mostly clear, with a low around 30. North wind 6 to 8 mph.
Monday: Sunny, with a high near 49. North wind around 5 mph.
Sunday: Areas of fog before 10 a.m. Otherwise, sunny, with a high near 50. Calm wind becoming northwest around 5 mph in the afternoon.
Sunday night: Patchy fog after 10 p.m. Otherwise, mostly cloudy, with a low around 31. Calm wind.
Monday: Areas of fog before 10 a.m. Otherwise, mostly cloudy through mid-morning, then gradual clearing, with a high near 49. Calm wind.