Active AlertsUpper Weiser River

What: An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants.
Where: Portions of south central and southwest Idaho and northeast and southeast Oregon.
When: Until 5 AM MST /4 AM PST/ Saturday.
Impacts: Poor air quality may cause issues for people with respiratory problems.

Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air.