* 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, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN…From 9 PM MST /8 PM PST/ this evening to 11 AM MST /10 AM
PST/ Friday.
* IMPACTS…Poor air quality may cause issues for people with
respiratory problems.