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