Dense Fog Advisory issued December 10 at 3:19AM MST until December 10 at 12:00PM MST by NWS Boise ID

* WHAT…For the Air Stagnation Advisory, 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. For the Dense Fog Advisory, visibility one quarter
mile or less in dense fog.

* WHERE…Portions of southwest and west central Idaho and southeast
Oregon.

* WHEN…For the Air Stagnation Advisory, until 2 PM MST Thursday.
For the Dense Fog Advisory, until noon MST today.

* IMPACTS…Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.