Dense Fog Advisory issued December 3 at 6:38PM MST until December 5 at 2:00PM MST by NWS Boise ID

* WHAT…For the Air Stagnation Advisory in valleys, 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…Lower Treasure Valley Zones.

* WHEN…For the Air Stagnation Advisory, until 5 PM MST Saturday.
For the Dense Fog Advisory, until 2 PM MST Thursday.

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

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