Dense Fog Advisory issued December 6 at 1:25AM MST until December 7 at 11:00AM MST by NWS Boise ID

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

* WHERE…Treasure Valley Zones and the Weiser Basin.

* WHEN…For the Dense Fog Advisory, until 11 AM MST Saturday. For
the Air Stagnation Advisory, until 5 PM MST Saturday.

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

* ADDITIONAL DETAILS…Fog could produce patchy black ice and slick
roads.