Dense Smoke Advisory issued September 05 at 9:18PM PDT until September 07 at 12:00PM PDT by NWS

...Gusty winds in the Shasta and Scott Valleys... ...Dense smoke expected through midday Thursday... .Gusty winds have developed in the Shasta and Scott Valleys. These winds will diminish later tonight, but may return Wednesday afternoon and evening. Periods of dense smoke will persist through midday Thursday

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2xNG7Cu