PNW folks: plan to stay indoors for the next few days
CA smoke is moving north, BC smoke is moving south. Winds are blowing from the east, bringing in smoke from Chelan etc. Until now the particulate matter has been mostly aloft but these easterly winds will bring dangerous air quality to the surface. The situation may improve Wednesday or Thursday.
Cliff Mass Weather and Climate Blog: Dense Canadian Smoke Veil Moves Southward over Washington State