Satellite imagery and ground- based fine particle pollution monitoring data show that smoke from the Lytton fire in British Columbia and the Lava Fire in northern California is mostly overhead right now. Gray polygons are smoke plumes (darker gray = denser smoke) and the circles/ squares are monitors measuring Good (and some Moderate) air quality.
Forecast models are showing that some of this smoke will make it down to the surface in eastern WA later today. This is also true for the higher terrain of the Cascades. However we're not expecting anything worse than Unhealthy for Sensitive Groups. Please continue to follow the five-day smoke forecast.
We're expecting winds to shift July 4-5, which should improve air quality statewide... if we can avoid any new fires. Local fireworks shows could result in levels as high as Unhealthy for Sensitive Groups near the demonstrations.
Puget Sound lowlands forecast
We do not expect smoke to reach the ground in most of western WA, so air quality should be mostly Good to Moderate. A few pretty sunsets are possible.
Be Ready to Protect Your Health