Note: Some users might notice intermittent discrepancies in colors shown on the map of air quality monitors above, and those reported on the Department of Ecology's official page. This is because Ecology believes their method of calculating the air quality category (i.e. “Good”, “Moderate”, Unhealthy” etc) is more protective of public health in Washington. If in doubt as to which better represents public health risk, use the more stringent of the two (i.e. the map showing worse air quality).
Wednesday, August 5, 2015
Smoke forecast through Friday 7 August
Expect Thursday to be similar to today with breezy conditions helping keep smoke levels down, but also increasing fire spread risks. In general, air quality will degrade a bit overnight while improving to mostly Good during the day. Winds are likely to move smoke from the Wolverine fire toward Chelan, but a good deal of it will stay aloft during the daytime.
Friday will see calmer winds and warmer temperatures. Winds closer to the mountains will be driven by terrain, with upslope winds during the day and downslope flows at night. Overnight smoke will be slower to clear out during the day, and air quality in Chelan could become Unhealthy by Friday night. Other areas are likely to vary between Good and Unhealthy for Sensitive Groups.
Some smoke clearing is likely for the weekend, and that will be addressed in more detail on Friday.