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).
Friday, July 28, 2017
Way more smoke in the Methow Valley. Not much change over the weekend
While smoke drained into the Methow as expected, the amount of smoke was an unpleasant surprise. Air quality in Winthrop has been Unhealthy since midnight and Twisp quickly caught up when the morning inversion broke. Expect some gradual improvement during the day, but not hopeful it will get any better than Moderate today.
A repeat of last night and this morning beckons on Friday and Saturday nights into the following morning, because winds will be terrain- driven each day. Slightly stronger winds on Sunday will help disperse the smoke, leading to Good to Moderate AQ in the Methow.