The Air Quality Alert has been extended until 10 AM Wednesday as a Red Flag Warning continues.
The air quality over much Western Washington has reached unhealthy levels due to easterly winds bringing smoke from wildfires in Eastern Washington. These smoky conditions may vary at times, but are expected to generally persist into Wednesday and have prompted the Air Quality Alert.
Unhealthy air quality means that everyone, especially sensitive groups, should limit time spent spent outdoors, avoid strenuous activities outdoors, and choose light indoor activities.
The Red Flag Warning remains in effect until 11 PM Thursday as gusty winds and low humidity remain with hot, dry and unstable conditions for much of Western Washington including the Black Hills, Southwest Interior Lowlands, and East Portion of the Olympic Mountains. Forecasters expect east wind 10 to 20 MPH with gusts up to 35 MPH to continue. Relative humidity will be as low as 17 percent and mid-level Haines index values of 5 (with isolated areas of 6 possible) also expected. The combination can contribute to rapid rates of fire spread and down wind spotting on existing fires.
A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended as all outdoor burning (including recreational fires) has been banned since mid-July.