'Smokezilla'

Tim Durkan / Tim Durkan Photography

The eerie tinge to the air that deposited showers of ash in many areas of the Puget Sound region Tuesday seems to be subsiding. KNKX weather expert Cliff Mass says the worst of the smoky skies is over, pushed out by the approach of an upper level trough and cooler air moving in from the ocean.

The National Weather Service issued an excessive heat warning for western Washington and Oregon Wednesday and said the highs in Seattle on Thursday could hit 95 (35 Celsius) while Portland could reach 105 (40.5 Celsius).
Ted S. Warren / AP Photo

Seattle’s above-normal temperatures have been tempered somewhat by a grimy layer of smoke from British Columbia’s wildfires that moved in Tuesday. The influx has made air quality in and around the Emerald City worse than Beijing’s.

Even as the air cools a bit over the weekend, the temperatures will stay far above normal, with the haze dissipating only somewhat and quite slowly, says KNKX weather expert Cliff Mass, a professor of Atmospheric Sciences at the University of Washington.