After a day of relief from the smoke in Central Washington it's back says Dave Caprilie with the Yakima clean air authority. Like Yakima , Wenatchee and Cashmere enjoyed relatively clean air for about half a day before smoke from the area wildfires returned Tuesday night. 

A building ridge will cause a return to stagnant conditions through Friday. This morning, Cashmere is recording hazardous air quality levels, while Wenatchee crept into the unhealthy range. Air quality in Entiat, Pateros and Trout Lake, near Mount Adams, is unhealthy for sensitive groups, and of moderate concern in Chelan and Ellensburg.  Officials say strong nighttime inversions and light winds will ensure smoke hangs around over the next few days, though some partial clearing is expected most afternoons this week.