The smoke was back in Carson Valley this morning with readings in the unhealthy range and higher as the prevailing southwest wind returned.
Coming from the Rim fire burning into western Yosemite about 75 miles south of Gardnerville, the smoke prompted National Weather Service forecasters to predict it will continue through this week.
The densest smoke is expected in Alpine and northern Mono counties in the afternoons and evenings, when visibility could be less than a mile at times.
Prevailing southwest winds are expected to continue through Thursday.
The Rim fire grew to 228,670 acres overnight with lines around 60 percent. But the fire continues to burn in the north and the south and southeast flanks into Yosemite National Park.
Southwest winds are expected to increase burning to the north today. The Rim fire is the largest fire burning in the United States this year and is the fourth largest California wildfire in 80 years. More than a quarter of the fire is burning in Yosemite National Park which represents 8 percent of the park’s total area. Containment is expected by Sept. 20.