Buildings in the downtown area of Salt Lake City were barely visible Monday above the fog as seen in this photograph, taken from the Salt Lake City Cemetery. An inversion has kept valleys enveloped in smoggy, foggy conditions during recent days. The fog was expected to lift Tuesday as increasing clouds and a slight chance of rain developed. Monday the inversion held a lid on high temperatures, with readings ranging from 45 degrees in Salt Lake City, 46 in Draper, 49 at Alta and 65 at Brigham Young University. Temperatures were expected to reach the mid- to upper-40s across most of the valley and the mid-50s along the benches Tuesday. The chance of measurable precipitation was 20 percent late Tuesday, increasing to 40 percent Tuesday night.