It's the same story, different day when it comes to the dirty air this weekend in northern Utah.
The urban haze, as the National Weather Service likes to call it, will increase today along with patchy fog in parts of the northwest desert and in Cache Valley. Slight 5-mph wind also is expected later tonight.
The highs in Salt Lake City today will reach 40 degrees, with an overnight low around 21. The haze will continue through Monday afternoon. Highs Sunday will be near 41 with lows in the lower 20s.