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As chilly temperatures mark the start of Utah’s holiday season, they also bring an unwelcome visitor to the state’s northern valleys — inversions and the dirty air trapped inside them.

An inversion above Utah Valley increases the number of pollutants in the air. Large storm systems can push the polluted air out of the valley. (Photo courtesy of Chris Bunker) Each winter ...

SALT LAKE CITY — Unlike holiday lights that brighten neighborhoods, the inversion currently muddying air across northern Utah is one of the more unwelcome aspects of the winter season.

Unhealthy air will continue to plague much of Utah until Friday, when a “significant” snowstorm is expected to clear out lingering Wasatch Front and Cache Valley inversions. An inversion forms ...

The Salt Lake Valley—which sprawls about 500 square miles and includes Salt Lake City—has a bowl-like topography that makes it a prime spot for inversions, says Kerry Kelly, a chemical engineering ...

Bryce Bird, director of the Utah Division of Air Quality, said the current inversion is expected to linger for most of the week if not longer. Monday's conditions weren't as bad. Air Quality Index ...

However, due to the Beehive State's cloud coverage along with the thick inversion Utah has been experiencing the last couple of days, the changes of actually seeing the Northern Lights are slim ...

(Photo by Spenser Heaps for Utah News Dispatch) Winters in Utah usually come with inversions, smoggy lines of stagnant pollution dividing the Salt Lake Valley. And often, during the summer ...

Known as an inversion, the weather event occurs when a layer of warmer ... a pulmonary and critical care physician at University of Utah Health. “Long-term exposure can cause many different health ...