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, Utahns ...

Have you ever walked outside in Pueblo on a cold morning and seen the haze in the sky? Or watched our morning forecasts and seen Woodland Park is warmer than Pueblo? It’s very common at this time of ...

A long stretch of humid heat followed by intense thunderstorms is a weather pattern historically seen mostly in and around the tropics. But climate change is making humid heat waves and extreme storms ...

You might feel like holding your breath the next few days! Unfortunately, a prolonged inversion is expected to last until later this week. During an inversion, cold air is trapped in the valleys by a ...

Cool weather and the holiday season may seem like the perfect excuse to cozy up by the fire, but too many blazing yule logs can dirty the air and put some of your neighbors at risk. Hazy skies are a ...

Valley inversions across northern & central Utah will stay in place through Saturday. With cold air trapped in the valleys, some temperatures could drop a little lower than yesterday. As the inversion ...

AIR STAGNATION ADVISORY is in effect until 5 PM Wednesday for the Kootenai/Cabinet Region, Lower Clark Fork Region, Missoula/Bitterroot Valleys, Bitterroot/Sapphire Mountains and Potomac/Seeley Lake ...

A view from the foothills north of Tucson Wednesday might have been a preview of a winter phenomenon: air inversions that trap pollutants near the ground and form a sort of brown cloud. Haze was ...