What causes an Inversion?

Wednesday, December 6, 2017 - 11:45am
US National Weather Service

Have you ever wondered...what causes inversion conditions in the Utah valleys? As high pressure builds into the area, the mid-atmosphere warms, while the valleys stay cool. This warm air acts like a lid that traps pollution from a variety of sources in the valleys. Expect inversion conditions to remain across the area through the next 7 to 10 days. More info is in the graphic.