High pressure will be the dominant feature of our through Saturday. This will lead to the development of valley inversion, and these inversions will set the stage for areas of valley fog and low ...

Valley inversions are already settling in across the region and are expected to strengthen as we approach Wednesday. Expect a low deck of stratus clouds/fog to develop and become more widespread as ...

Add Yahoo as a preferred source to see more of our stories on Google. Smog blankets the Salt Lake valley during an inversion on Monday. Inversion conditions are expected across the Wasatch Front, ...

It happens every winter, and a lot of you dread it for good reason! As cold air stays trapped in the valleys by a layer of warmer air above it, pollution builds until a change in the weather helps ...

Or at least don't breathe too much, the folks at the Mesa County Health Department recommend. The current inversion hanging over the Grand Valley prompted the department to issue an air watch alert ...

Visibility was reduced to less than one quarter of a mile on Wednesday morning as fog enveloped Boise. Sarah Miller Dense fog is set to envelop the Treasure Valley for the rest of the week, as an ...

It's been very foggy across Central California this winter, with the longest stretch of non-stop foggy days since the 1970s. But why has it been so foggy?