Valley fog expected tonight in Treasure Valley as melting snow adds moisture. Temperature inversion strengthening with patchy ...

There can be long stretches throughout the year, especially during the winter, when it doesn't seem like the clouds want to break up. The lack of sunshine can come from what meteorologists call a ...

Oregon’s temperature inversion continues as stagnant air, fog, and chilly temperatures remain across much of the Pacific ...

Treasure Valley inversion strengthens as stratus deck expands across region. Valley temperatures stuck in 30s while mountains ...

Anyone who traveled up to Mount Bachelor and back to Bend over the weekend may have asked: what’s up with the weird weather?

Normally, as you go higher into the atmosphere the air gets cooler, but during a temperature inversion, warm air sits above cooler air near the ground. This shift in temperature plays a key role in ...

A rare temperature inversion has flipped Bay Area weather, warming mountain ridges while cold, foggy valleys grapple with poor air quality and low visibility.