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

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 ...

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 ...

Rare rime ice and ground-level ice crystals form across Boise as deep temperature inversion creates perfect conditions for dual winter phenomena.

KOIN 6 Chief Meteorologist Josh Cozart explains the temperature inversion seen around Mt. Hood Wednesday afternoon, January 21, 2026.