Fata Morgana is an optical illusion caused by a temperature inversion. One viewer caught this rare phenomenon along the North ...

Ancient rocks once beneath the ocean hold clues of severe conditions unimaginable on today's planet. Artwork showing the Earth during the Cryogenian period. This geologic period lasted from 850 to 635 ...

It has been a split screen week in Central Oregon — with sunny skies and warm weather at Mount Bachelor, while Bend and other lowland areas have experienced freezing fog and bone-chilling temperatures ...

The U.S. Department of Energy recommends setting your thermostat to 68 degrees in the winter. You can save about 10% a year on heating by lowering the temperature 7 to 10 degrees when you are asleep ...

PORTLAND, Ore. (KOIN) — Oregon’s temperature inversion continues as stagnant air, fog, and chilly temperatures remain across much of the Pacific Northwest on Wednesday. A temperature inversion means ...

Add Yahoo as a preferred source to see more of our stories on Google. Boise’s location in a valley often causes it to experience inversions, but the current one has been unusually long. The inversion ...

Boise’s location in a valley often causes it to experience inversions, but the current one has been unusually long. The inversion even caused Treasure Valley residents to miss out on the beauty of ...

Anyone who traveled up to Mount Bachelor and back to Bend over the weekend may have asked: What’s up with the weird weather? Below-freezing conditions across lowland areas overnight left trees coated ...

Add Yahoo as a preferred source to see more of our stories on Google. As cooler temperatures have finally reached the Boise area, they have brought a slew of other weather-related phenomena. When the ...

Parts of the Bay Area are seeing wildly different temperatures thanks to an unusually “dramatic” weather pattern. A ridge of high pressure is causing a major temperature inversion in the Bay Area, ...

Residents awoke to a dense layer of fog blanketing the Treasure Valley on Thursday. Experts say a weather event known as an inversion is to blame for the misty morning — and it’s not going away ...

PORTLAND, Ore. (KOIN) — Warmer temperatures and abundant sunshine continue to build across the Pacific Northwest this week, but sensitive groups should avoid extensive time outside. Air quality ...