While inversions are common in the Treasure Valley, this one has lasted an unusually long time. What’s going on? When will it ...

As the cool air sinks, the warm air rises over the top and traps the cold air below. If you travel from downtown Boise to the ...

An Arctic blast of bitter cold is set to hit the eastern half of the country this week as Utah deals with the worst air ...

Treasure Valley inversion strengthens as upper ridge moves overhead, bringing continued fog and air quality issues before ...

Hundreds of thousands of Americans awoke to hazardous air quality as fine particle pollution, known as PM2.5, surged across Georgia, South Carolina, and Oregon. Winter temperature inversions trapped ...

High pressure in place will contribute to dry, clear skies in the week ahead, while also creating a temperature inversion.

A ridge of high pressure will be centered over the region through the weekend, continuing a pattern of quiet, stable and ...

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

Utah continues to have some of the worst air quality in the U.S. amid the latest temperature inversion impacting the Wasatch Front, which began shortly after Thanksgiving. Inversions form when cold ...

PORTLAND, Ore. (KOIN) — Warmer temperatures and abundant sunshine continue to build across the Pacific Northwest this week, ...

A persistent high pressure ridge over the West Coast is prolonging a temperature inversion that acts like a lid over Baker ...

KOIN 6 Chief Meteorologist Josh Cozart explains why Portland's temperature inversion is causing poor air quality across the ...