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

The bottom line? High pressure ridge continues to build with declining air quality in northern valleys but rebounding ...

Dense Fog Advisory issued for western Idaho's Treasure Valley as strengthening inversions trap cold air and create hazardous ...

We explain the record-breaking ridge of high pressure setting up over British Columbia. The atmospheric pattern is creating a ...

High pressure overhead is diverting clouds and wet weather to our north. Under this high pressure, a bit of an inversion is ...

It didn't take long for air quality to plummet across the Wasatch Front and surrounding regions from the latest inversion ...

A stubborn ridge of high pressure will remain parked over the region through the rest of the work week and into the weekend, ...

The bottom line? A big ridge of high pressure has set up shop across the western U.S. leading to inversion haze, bad air quality, and cooler valley temperatures.

The higher the AQI values, the higher the breathing discomfort to people with lung disorders, asthma and heart diseases.

High pressure will keep the region under a stagnant weather pattern through early next week. Expect valley fog, low clouds & ...

Tuesday is anticipated to be the warmest day with highs climbing well into the 50s, with a few locations perhaps cracking the ...

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