The definition: An atmospheric river (AR) is a long plume of moisture that stretches from the tropics or subtropics into ...

KOIN 6 Meteorologist Josh Cozart shares Portland's wintry mix, winter cold and sunshine, to an atmospheric river that's expected over the next week.

A group of scientists from Southern California recently came to the Bay Area to send up a series of weather balloons to help ...

Atmospheric rivers, also described as "rivers in the sky," cause more than 80 percent of all flooding damage across the West ...

Lake Shasta waters swelled after heavy winter rains from an atmospheric river. Here's how much rain fell and how many feet ...

The weather system near Hawaii — one source that will help fuel the weekend atmospheric river in the West — produced prolific precipitation. According to Weather Service data, rainfall in ...

A storm system will bring rain to northern California starting on Friday, and will give us a good chance rain next week.

Parts of northern and central California saw more than two inches of rain Tuesday as Southern Californians face rain through ...

The Atmospheric River Reconnaissance program Field headed by the Scripps Institution of Oceanography utilize hurricane hunter aircraft and data from buoys to improve forecasts. Dropping sensors ...