Areas charred by last month's wildfires in Southern California now face a new threat from a powerful, but fast-moving Pacific ...

Days after an atmospheric river brought record-setting rainfall to California, the state is in the crosshairs of another ...

Weather balloons and “hurricane hunter” planes aid the science of understanding California’s atmospheric rivers.

An expert at the Scripps Institution of Oceanography explains the weather phenomenon that can wreak havoc across California.

An atmospheric river is forecast to bring torrential rain to California this week, threatening parts of the state with flash floods and mudslides.

A new rain storm is bearing down on California, including fire-ravaged Los Angeles, where residents are bracing for the possibility of mudslides and landslides.

Hydrologist Erin Walter with the National Weather Service in Grand Junction said the storm carries significantly more ...

There's no shortage of organizations and high-profile individuals driving Southern California's wildfire recovery. Have they ...

Southern California faces a risk of damaging debris flows this week, as a potentially strong atmospheric river is set to ...

A Pineapple Express forms when the jet stream dips south into the tropical Pacific near Hawaii, scooping up warm, moist air ...

The storm system that cut a path from Kentucky to Maryland and points farther north on Tuesday brought more than 14 inches ...