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

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

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

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.

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

There is now a 30% chance of intense rain between Feb. 12 and 15 in Los Angeles, Ventura, Santa Barbara and San Luis Obispo ...

The Bay Area saw significant storm impacts Tuesday as an atmospheric river brought heavy rain, urban and river flooding, and ...

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

Another storm will impact Northern California starting Thursday morning. That event is forecast to be somewhat less impactful than the high winds and mudslides on Tuesday that caused a home to ...

Another storm will impact Northern California starting Thursday morning. That event is forecast to be somewhat less impactful ...

The jet stream is like a river of west-to-east winds in the upper atmosphere. Airplanes use it like a highway. A wet pattern will bring periods of rain and showers to Southern California ...

After an atmospheric river doused the North Bay Tuesday, forecasters say more rain will return to the region Thursday and ...