Al Roker is back on Today two days after the death of his ex-wife, Alice Bell. After his absence from Today on the Tuesday, ...

A series of small earthquakes rattled the San Francisco Bay Area late Thursday morning, adding another challenge to what is ...

Many atmospheric river events are weak. But the powerful ones can transport extraordinary amounts of moisture. Studies have ...

The weather phenomena are common for California winters, but they could cause dangerous debris flows or mudslides in recently ...

New research at NAU looks at faster warming in the Arctic, and highlights concern about risks to the U.S. of a political ...

Scientists have identified a new threat that could disrupt the commercial airspace as at least three deadly crashes have ...

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

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

Pineapple Express has drenched Northern California in the last few days—but what exactly is it? How common is it? Also, go ...

Some of us remember the first Earth Day, Saturday, April 22, 1970. We pulled old bedsprings and tires out of local rivers and urged a ban on phosphates that fueled weed growth in streams and ...

Several roads in Sutter County were closed due to flooding, including three that cross the Sutter Bypass, which is once again filling with overflow from the Sacramento River to be transported across ...

A pineapple express is a type of strong atmospheric river that carries moisture toward the western U.S., bringing the risk of ...