Atmospheric rivers are long and relatively narrow bands of water vapor that form over an ocean. Some get the nickname ...

Ahead of the storm’s arrival, officials in Southern California distributed sandbags, prepositioned rescue swimmers and told ...

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

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

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

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

When they hit land they can cause heavy rains and snow. Here's a look at the phenomenon: What is an atmospheric river? Atmospheric rivers are long and relatively narrow bands of water vapor that ...

Many atmospheric river events are weak. But the powerful ones can transport extraordinary amounts of moisture. Studies have shown that they can carry seven to 15 times the average amount of water ...

Editor's note: This page reflects news from Wednesday, Feb. 12. For the latest updates on the atmospheric river in California, read USA TODAY's coverage for Thursday, Feb. 13. SAN DIEGO ...

When they hit land they can cause heavy rains and snow. Here’s a look at the phenomenon: WHAT IS AN ATMOSPHERIC RIVER? Atmospheric rivers are long and relatively narrow bands of water vapor that ...