This story was updated to correct spelling in headline. An atmospheric phenomenon called a Pineapple Express is expected to bring heavy rains and snowfall to California and the Northwest this week.

Atmospheric rivers are a plume of moisture that extend across the Pacific to near Hawaii. When they hit land they can cause ...

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

Forecasters say 'Pineapple Express' storm will probably be beneficial for Los Angeles and Ventura counties, helping to reduce ...

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

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