The definition: An atmospheric river (AR) is a long plume of moisture that stretches from the tropics or subtropics into ...

Places like California, Oregon, Washington, Idaho, Utah and Nevada are (somewhat) used to this sort of phenomenon. You can ...

Heavy rain is hitting the Bay Area and coastal areas this week as an atmospheric river moves through Northern California.

An atmospheric river is expected to bring three major storms with significant rain, snow and wind to Northern Nevada for the next several days. But what is an atmospheric river? Here's a look at ...

Parts of northern California could see up to a foot of rain, but Phoenix will remain dry and warmer than usual.

A stronger atmospheric river is set to hit Northern California on Monday and then hit L.A. County on Tuesday, aiding hopes of ...

Heavy precipitation is falling mostly in mountain areas. A flood watch in also in effect for the coast of central California, ...

What is a Pineapple Express? It's a type of atmospheric river that forms a long, narrow tract in the Earth’s atmosphere. This jet stream gathers moisture from the tropics near the equator and ...

Here's the latest forecast for an upcoming winter storm that forecasters hope could finally lift Los Angeles County from the ...

While the wet weather may bring an end to a devastating run of wildfires in the state, it could also cause flooding and other ...