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

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

The atmospheric river's effects are expected to last at least through Tuesday, one meteorologist told Newsweek.

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 ...