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

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

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

An atmospheric river is a weather feature that can be beneficial and crucial, but can also be a damaging event - particularly for those near the West Coast of the United States. The definition ...