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

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

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 ...

The first in what’s expected to be a series of three atmospheric river storms has arrived in California. Forecasters are hopeful the winter storms might finally lift Los Angeles County from the ...

The atmospheric river is being driven by a low pressure system midway between Hawaii and the West Coast, as well as a secondary low-pressure system offshore of the Pacific Northwest. Both are ...

An atmospheric river is slamming portions of California, with multiple inches of rain expected to drench the area until the storm runs out of moisture Wednesday morning, forecasters say.

A flooded street in Santa Barbara, California, is shown on February 4, 2024, exactly one year ago, as a potent atmospheric river storm, the second in less than a week, doused the region.

A stronger atmospheric river is set to hit Northern California on Monday and then hit Los Angeles County on Tuesday, aiding hopes of a more definitive end to a devastating fire weather season for ...

An atmospheric river gathers moisture from the tropics and moves it inland. California will see heavy rain and snow in some areas, mostly in the north. Arizona will not only remain dry ...