An atmospheric river is expected to bring torrential rain to California this week, threatening parts of the state with flash ...

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

The only category worse is “exceptional” drought ... Northern California is primed to get three atmospheric river storms, according to Courtney Carpenter, a meteorologist with the weather ...

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 ...

Days after an atmospheric river brought record-setting rainfall to California, the state is in the crosshairs of another rainy storm system.

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 ...