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

The Pineapple Express is an atmospheric river in the sky that comes from the Pacific near Hawaii. When it hits the California ...

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

These "rivers in the sky" have been responsible for as much as 65% of the West's extreme rain and snow events, a 2017 study said. AccuWeather warned of possible flooding, avalanches, strong ...

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

While driving home, Ari Shulman said a "spray of sparks" in the sky caught his attention as he watched in horror the midair ...

Impact from a moisture-laden storm is expected to persist in the San Francisco Bay Area through Friday, with more rain likely ...

Atmospheric rivers are a "long, narrow region in the atmosphere—like rivers in the sky—that transport most of the water vapor outside of the tropics," according to the National Oceanic and ...

Atmospheric rivers are long, narrow regions of water vapor in the atmosphere, like a river in the sky. These systems gather moisture from the tropics near the equator and move it toward the poles.