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

Flood warnings issued in parts of Southeast as heavy rains and severe storms threaten. And melting snow could lead to ice jams in some areas.

What's an Atmospheric River? A Pineapple Express ... While traditional cold winter storms out of the north Pacific build the Sierra snowpack, atmospheric rivers tend to be warm.

The weather phenomena are common for California winters, but they could cause dangerous debris flows or mudslides in recently burned areas. An atmospheric river is coming to California. It could ...

"This atmospheric river will bring with it multiple inches of rain from the North Bay Area all the way down the coast to San Diego," said AccuWeather Meteorologist Jacob Hinson in an online ...