El Niño and La Niña are climate phenomena that are generally associated with wetter and drier winter conditions in the ...

The weather phenomena are common for California winters, but they could cause dangerous debris flows or mudslides in recently ...

An atmospheric river is a long, narrow band of moisture that oftentimes comes ahead of a storm system. It's a big source of moisture for the Western U.S. and, specifically, the Sierra Nevada and ...

Heavy rain from the latest atmospheric river triggered flood warnings in several Bay Area counties and evacuations in Santa ...

Ahead of the storm’s arrival, officials in Southern California distributed sandbags, prepositioned rescue swimmers and told ...

While most people were trying to stay out of the rain on Thursday, a group of researchers was out in the thick of it ...

An atmospheric river gathers moisture from the tropics and moves it inland ... Those hoping for moisture in Arizona from ...

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 ...

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

A group of scientists from Southern California recently came to the Bay Area to send up a series of weather balloons to help ...