Another atmospheric river is walloping storm-ravaged California, inundating cities already flooded by recent rain and forcing residents to flee – or risk not getting help if they need it.

Meteorologists have begun to use the term "atmospheric river" to better warn a region about the potential impact of an incoming system.

Like a truly unwanted guest, an intensifying sub-tropical atmospheric river was now expected to arrive early, crashing into Northern California on Thursday afternoon.

SONOMA COUNTY, CA —Forecasters expect the Russian River to reach minor flood stage this week as an atmospheric river brings heavy rain, urban and river flooding, and strong winds to the North ...

"The average atmospheric river carries an amount of water vapor roughly equivalent to the average flow of water at the mouth of the Mississippi," NOAA states.

Wet snow fell in Cherry Valley, CA Thursday morning as part of an atmospheric river moved across the state. Snowfall accumulations of 1 to 3 feet are possible at higher elevations (Video Credit ...

California's snowpack is at only 58 percent of the average, while this time last year it was at 214 percent.

A new atmospheric river is slamming California, including fire-ravaged Los Angeles, where residents are bracing for the possibility of mudslides and landslides.

Search and rescue crews in B.C.'s Lower Mainland say they are on standby to help with possible evacuations as an atmospheric river makes its way through southwestern B.C. on Saturday. The heavy ...

While one atmospheric river is still pumping rain toward California, another storm is waiting in the wings.

Street flooding and mudslides, and a weak tornado, were reported across the region as the storm barreled through Thursday evening.