Map of Sierra Nevada in California showing how an atmospheric river develops. Most atmospheric rivers are weak and do not cause damage. In fact, they can provide much-needed rain or snow.

Atmospheric rivers are more common during the winter months, but officials are warning people not to let their guard down.

Languages: English. The atmospheric river arrived on Tuesday. It is bringing up to four feet of snow to high elevation areas, heavy rain to Southern California and strong winds statewide.

As atmospheric rivers pounded the U.S. West Coast last winter, scientists deployed increasingly advanced observing tools over ...

A series of atmospheric river events during the winter and spring have caused reservoirs to swell to more than 118% than is ...

MIKE CHERRY AND I’M BRANDI CUMMINGS. THANKS FOR BEING HERE. WE WANT TO SHOW YOU A LIVE LOOK RIGHT NOW AT THE TRUCKEE BYPASS ON THIS KCRA 3 WEATHER IMPACT DAY. SURE DOESN’T LOOK LIKE SPRING AT ...

Such atmospheric river events are known to provide much of California's wet season rainfall, as well as its worst flooding. Flights from the West Coast to Hawaii and Asia next week may take longer ...