The Tuesday storm is expected to come from the south and drop 2 to 3 inches in Monterey Bay. The East Bay is also expected to get around 2 to 3 inches through Christmas Day. The North Bay is expected to get the most rain, with 3-5 inches expected, Hoang said.

An atmospheric river is expected to impact California late Saturday night through Monday, delivering a concentrated plume of Pacific moisture capable of producing significant rainfall.

Parts of California are bracing for a series of rain and wind events over the next week as back-to-back atmospheric rivers move through the state.

After arriving in the region on Tuesday, the storm system is expected to stay through at least Saturday. It is set to produce the most rain Wednesday and Thursday, with forecasters saying it will bring a total of 3 to 5 inches of rain through Friday. It will likely be the most rain seen since a previous storm passed through the region last month.

Cowlitz River below Mayfield Dam also remains under flood warnings on Tuesday, “until further notice,” as the river flow has risen above 25,000 cfs—the flood stage threshold. Flooding is expected from Mayfield Dam downstream through Toledo, covering farmlands and roads, mainly near Toledo, as flows stay near 29,000 cfs through Wednesday.

NWS San Francisco issues Flood Watch for North Bay due to anticipated heavy rainfall from an atmospheric river event.

An atmospheric river will bring periods of rain and snow. While impacts continue, this system is not expected to be as strong as yesterdays front. Find out the details here.

(THE CONVERSATION) Along the U.S. West Coast, atmospheric rivers are dreaded for the damage they can cause, but they are also essential to the region’s snowpack and water supply, as Qian Cao, a hydrologist at the University of California, San Diego, explains.

After witnessing the tragic flooding in Washington this month, I couldn't help but wonder about the relationship between this very wet winter in the Pacific Northwest and La Niña. I knew the flooding was caused by a series of atmospheric rivers,