The second peak of an ongoing atmospheric river storm arrived in Northern California Monday afternoon, prompting flood watches and a winter storm warning up in the Sierra.

Here's the latest forecast for an upcoming winter storm that forecasters hope could finally lift Los Angeles County from the throes of a devastating fire season.

More rain is on the way after Redding got 8 inches of rain in three days due to an atmospheric river. Here's a weather update.

"We do have a Flood Watch in effect across the area from this afternoon to late Tuesday night," Kurth said. "Much of the Sacramento area will be relatively dry early and then we'll see precipitation spreading from north to south through the day. So, afternoon and especially tonight we'll see some of that moderate to heavy rain."

Heavy precipitation is falling mostly in mountain areas. A flood watch in also in effect for the coast of central California, including the San Francisco Bay Area and Sacramento Valley.

Heavy rain and snow will hit Northern California throughout most of this week as an atmospheric river moves through.

Atmospheric river after atmospheric river is rocking the West with relentless heavy rain and snow. This moisture, originating from Hawaii, is known as a Pineapple Express. A second storm is forecast to follow closely behind the first,

The West Coast is in the middle of a long-lasting and potent atmospheric river event, which will bring days of heavy rain and mountain snow throughout the week ahead.

A series of atmospheric rivers continue to take aim at the West, dumping heavy rain and snow across the region. Places like Seattle and Portland will see more accumulating snow while others like San Francisco and Los Angeles will see a flood threat as a result of more heavy rain.