Millions of Americans live in areas under winter storm alerts stretching from northern Minnesota to the Eastern Seaboard.

NWS warns of a severe winter storm with blizzard conditions across six states, threatening post-holiday travel.

Hundreds of flights were canceled and thousands delayed Saturday as a winter storm hit the U.S., with more disruption expected.

At the Pacoima Wash in San Fernando, a person called 911 to report seeing a woman in the fast-moving waters, the Los Angeles Fire Department said. Crews were using markers to try to find the woman, who was wearing all black and traveling at 25 miles per hour in three feet of water. They did not find her.

The National Weather Service said two more impulses will move through the area with the potential for flooding in the burn scar areas.

A Winter Storm Watch is in effect ahead of a powerful winter storm coming in from the Ohio River Valley that could bring widespread snow to NYC and the Tri-State.

At 1:24 a.m. on Monday, the National Weather Service issued a winter storm watch valid from Tuesday 10 p.m. until Friday Dec. 26, at 10 a.m. for the Greater Lake Tahoe Area.

Southern California is in for a wet Christmas week, with four days of rain expected to begin Tuesday, forecasters said Sunday. A flood watch was issued for Tuesday afternoon through Wednesday evening for much of Los Angeles County,