The New York City area accumulated just above 4 inches of snow as difficult travel conditions are expected through Saturday while crews work to clean up this wintry mess.

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

A winter storm is set to impact Minnesota, with hazardous travel conditions expected, and a blizzard warning issued for several parts of the state.

The timing of the winter storm is expected to turn roads treacherous on Friday evening across most of New Jersey with a mix of snow, sleet, freezing rain.

Winter weather event having more than one predominant hazard (i.e., snow and ice, snow and sleet, or snow, ice & sleet) meeting or exceeding advisory criteria for at least one of the precipitation elements, but remaining below warning criteria

A winter storm warning is in place for the Twin Cities from 9 a.m. Sunday to 6 a.m. Monday, and in the Duluth area from 12 p.m. Sunday to 3 a.m. Monday. There is a blizzard warning for the southeastern parts of Minnesota, including the Mankato and Willmar areas from 9 a.m. Sunday to 6 a.m. Monday.

The National Weather Service has issued winter storm watches for 16 New Jersey counties with snow and sleet in the forecast for Friday.

A Severe Thunderstorm Warning has been issued for east central Ventura County and northwestern Los Angeles County until 8:30 a.m.

Several days of rain and powerful wind gusts are in the forecast this week when a winter storm has already led to evacuation warnings in parts of Los Angeles County settles into Southern California for the holiday.

Officials in Los Angeles and surrounding counties warned that the giant holiday storm could trigger "widespread flash flooding."

Little to no additional snow accumulation is expected after some New York City areas were hit with the heaviest snowfall in years, forecasters said.