Alerts from the National Weather Service span swaths of the northern U.S. early Saturday, as heavy snow could appear.

The Tuesday morning commute could be messy across northern New Jersey with the storm starting as snow and changing to rain, forecasters say

A lot of snow, rain and cold weather await travelers for the rest of the Thanksgiving holiday weekend, with winter storm warnings posted Friday across the northern part of the country and more snow falling over the Great Lakes region. Storm warnings and advisories extended from Montana to New York, the National Weather Service said.

A winter storm system is expected to intensify Saturday morning, bringing steady snow showers and creating potentially hazardous travel conditions across Illinois, Missouri, Iowa, Wisconsin and Michigan. Chicago, Minneapolis, Milwaukee, St. Louis, Indianapolis, Detroit and Roanoke, Virginia, are a few of the cities at risk through the weekend.

A more significant winter storm is expected Tuesday, which could produce widespread snowfall across the state.

Precipitation may begin as a mix of wet snow and rain across inland areas Sunday morning before transitioning to all rain by afternoon as temperatures rise. The Jersey Shore should see high temperatures in the low to mid 50s, while inland locations remain in the 40s.

A winter storm could bring 8 to 12 inches of snow to southern Wisconsin. For those without shelter, there are six warming centers across the city.

A winter weather advisory was released by the National Weather Service on Saturday at 1:25 p.m. valid for Sunday between 3 a.m. and noon for Westmoreland Ridges and Fayette Ridges.