Dangerous snow storm heading toward New York City, New Jersey, upstate New York: Latest forecast

A major winter storm is making post-Christmas travel extremely dangerous in parts of the Northeast, and the storm is set to bring the most snow to New York City in years.

The storm is also affecting flights. More than 1,000 flights have been canceled so far on Friday, with the three airports in New York City and Detroit Metro Airport being the most affected.

The storm hit the Midwest first. People in Wisconsin and Michigan are waking up to a layer of ice on the roads, so drivers should be extra careful.

On Friday morning, the freezing rain is moving east into Pennsylvania and will cover the entire state throughout the day, making roads very dangerous. An ice storm warning has been issued for nearly 1 million people in parts of western Pennsylvania.

On the north side of this storm, where temperatures are cold enough to form snow instead of ice, heavy snow is expected in parts of New York, eastern Pennsylvania, New Jersey, Connecticut, western Massachusetts and Rhode Island.

Snow will begin falling in western New York on Friday morning and reach New York City by 5 p.m. Friday.

The snow will be heavy at times and will greatly reduce visibility, making travel treacherous.

Snow will continue to fall throughout the night, ending in New York City around 9 a.m

New York City is expected to receive 7 inches of snow, the most in nearly four years.

Winter storm warning for the tri-state area. Up to 6 to 9 inches of snow is possible in upstate New York, and 10 inches in the Hudson Valley. Five to 8 inches is expected in northern New Jersey, while it could reach about 4 inches in Hartford, Connecticut.

Philadelphia can expect freezing rain and 1 to 3 inches of snow, as well as a coating of ice, making travel difficult Friday night. Baltimore can also expect icy roads.