A winter storm warning is in effect for most of Ohio, Indiana, and all of Kentucky. Total snow accumulations of 8 to 12 inches are possible, with the heaviest snowfall expected on Sunday. Dangerously cold temperatures and wind chills below zero are expected to follow the storm.

Up to a foot of snow is expected across several states due to the winter storm, with ice accumulating farther south.

Major winter storm threatens widespread power outages across the US starting Friday. Essential tech prep tips to keep devices charged and stay connected.

At 1:19 a.m. on Saturday, the National Weather Service issued an updated winter storm warning valid from Sunday 3 a.m. until Monday 6 p.m. for Passaic, Hudson, Bergen, Essex and Union counties.

Follow live updates as a winter storm is expected to bring heavy snowfall, icy roads and cold temperatures from the southern states to the Northeast.

The National Weather Service issues a litany of notices before and during inclement weather events. They can be important signals on how to respond.

The major storm is set to hit starting on Jan. 23 and will stretch into the weekend, spreading snow and ice from the southern Plains to the Northeast.

The coldest air and highest ice risk from the winter storm will arrive early Sunday morning, ending Sunday afternoon.