The National Weather Service upgraded the previous Winter Storm Watch into a Winter Storm Warning, which is set to go into effect for the Chicago area at 3 a.m. Saturday and remain in effect until 6 a.m. Sunday. The warning expires Sunday at midnight for Ford, Iroquois, Illinois and Benton, Jasper and Newton, Indiana.

Over 500 flights were canceled at Chicago airports on Saturday morning as a winter storm bringing up to 10 inches of snow moves into the area.

The Chicago area was bracing for a major snowstorm this weekend and dangerous holiday travel conditions, as a winter system threatened to dump nearly a foot of snow on the region. A winter storm warning was issued for the entirety of the Chicago area and northwest Indiana,

A major weekend snowstorm is set to bring 6 to 12 inches of snow across Chicagoland, followed by dangerous cold next week.

Icicles formed at a slant on a Chicago pier thanks to the wind, and Lake Michigan's waters were choppy with whitecaps. Motorists drove cautiously along snowy and slushy roads. Snow-covered roads and slow travel were reported across Iowa and northern Illinois and Indiana.

Chicago is under a winter storm warning. Heavy snow forecasted to impact travel. Significant snowfall rates are anticipated this afternoon and evening, leading to hazardous conditions.

Winter weather watches and warnings are in effect on Saturday morning after a winter storm moved into Chicagoland overnight, and the snow is causing some major disruptions for travelers looking to get home after the Thanksgiving holiday.

More than 100 flights were cancelled and over 785 were delayed out of Chicago O'Hare International Airport Saturday morning, according to Flightaware.com. The National Weather Service (NWS) issued multiple advisories for the Chicago region, including a winter storm warning, gale warning, and hazardous weather outlook.

Travelers returning from the holiday weekend are urged to use caution when driving in hazardous conditions. Snow is expected to begin Friday night and intensify Saturday morning, forecasters say. Temps could drop into the single digits Sunday and Monday nights.

Chicago's winter overnight parking ban takes effect next week. Starting on Monday, Dec. 1, through April 1, the parking ban will be enforced regardless of snow.