A Winter Weather Advisory is in effect for the entire Chicago area until midnight.
ABC7 AccuWeather Meteorologists Tracy Butler and Larry Mowry said light snow moved into the area early Monday afternoon.
Much of the Chicago area saw showers by 4 p.m., and an additional 1 to 3 inches of accumulation is expected for most of the area. A few 4-inch totals will be possible for areas south of Kankakee.
The Illinois Department of Transportation website says some area roads, and even expressways, especially in the suburbs, are partially covered in snow on Monday night.
Authorities respond to crashes, spinouts amid icy conditions
The National Weather Service says the snow on Monday evening was expected to immediately stick to untreated roads, leading to hazardous conditions, reduced visibility and as a result, very slow driving.
"It's congested but then starting to get a little slick because it getting darker out, and the visibility is going down," said driver Timothy Dalton.
A school bus hit a utility pole and ended up in a ditch in unincorporated McHenry on Monday afternoon. The driver and two young children on board were luckily unhurt.
Slick roads also caused issues on Monday morning in Addison.
Icy conditions were reported on I-355, with multiple cars involved in crashes and spinouts Monday morning.
Drivers cautiously brave busy, slick roads
Meanwhile, the snow caused travel times on local expressways to balloon to an hour of more during the evening rush.
"They're starting to get slippery. They're not too bad right now, but you're starting to feel your wheels slip a little," said driver Candace Dalton.
ABC7 spoke to several drivers at the Lincoln Oasis in South Holland, including some who were completing their trips home after Thanksgiving.
"As you could see, flurries. Roads are very hard to see. Maybe one, two lanes you could see, just following traffic and just following tire tracks basically right now," said driver Derrick Justice. "Keep cautious because there's guys spinning out. You could tell the guys that are going too fast."
They say it is deceptively slippery.
"So far it's kind of slow, cautious driving. I mean, slow driving, slippery ways, so you have to be very careful," said driver Gus Jano.
"It's a little, a little slick. Everybody's slowing down. So, we'll see what happens later," said driver Armando Ruiz.
Earlier Monday, ABC7 talked to plenty of travelers trying to beat the evening travel rush.
"The roads are excellent right now. They've taken great care of removing the snow and making it safe for us," said driver Ruth Bamonti, who lives in Flossmoor.
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Travelers were taking advantage of a small window of clear weather on Monday afternoon, before the weather advisory went into effect.
"We were going to come back yesterday, but we stayed an extra day because of the snow, and I'm looking this morning, I said, 'Well, if we get out now, we can be ahead of it all the way,'" said Kevin Duncan, who was driving to New York.
"We've had no problems so far. Tomorrow may be different, because we're supposed to head into snow in New York, so we'll see," said Mary Duncan.
"Well, we're planning to not be here in a few hours. But other than that, we got coats and gloves and all that, so hopefully we got enough gas, and if we get stuck, we can keep warm," said Dennis Hartzler, who was driving to Michigan.
Even the expressways leading to Chicago O'Hare International Airport have been backed up on Monday as people became tied up while trying to get to their terminal.
More delays at O'Hare after weekend flight cancellations
Chicago airports recovering after weekend winter storm cancels flights
There is a ground delay alert for O'Hare due to snow or ice from 4 p.m. to 10:59 p.m., the Federal Aviation Administration says. Delays are expected to average 82 minutes during that time frame.
As of 9:09 p.m. Monday, there have been 312 cancellations at O'Hare and three at Chicago Midway International Airport, according to the city's FlyChicago website.
At the same time, delays were averaging 48 minutes at O'Hare and 28 minutes at Midway.
The rush at the airports is continuing Monday as travelers try to make their way home.
"We're supposed to fly out this morning, head to Seattle and then on to Japan. But it's just been a little bit mental," Ethan Buchanan, who is flying to Japan, said.
It has been pretty "mental" for hundreds of airport travelers trying to get home.
"It was delayed about eight-and-a-half hours, and then we were gonna miss our connecting flight, so we got switched on to a different one, which leaves in about four-and-a-half hours. So we're just gonna sit around for a while," Buchanan said.
It's been a waiting or take a nap game for so many looking to leave Chicago after the Thanksgiving holiday.
TSA says Sunday was one of the busiest travel day on the record for the agency with over three million individuals passing through the security checkpoints nationwide.
"I'm trying to leave since Saturday, but all flights were canceled," Patricia Quintl, who is traveling to Cancun, said.
Those like Patricia said they were trying to fly back to Cancun from Green Bay but had to find a flight out of O'Hare instead, only to face cancellations again.
"We live, like, three hours from Cancun, but we are flying to Cancun because that's what we found," Quintl said.
Over the weekend, more than 1,300 flights were canceled between O'Hare and Midway airports.
For one Michigan family headed to Disney World, the kids say they're just trying to enjoy every step.
"We just had a snowstorm on Wednesday, and we got to miss school, which was good, but it's also kind of dope, because it was only a half day, but it was pretty good," Mayona Maggio said.
And so are others.
"We went out and had a little snowball fight, snowboarding and stuff, and just like, went for a walk around town, which was kind of cool," Buchanan said.
What's next
The latest snow on Monday afternoon comes after a winter storm dump several inches of snow across the area.
O'Hare saw 8.4 inches of snow on Saturday, making it the snowiest November day in Chicago's recorded history, according to the NWS.
More light snow is possible Wednesday afternoon and over the upcoming weekend.
But no more big snows like the weekend's storm are in the forecast for this week. Instead, it is expected to be very cold with temperatures remaining mostly below freezing through the rest of this week. Thursday will be the coldest day with high temperatures only in the teens.