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It’s here, Chicago.

By Thursday evening, 1 to 2 inches of snow had accumulated across the Chicago area, said meteorologist Jake Peter from the National Weather Service of Chicago. At O’Hare International Airport, 1.1 inches had been recorded while 1.5 inches were reported closer downtown. Wind chills were expected to drop to negative 35 degrees.

Airlines canceled dozens of flights scheduled for Friday out of the two Chicago airports. By late afternoon Thursday, 544 flights scheduled for Thursday had been canceled at O’Hare and 255 had been canceled at Midway, according to the website FlightAware.

Here’s what you need to know about the weather, a white Christmas, past cold snaps and more.

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Thursday brought the first major winter blast of the season, a storm that crawled across the middle of the country, disrupting travel, upending holiday planning and shuttering much-loved holiday attractions including the city’s Christkindlmarket.

Although forecasters had called for temperatures to plummet throughout the day into the single digits — a 20 to 30 degree drop from morning — no storm proved too daunting for some hearty Chicagoans, who proceeded with business as usual on Thursday, as some were spotted jogging along Michigan Avenue or taking strolls with their families.

Latest list of travel delays and closures around the city

What is a polar vortex? How often does the weather phenomenon happen here? Experts explain.

As possible blizzardlike conditions barrel toward Chicago, advocates for homeless work to provide shelter, save lives

Brrrrrr down

Bears fans Scotty Williams (left) and Jordan Frahm at Soldier Field on Dec. 18, 2016, for a Bears-Packers game.
Bears fans Scotty Williams (left) and Jordan Frahm at Soldier Field on Dec. 18, 2016, for a Bears-Packers game.

There’s cold, and then there’s Soldier Field-in-late-December cold. Bear weather, they call it.

For those unfamiliar with the phrase, many — including iconic coach Mike Ditka — believe the wintry conditions put Bears opponents at a disadvantage.

The point spread — the Bills are favored by 91/2 — figures to be higher than the temperature on the lakefront, which is forecast to be 8 degrees at kickoff (noon, CBS-2) with a windchill of minus-14.

A look at the coldest Bears games at Soldier Field

What to wear to Saturday’s frigid Bears game (and don’t forget the ChapStick!)

Wind and cold add another challenge for Bears kicker Cairo Santos amid a string of misses: ‘Like you’re kicking a rock’

A white Christmas?

Chicago Theatre and Christmas lights galore at State Street on Dec. 8, 2022.
Chicago Theatre and Christmas lights galore at State Street on Dec. 8, 2022.

Remember 2021? It was 55 degrees on Christmas that year — but Chicago has experienced warmer temps on the holiday.

O’Hare International Airport, the city’s official recording site, reported a high of 57 on Dec. 25, 2019, making it the second warmest Christmas in the area. Yet neither were as balmy as the high of 64 on Dec. 25, 1982 — the warmest Christmas recorded here since 1871.

The following year, however, Chicago experienced the low temperature of minus 17 degrees — the city’s coldest Christmas.

Read about Chicago’s warmest — and coldest — Christmas holidays since 1871.

Will Chicago see a white Christmas this year? Here’s what more than 150 years of weather data predict.

New Year’s Day in Chicago: The warmest, coldest, snowiest and wettest weather since 1872

‘You really have to be a little crazy to go out in this type of cold’

Dozens of runners brave the cold weather in Chicago to take part in the inaugural 10k Polar Dash run along the lake shore. The runners started in Grant Park, headed south down Lake Michigan's shoreline and returned to Grant Park.
Dozens of runners brave the cold weather in Chicago to take part in the inaugural 10k Polar Dash run along the lake shore. The runners started in Grant Park, headed south down Lake Michigan’s shoreline and returned to Grant Park.

While the record for cold temperatures in Chicago took place Jan. 20, 1985, many of the city’s lowest recorded temperatures came from arctic snaps in 1872 and 1899.

The 1980s and 1990s saw frigid temperatures among the city’s coldest recorded, however only three days at or colder than 16 below — Jan. 6, 2014 and in two in January 2019 — took place after the year 2000.

Read the full breakdown here.

Polar vortex produced Illinois’ coldest temperature ever, weather officials determine

The polar vortex separates the real Chicagoans from the wannabes

Why the polar vortex gripped Chicago in 2019 — and why you may see more of it

‘Stranded in a biting snowstorm, you find yourself doing things you never imagined’

Chicago’s 10 largest blizzards come with deep drifts of uniquely Chicago stories. A mayor voted out for mishandling stranded vehicles. A populace demanding a subway to compensate for stuck trains. Prisoners making a break from county jail. Runaway steers that escaped a crashed truck.

Read all about Chicago’s 10 latest snowfalls since 1886 here.

When Chicago received its first snow of the fall season, going back more than 135 years

10 years ago, it was ‘Snowmageddon’: ‘Do you understand what’s going on Lake Shore Drive right now?’

Ready for Plowy McPlowface? Chicago launches its first snowplow-naming contest for city residents

From the archives: The blizzard of ’67

In other news …

With temperatures in the single digits train crews ignite burners along the switches for tracks used by Amtrak trains near Western and Grand Avenues on the morning of Nov. 12, 2019.
With temperatures in the single digits train crews ignite burners along the switches for tracks used by Amtrak trains near Western and Grand Avenues on the morning of Nov. 12, 2019.

You were thinking it too, so we’re here to help.

Yes, fire is used to keep Chicago trains running in the cold

What’s that smoke above Lake Michigan? It’s arctic sea fog.

Can your dog handle the extreme cold? Just remember: ‘If you’re cold, they’re cold’

Cold enough to freeze-fry an egg? This and other wacky experiments while you hibernate.