At a Glance

Chicago had its snowiest late April day since 1961.More than 850 flights were canceled at O'Hare International. Thundersnow is reported in the south part of the city.A baseball game between the Angels and the Cubs at Wrigley Field was postponed.

A steady snow fell on the Chicago area most of Sunday accompanied by high winds and poor visibility leading to the cancellation of nearly 1,000 flights at Chicago airports.

More than were canceled at O'Hare International as of 3:30 p.m. CT, according to flightaware.com. Another 144 were canceled at Midway. Flights were at O'Hare and 45 minutes at Midway, according to WMAQ.

Traffic slowly moves on the street during a snowy day, Sunday, April 14, 2019, in Chicago.

(AP Photo/Nam Y. Huh)

Winds gusted up to 30 and 40 mph at O'Hare and visibility was less than a mile at times.

As of 4:30 p.m. CT Sunday, 4.8 inches of snow had fallen at Chicago's O'Hare airport, according to the National Weather Service, the snowiest late-April day since April 16, 1961, when 5.4 inches of snow fell.

Top late April snow days for Chicago.

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National Weather Service meteorologist Todd Kluber told the Chicago Tribune there were at Midway and across the south half of the city. is a snowstorm event in which thunder and lightning occur.

More than were without electricity Sunday afternoon, according to poweroutage.us.

The final game in a three-game series between the Los Angeles Angels and Chicago Cubs at Wrigley Field had to be postponed because of the snow. No makeup date had been announced.

The Illinois State Police reported that it had on Chicago area interstates because of the snow in about seven hours Sunday, according to WBBM-TV.

Many people on social media linked the snowfall to the Sunday night premiere of the final season of the HBO show, "Game of Thrones."