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© Sascha Hedjbeli
Windy conditions and snow have caused hundreds of flight cancellations and delays Friday at O'Hare International Airport, officials said.

As of 11 a.m., more than 300 flights were reported canceled and delays of up to an hour were reported at O'Hare, according to the Chicago Department of Aviation.

According to to FlightStats, an online site that monitors air traffic, 304 flights in and out of O"Hare had been canceled.

Halloween started with a record snowfall for many Chicago-area residents. As of 8 a.m. Friday, O'Hare and Chicago Rockford Airport had one-tenth of an inch of snow, the most snow on record for Oct. 31 for the city of Chicago, according to the National Weather Service.

Scattered snow showers are expected throughout Friday morning, said Gino Izzi, a meteorologist with the National Weather Service.

"It's just scattered showers, but it could come down decently, briefly," Izzi said. "I doubt anything will stick though."

Precipitation should end later Friday morning for the Chicago metropolitan area, but a high wind warning will be in effect until 6 p.m., with wind gusts expected to reach 60 mph near the lake.

Parents will want to bundle up their kids for trick-or-treating Friday afternoon and evening when temperatures dip down to the mid-30s with wind chills reaching the 20s.

Northwest Indiana and far southeast suburbs should expect some lake-effect snow Friday evening, and the rest of the Chicagoland area could see some precipitation, the weather service said.

Saturday will be less windy but still chilly, Izzi said, and there is a chance the area will see rain or snow showers in the morning near the lake.

Tightrope walker Nik Wallenda will be happy to hear Sunday's forecast calls for sunny or partly cloudy weather. Winds of 10 to 15 mph are expected, Izzi said.