(NEW YORK) — Freezing temperatures are hitting millions in the Midwest and Northeast on Thursday and Friday, bringing a brutal cold usually seen in January, not early December.

On Thursday morning, the wind chill — what the temperature feels like — plunged to minus 14 degrees in Minneapolis; minus 17 in Green Bay, Wisconsin; and minus 5 in Chicago.

When wind chills reach minus 20 degrees, frost bite can form on exposed skin within 30 minutes.

Daily record lows were broken Thursday morning, including in Waterloo, Iowa, which hit minus 10 degrees, and Aberdeen, South Dakota, which hit minus 18.

By Friday morning, the cold moves further east. Morning temperatures are forecast to hit 3 degrees in Chicago, 8 in Detroit, 12 in Pittsburgh and 21 in New York City. By Friday afternoon, wind chi

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