Chicago weather forecast: Extreme Cold Warning Friday as dangerous polar plunge nears

 CHICAGO (WLS) -- The Chicago area will be under an Extreme Cold Warning on Friday. Local officials are warning residents to be ready for the brutal cold.

The warning was upgraded from a previous Extreme Cold Watch; it will go into effect from 3 a.m. until noon Friday for the Chicago area.

ABC7 meteorologists said that although the warning expires at noon on Friday, it will be dangerously cold all day.

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For Thursday, gusty winds are in the forecast with a high of 20, by midnight the area will be at 5 degrees.

By Friday morning, we will wake up to -7 degrees; wind chills could be as low as -30 to -40 through the day.

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