A wind chill advisory went into effect at 9 p.m. Sunday and runs through noon Monday as a polar air mass blows through northern Illinois, sending wind-chill values to 30 below zero.
The coldest wind chills will hit the Chicago area at 6 a.m. Monday. Skin exposed to the cold air can become frostbitten within 30 minutes, the National Weather Service advises. Over the next day, there is a significant danger of hypothermia, and people are advised to wear gloves and hats.
Or a bear hide if you happen to have one lying around. You might also try growing a thick beard in the next 12 hours.
This guy looks warm:
A Look Ahead
Monday: Sunny and cold, with a high near 10. Wind chill values as low as -24. West wind around 15 mph, with gusts as high as 25 mph.
Monday Night: Mostly clear, with a low around 4. Wind chill values as low as -13. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday: Mostly sunny, with a high near 20. Wind chill values as low as -11. West wind 5 to 10 mph becoming south in the afternoon.
Tuesday Night: A 50 percent chance of snow after midnight. Mostly cloudy, with a low around 17. South wind 5 to 10 mph.
Wednesday: A chance of snow before noon, then a slight chance of snow showers after noon. Mostly cloudy, with a high near 28. Chance of precipitation is 30%.
Wednesday Night: Mostly cloudy, with a low around 21.
