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Effective: 2023-02-02 23:00:00 CST Expires: 2023-02-03 10:00:00 CST Urgency: Expected Severity: Minor Certainty: Likely Instruction: Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Target Area: Boone; Central Cook; De Kalb; DuPage; Eastern Will; Grundy; Kane; Kendall; La Salle; Lake; Lee; Livingston; McHenry; Northern Cook; Northern Will; Ogle; Southern Cook; Southern Will; Winnebago WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST FRIDAY * WHAT...Very cold wind chills expected. Wind chills as low as 20 below zero. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...Until 10 AM CST Friday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes.