Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.

WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY... ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 9 AM CST WEDNESDAY... * WHAT...For the Wind Chill Warning, dangerously cold wind chills. Wind chills as low as 25 to 35 below zero. For the Wind Chill Advisory, very cold wind chills expected. Wind chills as low as 15 to 25 below zero. Lowest wind chills will be at night and during the morning. * WHERE...Portions of central, north central and northeast Illinois. * WHEN...For the Wind Chill Warning, until noon CST today. For the Wind Chill Advisory, from noon today to 9 AM CST Wednesday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes.