Cold Weather Advisory issued January 20 at 12:30PM CST until January 21 at 12:00PM CST by NWS St Louis MO

* WHAT...Very cold wind chills as low as 15 below zero expected. * WHERE...In Illinois, Saint Clair IL County. In Missouri, Saint Louis City MO and Saint Louis MO Counties. * WHEN...From midnight tonight to noon CST Tuesday. * IMPACTS...The dangerously cold wind chills as low as 15 below zero could result in hypothermia or frostbite if precautions are not taken.