...Very Cold Tonight and Early Tuesday... ...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 10 AM CST TUESDAY... ...Very cold wind chills expected. Expect wind chills to range from 0 to 15 below zero. ...Portions of central, northern, northwest and western Oklahoma. ...Until 10 AM CST Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Advisory means that cold air and the wind will combine to create low wind chills. Frost bite and hypothermia can occur if precautions are not taken. Make sure you wear a hat and gloves.