...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING TO NOON EST FRIDAY... * WHAT...Very cold wind chills expected. The cold wind chills will cause frostbite in as little as 30 minutes to exposed skin. Expect wind chills to range from 0 to 15 below zero. * WHERE...Northern Maryland, the northern and central Shenandoah Valley, and eastern West Virginia. * WHEN...From 10 PM this evening to noon EST Friday. 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. By the National Weather Service, Sterling, Va.