...COLD WEATHER ADVISORY NOW IN EFFECT UNTIL 7 AM EST MONDAY... * WHAT...Very cold wind chills between 10 and 20 below zero. * WHERE...In Maryland, Extreme Western Allegany County. In Virginia, Central Virginia Blue Ridge and Northern Virginia Blue Ridge, and Eastern Highland County. In West Virginia, Eastern Pendleton and Western Mineral Counties. * WHEN...Until 7 AM EST Monday. * IMPACTS...The cold wind chills approaching 20 below zero could cause hypothermia and frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. &&