National Weather Service say it will be in affect from 6:00 AM until 3:00 PM.
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 3 PM EST SATURDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 5 inches. Northwest winds will gust around 45 to 55 mph. * WHERE...Portions of central, north central and northern Maryland and northern and northwest Virginia. * WHEN...From 6 AM to 3 PM EST Saturday. Rain will change to snow between 5 and 7 AM early Saturday morning. The steadiest snow will be through midday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Visibility may be reduced to below one- quarter mile at times. Brief near blizzard conditions are possible between 8 and 11 AM. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. When venturing outside, watch your first few steps taken on steps, sidewalks, and driveways, which could be icy and slippery, increasing your risk of a fall and injury. &&
By The National Weather Service, Sterling, Va.