Region could receive three to six inches of snow.
...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 AM EST SATURDAY... * WHAT...Heavy snow expected. Total snow accumulations of 3 to 6 inches. The highest totals are most likely under heavier snow bands and for elevations above 1000 feet where isolated totals to 8 inches are possible. * WHERE...In Maryland, Frederick MD County. In Virginia, Western Loudoun County. * WHEN...From 11 PM this evening to 5 AM EST Saturday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snowfall rates of 1 to 2 inches per hour are possible for a few hours under the heaviest snow bands. Visibility may be reduced to less than one half mile at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. 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.