* WHAT...Heavy snow. Additional snow accumulations 10 to 18 inches. Winds gusting as high as 45 mph producing areas of blowing snow. * WHERE...The Eastern Lake Ontario Region. * WHEN...Until 2 PM EDT Saturday. * IMPACTS...Travel will be very difficult. The hazardous conditions will impact the Friday evening commute. Gusty winds will down tree branches and cause isolated power outages. * ADDITIONAL DETAILS...The greatest accumulations are expected across the Tug Hill Plateau. Significantly lower accumulations are expected across the surrounding lower elevations, with 3 to 5 inches of total snowfall expected in areas such as Watertown and Oswego.