A Winter Storm Warning is in effect for areas of Northern Arizona above 65-hundred feet until 5 p.m. The National Weather Service says to expect heavy snow, with additional accumulations up to 16 inches above 85-hundred feet. Forecasters say Flagstaff could see four-to-six inches of snow, with Doney Park and Williams seeing two-to-four inches of snow by 5 p.m. Wednesday. Periods of heaviest snow is expected this morning. Travel could be very difficult to impossible, with blowing snow that could significantly reduce visibility.