A series of winter storms are making their way toward Northern Arizona. The National Weather Service says the first system arrives Friday with showers and some snow, but there’s another storm right behind it. During that storm, we could see snow levels fall to about 45-hundred feet with four-to-eight inches of snow above 7,000-feet. Three-to-five inches of snow is expected in Flagstaff. By Sunday the storm could pose some problems on area highways. If you have to drive this weekend, slow down and use caution. The storm is expected to exit the area late Sunday.