A topsy-turvy weather week continues into the weekend, according to the National Weather Service. Following a burst of arctic air Thursday, a round of warmer air is back today, only to be followed with snow. Accumulations locally could vary from a trace up to four inches, depending on the final track of the system. Blowing snow is expected to make travel difficult Saturday regardless. Following the snow, a long stretch of much colder air is expected, with wind chills expected to stay below zero through most of the week.