There’s a chance of snow this weekend before temperatures are expected to drop to the single digits next week due to a blast of arctic air.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its frigid grip, making many roads treacherous,

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need to know.