If you haven’t yet, you may want to unpack those winter jackets, hats, and mittens because a blast of arctic air is headed to the U.S. Meteorologists say we could be in for record low temperatures in the Midwest and Northeast through the middle of next week.

To sum it up, about two-thirds of the country will likely experience unseasonably cold temperatures where the cold wave could mean the thermometer will read 20-30 degrees below average.