It’s not over yet. After a powerful winter storm gripped much of the eastern United States, another blast of Arctic air is expected to freeze half of the country later this week. States from Arkansas to Maine could see record lows while Florida is expected to drop into the low 30s. Chicago’s forecast includes temperatures as low as -6 degrees while Nashville could fall to slightly below zero. Many regions, including the South, could see snow and ice along with the freezing temperatures.