A polar vortex is bringing another round of frigid, Arctic air to the Eastern United States. Temperatures across Tennessee are expected to drop into the low 20s and upper teens over the weekend. There ...

The polar vortex has broken, and severe temperatures are set to dominate most of the country in the coming days. Temperatures in the 10s are forecast for much of the Northeast, and subzero ...

A polar vortex system is expected to bring two or more cold waves to Florida this week. Temperatures in North Florida could drop into the upper 20s, with a chance of frost or freeze. Central and South ...

The wall that keeps cold air contained in the Arctic is called the polar vortex. There's been a "displacement" in the polar vortex, which allows Arctic air to escape to the south. An "arctic frontal ...

Cold, Arctic air is severe. Fortunately, year-round, that air is usually kept tightly contained in the North Pole. Arctic wind patterns create a sort of wall around the pole that prevents frigid air ...