A polar vortex is a mass of cold air that normally stays contained over the Arctic. The cold blast is predicted to be ...

Meteorologists sound the alarm as frigid temperatures are expected to sweep across the U.S. South this weekend.

Arctic air is set to sweep across the country this weekend, dropping temperatures below zero in parts of the upper Midwest ...

A fresh shot of Arctic air could bring the coldest air of the season for many this week, according to AccuWeather ...

A polar vcortex and an arctic blast can each bring frigid air to the greater Philadelphia region, but there are differences between the two to know.

At the tail end of a mild weekend in south Louisiana, an Arctic blast hitting the eastern U.S. will bring freezing ...

Several states across the Northeast and into the Midwest are expected to experience unseasonably cold temperatures this ...