A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the polar regions—here’s how it works

A mass of cold air from the Arctic – known as a polar vortex - is what’s chilling Quebec, including Montreal, until Wednesday.

In Indiana, around zero degrees was likely, the map showed, with temperatures of around three degrees possible in Northern Maine. Northern Georgia would see temperatures around 16, and in Colorado, the map showed that some areas would see -9.

Arctic air has brought chilling temperatures as low as 12 degrees in New York City on Monday night but are we in a polar vortex? A polar vortex settled its way over New York City and New Jersey following Sunday’s snow storm,

Meteorologist Travis Clark-Smith dives into what caused our recent cold snap.

Most of the USA is currently freezing. Since the weekend, a polar cold front has swept across the country, reaching as far as the Gulf of Mexico. This intense cold won't have the same impact on Europe,

This blast of frozen temperatures is tied to a polar vortex... but what is that? Air spins around the notoriously cold North and South Poles. When the air is spinning fast, it's stable, but when it is weakest,