A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

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 ...

Understanding the Polar Vortex The polar vortex is like a massive whirlpool of frigid air moving around our planet's poles. Think of it as a barrier that, when strong, keeps icy polar air trapped up ...

The vortex is essentially an area of low pressure in the upper layers of the atmosphere over the polar region up north. This ...

Imagine it as a giant, icy whirlpool far above the Earth, keeping frigid Arctic air contained near the pole. But here’s where things get interesting: the polar vortex’s behavior is closely ...

A blast of arctic air from Canada has brought the season's coldest weather to most of the United States. The system, known as a polar vortex, is forecast to bring subzero temperatures to the ...

As we continue to warm moving into February, it appears latest trends suggest a classic "what goes up, must come down" type ...

Punxsutawney Phil, the legendary weather-forecasting groundhog from Punxsutawney, PA, saw his shadow Sunday morning, thus ...

Sometimes, lobes of the polar vortex can separate and get stuck well to the south. Multiple studies have strengthened scientists’ understanding of the phenomena as a consequence of Arctic ...

With that idea there would be a warm push from the south. The warm push would hold the polar vortex in check and keep the true Arctic air even farther north. We still have plenty of winter weather ...

In the winter, the polar vortex helps keep frigid, Arctic air trapped in the Arctic Circle within the vortex. It acts as a barrier between the midlatitudes and the poles. However, at times the ...