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

The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the ...

A rush of Arctic air will plunge parts of North America into bitter cold this weekend, bringing heavy snow, strong winds and ...

An Arctic blast that began in the northern plains on Saturday spread bitter cold from the Rockies through the East Coast and ...

Nearly all of Michigan received an extreme cold warning yesterday. A surge of arctic air known as the polar vortex is the cause behind this abnormally cold weather. According to the National Weather ...

all that icy air stays tightly locked around the arctic, keeping the freezing temperatures up north. But just like when a top starts to slow down and wobble, the polar vortex can sometimes get out ...

Millions of people across the U.S. will experience subzero or below-average temperatures in the coming days as a polar vortex coming ... A new blast of Arctic air sweeping from the north to ...

Stable polar vortex: When the stratosphere over the Arctic is cold, it's considered stable. The wind around the polar vortex ...

When this stratospheric vortex becomes disrupted or stretched, it can distort the jet stream as well, pushing it southward in some areas and causing cold air outbreaks. The Arctic polar vortex is ...

The polar vortex will bring Arctic air directly from Siberia, giving approximately 300 million Americans a taste of the tundra. The cold blast will send at least 20 states from the Plains to the ...

This setup is driving the East Pacific Oscillation ... However, as the polar vortex stretches in the coming week, it will ...