as some other parts of the country that already received an arctic blast this week prepared to go another round with the plunging polar vortex. Arkansas' capital, Little Rock, closed schools on ...

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into ...

things get a little chaotic. A weaker jet stream becomes wavy and unstable, like a loose rope in the wind. This instability allows cold Arctic air from the polar vortex to spill southward into ...

But during the winter, it is joined by a second atmospheric phenomenon dubbed the polar vortex. This swirl of frigid air, located more than 10 miles above Earth’s surface, strengthens each year ...

These outbreaks can happen when the polar vortex is in a weaker state, allowing cold air that is normally confined to the north to break off and move further south. Some experts say this is ...

A lobe of the polar vortex, a stormy ring that typically keeps ... Faster movement will cause the storm to form farther offshore and cause little impact, while slower movement will cause the ...

The polar vortex is responsible for next week’s cold, which will bring extreme cold as far as the deep south. The cold air will hang around Monday, Tuesday and Wednesday, bringing below-zero ...

Answers as to why these strange temperatures and weather events are prevalent may be found in the polar vortex. The polar vortex is a large area of low pressure and cold air surrounding both of ...

What’s shaping up to be the most expansive polar vortex in over a decade is about to plunge much of North America, including nearly all of Canada, into the coldest temperatures the country has ...