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

A rush of Arctic air will plunge parts of North America into bitter cold this weekend, bringing heavy snow, strong winds and frigid temperatures to parts of Canada. Meteorologists say temperatures ...

After a strong cold front comes through this Saturday, we could see temperatures 20 degrees colder than normal. Why is that, ...

Arctic sea ice can also reflect sunlight back into the atmosphere. If the temperature between the equator and the North Pole ...

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

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 ...

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 ...

But what is a polar vortex? The polar vortex is the jet stream above the Arctic Circle. It is very cold. Most of the time it stays up there, but there are circumstances where it can dip down into ...