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 ...

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 ...

Arctic air has brought chilling temperatures as low as 12 degrees to New York City — but are we in a polar vortex? A polar ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar ...

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

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

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

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

Minot residents have been experiencing temperature whiplash with relatively warm temperatures dropping precipitously below ...

On Sunday, a tongue of cold air from northwest Canada slid into the United States, putting Charleston in the midst of a polar ...

A powerful pattern is setting the stage for an amplified jet stream that will shunt cold air south, and the roots of this ...