Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

The polar jet stream, which is affected by the polar vortex above it, has become quite wavy, allowing Arctic air to ...

Here’s the wind chill chart. Notice the four shadings, indicating how long it will take for frostbite. When we get to wind ...

Cold temperatures are expected to last through the end of the month — and forecasters say that there's a potential for snow ...

In the coming weeks, cold air will continue for parts of the U.S. thanks to the influence of the polar vortex.

A significant portion of the U.S. is experiencing below-average temperatures due to a disrupted polar vortex, affecting over ...

A major polar vortex is about to hit the US and could bring weeks of frigid temperatures for millions, with even a chance of ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S.

A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...

NORFOLK, Va. — Have you ever wondered why some winters are mild while others bring freezing temperatures and snowstorms? One of the key players in these dramatic shifts is something called the polar ...

And it won’t just feel cold: A series of clipper storms is also expected to bring snow to the region beginning on the evening ...