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 ...

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

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

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

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

Severe winter chill is expected to plunge central and eastern states into below average temperatures as the polar vortex ...

Colder air is returning to the central and eastern U.S. as the polar vortex becomes more active, bringing fluctuating ...

Each of these lobes of the Polar Vortex will bring two or three days of bitterly cold, below-normal temperatures. We aren’t ...

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

The polar vortex is bringing bitter cold and snow to NJ this weekend. Here's the weather forecast, from timing to how much ...

Moreover, the latest data suggests that the Polar Vortex is on the verge of a significant disruption due to a new SSW event. The disruption is expected to lead to a colder pattern across the United ...