As more Arctic air masses flow into the WOWK-TV region, you have undoubtedly heard the term “Polar Vortex” brought up in the conversation. But what is it? Definition: The polar vortex is a flow of wind aloft that is always present above the cold,

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

The United States continued to freeze through a polar vortex that brought rare cold to the southern United States and chances of freezing weather through much of the country.

In Kentucky’s biggest city ... It’s like an ice skating rink out there in the fields.” The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges ...

In Kentucky’s biggest city ... to scrape off his vehicle as an excuse to spend time in the snow. The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes escapes ...

Much of the United States has been buried in a deep freeze. And Kentucky faces the brunt of a polar vortex that continues to pour down through the middle of the country. Thankfully, Louisville Gas and Electric Company and Kentucky Utilities Company are ...

The polar vortex of ultra-cold air usually spins around ... according to forecasters. A Kentucky truck stop was jammed Monday with big rigs that had been forced off of snow-covered Interstate ...

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says. That includes Kansas City, which is set to host a Chiefs playoffs game this weekend.

Here is what is and isn't a polar vortex when Colorado receives cold like what is forecast for the holiday weekend.

Dozens of US states will endure the lowest temperatures they have felt in years next week as a polar vortex brings 'life-threatening' cold. Here's how you can stay safe in these harsh conditions.

Stable polar vortex: When the stratosphere over the Arctic is cold, it's considered stable. The wind around the polar vortex is tight, essentially hugging the cold air nice and tight.