A blast of polar vortex cold air is expected to hit parts of the country around Thanksgiving. What to expect in Tennessee.

Forecasters are expecting a weakened polar vortex to bring cold air after Thanksgiving. An uncommon occurrence at this time ...

In a new outlook from the National Weather Service, the Chicago area appears to be in for a potentially "active" start to ...

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid ...

A rare weather phenomenon that hasn't occurred since 1968 could soon impact the U.S., plummeting temperatures nationwide.

But across the country, AccuWeather meteorologists are predicting major travel disruptions as a storm system is set to batter ...

The cold temperatures — which might not reach Long Island — would be caused by a disruption in the polar vortex above the ...

New York City could see its first snow of the season on Tuesday as a powerful polar vortex sweeps across the eastern half of ...

NBC 5 Storm Team Meteorologist Kevin Jeanes took a look at what’s going on and what the weather may look like going into ...

The National Weather Service's Climate Prediction Center says a La Niña event could affect winter in Indiana, and the polar ...

The polar vortex is an area of low pressure, a wide expanse of swirling cold air that is parked in polar regions, according ...