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

Strength: The polar vortex strengthens in winter due to the deeper contrast between polar and equatorial temperatures and weakens in summer as temperature differences diminish. Normal Position ...

Ranked dead last, or perhaps not mentioned at all, would probably be the only state that sits partly within the Arctic Circle ...

Recent forecasts suggest some Americans might be getting a much-needed break from the freezing temperatures that have gripped ...

Much of the U.S. is being blasted by ice, snow and wind, as the polar vortex that dipped south over the weekend is ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

The big winter weather challenge has now come and gone in the form of last week’s polar vortex. The Eastern railroads got ...

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this ...

A mass of air called the polar vortex has escaped the Arctic and plunged southward. Some scientists see the fingerprints of ...

Polar Vortex Keeps Much of the US in Its Icy Grip ... flew at half-staff in memory of former President Jimmy Carter. In Kentucky’s biggest city, Louisville, Hugh Ross used his shovel Monday ...