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

A significant meteorological event is poised to impact vast regions of the United States. The polar vortex, a large area of low pressure and cold air surrounding the Earth’s poles, is expected to ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

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

If someone asked you, “Where can I go in the United States to escape the frigid air this January?” what would you say?

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

A lobe of the polar vortex swirls into the United States. (Video: Ben Noll/The Washington Post) Even if these disruptions in the vortex are not causing cold outbreaks to become more frequent or ...

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allowing for the vortex to move more drastically, and potentially sending colder air into Asia, Europe, or the United States. As for if the polar vortex is to blame for last week's Gulf Coast ...

Daughter polar vortices' could bring snow and ice to parts of northern, central, and eastern United States later this month, ...

Elsewhere, a displaced lobe of the polar vortex has brought an unrelenting chill to large parts of the contiguous United States. About 30 states have experienced temperatures well below average ...