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The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

The polar vortex is a large area of low pressure, winds, and cold air surrounding both of the Earth’s poles, according to the ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

Monday’s presidential inauguration promises to be one of the coldest on record, prompting US officials to move the ceremony indoors to the Capitol Rotunda. | Photo Credit: AL DRAGO Massive ...

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles. The "vortex" is the ...