The intense cold snap about to settle over most of Canada and the U.S. has been dubbed a “polar vortex’, but Environment Canada Senior Climatologist David Phillips says it could just as easily be called “Arctic air or Siberian air.”

The plunging polar vortex brought subfreezing temperatures ... along Texas’ border with Mexico, to 31 degrees, with an expected wind chill factor ranging from 0 to 15 degrees early Wednesday ...

(AP) — The plunging polar vortex brought subfreezing temperatures ... along Texas' border with Mexico, to 31 degrees (minus 0.5 Celsius), with an expected wind chill factor ranging from 0 ...

A lobe of the polar vortex, a stormy ring that typically keeps ... moist air of the Gulf of Mexico and the western Atlantic Ocean. After a slow start to the snow season in December, parts of ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen in years.

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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.

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to nearly 300 million Americans starting this weekend. Maps show where and when the cold front will arrive.

As they describe it, the polar vortex circles the north pole counterclockwise. the polar jet stream circles at a lower level of the atmosphere, which usually keeps Arctic air corralled in the middle.

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this weekend and next week.

Parts of Mississippi can expect snow, below-freezing temperatures, lows in the teens next week. Know how to prep your home, family, pets for the cold.