Meteorologists Blame a Stretched Polar Vortex, Moisture, Lack of Sea Ice for Dangerous Winter Blast

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States ...
The Weather Network on MSN

What is the polar vortex? How it’s responsible for dangerous cold

What is the polar vortex? It’s a wintertime mainstay capable of flooding Canada with some of the world’s coldest air ...
CNN

Millions wake up to extreme cold that’s breaking records as it spreads east

An arctic air mass has descended into the US, and a disrupted polar vortex will keep the nation in the freezer at times deeper into December. More than 200 million people will wake up to freezing ...
USA Today

Wintery weather from Texas to Maine as Arctic air hits US

Baby, it's colder than normal outside! December is off to a chillier-than-typical start for much of the country. More frosty temperatures hit parts of the north-central U.S. on Thursday, Dec. 4, and ...