What is the polar vortex?
Record freeze settles into eastern United States, affects 200 million people - ABC News
Polar Vortex' Creates Amazing Temperature Spread | Live Science
The "Polar Vortex" of 2014
Yes, Brutal Cold Is Barreling Down From the Arctic, but No, It's Not the Polar Vortex | Discover Magazine
What is the 'polar vortex'?
Polar Vortex Building in North America
What a Polar Vortex Is, and Why It Can Be Dangerous
US polar vortex: extreme cold weather heads to east coast – live | US news | The Guardian
What Is the Polar Vortex? | NOAA SciJinks – All About Weather
The U.S. is about to get a potent polar vortex blast | Mashable
In pictures: Polar vortex strikes North America - BBC News
/cloudfront-ap-southeast-2.images.arcpublishing.com/nzme/IBI66C5W2XCSQMALZNJV4JVFXQ.jpg "Polar vortex: What to wear for a North American winter - NZ Herald")
Polar vortex: What to wear for a North American winter - NZ Herald
Analysis: Polar Vortex collapse causes heavy winter for North America and the Nordics - Kjeller Vindteknikk
Polar vortex causes record cold in US | KidsNews
The 2013-2014 polar vortex adds data points to the books – Climate Change: Vital Signs of the Planet
US Midwest deep freeze: Polar vortex weakens but temperatures in some parts continue to tumble
Weakened 'polar vortex' blamed for N. American chill
Polar Vortex: Watch: Woman Walks Out With Wet Hair In US. The Cold Air Does This
Arctic Weather Plunges into North America
A warming wave will start in the stratosphere, with the Polar Vortex being temporarily displaced, as it heads towards North America with cold weather » Severe Weather Europe
What Is A Polar Vortex? Your Freezing Cold Questions Answered : NPR
