When will the US feel the impact of the polar vortex? | kare11.com
Polar vortex: Best photos of US 'big freeze' | The Independent | The Independent
The polar vortex may be on its way | CNN
Polar Vortex Causes Midwest States Of Emergency As Cold Pushes Farther South : NPR
What is the Polar Vortex?
Polar vortex: Deadly cold weather hits the US
Disrupted polar vortex unleashing colder weather in eastern U.S. - The Washington Post
Polar Vortex in a nutshell - The Statesman
The 2013-2014 polar vortex adds data points to the books – Climate Change: Vital Signs of the Planet
When will the US feel the impact of the polar vortex? | kare11.com
The U.S. is about to get a potent polar vortex blast | Mashable
Polar Express: Arctic outbreak to invade parts of US
Weakened 'polar vortex' blamed for N. American chill
What Is the Polar Vortex? | NOAA SciJinks – All About Weather
As polar vortex lingers, parts of U.S. set for record lows - Oman Observer
What Is A Polar Vortex? Your Freezing Cold Questions Answered : NPR
US weather latest: USA death toll rises as polar vortex delivers snow and extreme cold | Weather | News | Express.co.uk
The polar vortex is coming—and raising the odds for intense winter weather
Polar vortex' makes 187 million in US shiver
/cdn.vox-cdn.com/uploads/chorus_image/image/62956146/DyAV_wOWsAADCyF.0.jpg "The polar vortex, briefly explained - Vox")
The polar vortex, briefly explained - Vox
What's the polar vortex? – DW – 01/08/2014
How frigid polar vortex blasts are connected to global warming
