The 2013-2014 polar vortex adds data points to the books – Climate Change: Vital Signs of the Planet
What is the polar vortex?
What is the 'polar vortex'?
In pictures: Polar vortex strikes North America - BBC News
Eight die as polar vortex brings life-threatening temperatures to US Midwest | US News | Sky News
Weakened 'polar vortex' blamed for N. American chill
Polar Vortex' Creates Amazing Temperature Spread | Live Science
Weakening polar vortex may yield longer, harsher winters in North America
Yes, Brutal Cold Is Barreling Down From the Arctic, but No, It's Not the Polar Vortex | Discover Magazine
Polar Vortex Satellite Image of North America, USA Stock Illustration - Illustration of polar, weather: 44964613
US Midwest deep freeze: Polar vortex weakens but temperatures in some parts continue to tumble
/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
Polar vortex' brings record cold to US | Al Jazeera America
The U.S. is about to get a potent polar vortex blast | Mashable
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
/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
Polar vortex causes record cold in US | KidsNews
US polar vortex: extreme cold weather heads to east coast – live | US news | The Guardian
What a Polar Vortex Is, and Why It Can Be Dangerous
Polar Vortex: Watch: Woman Walks Out With Wet Hair In US. The Cold Air Does This
January–February 2019 North American cold wave - Wikipedia
Analysis: Polar Vortex collapse causes heavy winter for North America and the Nordics - Kjeller Vindteknikk
Extreme Cold Weather Spreads East - The New York Times
