Polar Vortex explained in under 120 seconds

Subscribe to BBC News    / bbcnews   Subscribe to BBC News HERE http://bit.ly/1rbfUog Ever wondered what Polar Vortex was? Here's BBC's Tomasz Schaferneker with his guide. For latest weather updates why not follow @bbcweather Check out our website: http://www.bbc.com/news Facebook:   / bbcworldnews   Twitter:   / bbcworld   Instagram:   / bbcnews