The Jet Stream

https://en.wikipedia.org/wiki/Jet_stream
http://www.livescience.com/27825-jet-stream.html
http://www.skepticalscience.com/jetstream-guide.html
http://www.bbc.com/news/science-environment-37508156
http://www.metoffice.gov.uk/learning/wind/what-is-the-jet-stream

Video
https://www.youtube.com/watch?v=CgMWwx7Cll4