It also causes turbulence when they bisect the jet stream by flying directly across it or against the flow of wind. Airplanes often make use of the jet stream during their treks across the world. This is the world shown in the TV show 'Avatar: The Last Airbender'. Except for the 4 symbols on the sides (Water, Earth, Fire, Air). Every bit of it (including the ocean) is from satellite photos of the actual Earth. If the Gaang caught one of those South-North/North-South jet stream 'highways,' then they very well could have made it to where they were going in a few hours. This is much more impressive then it looks at first.

When posting a map, link directly to the image (or GIF/video, if animated map). Feel free to check my feed for more content from your favorite fantasy books, movies, shows and games More info right HERE. These are more common in Spring and Summer and less common during Fall and Winter because these bends in the jet streams are created by temperature variances. Heres a detail of my ATLA map Hope you like it. Depending on the time of year, there could be more or fewer troughs/ridges meaning more South-North/North-South traveling jet streams. Midlatitude cyclones (Low pressure systems with cold/warm/occluded fronts) travel along these troughs while High pressure areas (ridges) typically have calm, sunny weather. But while true, jet streams typically run East-West, they also run South-North and North-South depending on the trough/ridge patterns. Setting A map of the four nations Avatar: The Last Airbender is set in a world where human civilization consists of four nations, named after the four classical elements: the Water Tribes, the Earth Kingdom, the Fire Nation, and the Air Nomads. So there would be no 'fast lanes' North-South. That's where the beauty of jetstreams comes in, they run predominately East-West.

Map of avatar the last airbender world in real life