The Guinness Book of World Records lists the fastest jet stream wind on Earth at 416.5 km/h, recorded by a weather balloon above Tottori, Japan, on February 5, 2004. Content continues below The ...
The supersonic jet-stream winds circling WASP-127b at its equator are the fastest of their kind on any known planet. "There is an extremely fast circumplanetary jet wind found on the planet.