High speed, high altitude wind that move air masses. What is that called?

It is called jet streams. These are quick streaming, tight, wandering air ebbs and flows in the airs of a few planets, including Earth. On Earth, the principle fly streams are situated close to the elevation of the tropopause and are westerly breezes. Their ways commonly have a winding shape. Fly streams may begin, stop, split into at least two sections, consolidate into one stream, or stream in different bearings including inverse to the course of the rest of the fly.