A very fast high-altitude river of air that forms in the upper troposphere is called a(n)

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A jet stream is a very strong high-altitude river of air that moves rapidly from west to east in the upper troposphere. It can greatly affect weather patterns and air travel routes, and is a key feature of atmospheric circulation. Typhoons and monsoons are weather systems that are not directly related to the jet stream. An air mass is a large body of air with similar temperature and moisture characteristics, but it is not necessarily fast-moving or in the upper troposphere.

A Very Fast High-Altitude River of Air That Forms in the Upper