How high does the jet stream get and how wide is it?
We didn’t even know there was a jet stream until WWII. At that point in time, they were getting ready to bomb Japan and were testing their equipment. They would fly up very high and hit these 100 mile per hour headwinds. The jet stream is a very high altitude phenomenon. There are rare cases where the jet stream can descend, but generally you can start to feel the jet stream about 20,000 feet up. It also moves North and South a slight bit from day to day. It is a narrow band of wind. It makes a loop around Earth. To the north and south of that high-speed river of air, at the same altitude, the wind speed can be relatively light.
