Question

what is a jet stream ?

Answer 1

a narrow variable band of very strong predominantly westerly air currents encircling the globe several miles above the earth. There are typically two or three jet streams in each of the northern and southern hemispheres

Answer 2

Explanation:

Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of some planets, including Earth. On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds. Their paths typically have a meandering shape‼️‼️‼️♥️♥️♥️(◡ ω ◡)(◡ ω ◡)