Inside the Jet Stream Giving Rise to the Jet Stream
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Unless you live where it is always warm, you have probably felt the wind associated with a polar front. This wind is generated at the "front" between a large body of cold air and a large body of warm air.
These winds, as strong as they might be at the Earth's surface, get more intense the higher you go. Hitting the lid of the tropopause, the fast-moving wind is funneled into a concentrated band. It forms the polar-front jet stream
