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SESK: Stuff Everyone Should Know · sesk.info/aero-jet-stream

What is the jet stream?

A narrow band of very fast wind high up, usually blowing west to east.

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  1. A trail of exhaust behind jet airplanes
  2. A warm ocean current near Florida
  3. A fast, narrow river of wind high in the sky ✔

Why: The jet stream is a high-speed, narrow stream of wind found near the top of the troposphere. It usually flows from west to east, which can speed up eastbound flights.

Huh, didn't know that: A west-to-east jet stream can give an eastbound aircraft a tailwind.

The dad joke
Why do pilots love the jet stream flying east? It gives them a great tail-ent.
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References

Answer: A fast, narrow river of wind high in the sky. The jet stream is a high-speed, narrow stream of wind found near the top of the troposphere. It usually flows from west to east, which can speed up eastbound flights.

  1. FAA Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 12 Weather Theory www.faa.gov/regulations_policies/handbooks_manuals/aviation/faa-h-8083-25c.pdf
    Jet stream. A high-velocity narrow stream of winds, usually found near the upper limit of the troposphere, which flows generally from west to east.
    Checked 2026-10-10.

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