Meteorology · Upper Air — Jet Stream
The jet stream is best described as:
- AA surface current in the ocean
- BA narrow band of very strong winds in the upper troposphere, generally flowing west to east✓ Correct
- CA type of low cloud
- DA tropical sea breeze
Explanation
The jet stream is a fast, narrow current of air near the tropopause, usually flowing west to east, marking strong temperature gradients. Its position steers surface systems; mariners and routers watch it because it influences the track and intensity of mid-latitude storms.
Authority: WMO; Bowditch (Pub. No. 9)
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