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A COMPREHENSIVE GLOSSARY OF WEATHER

-J-

Jet Max (or Speed Max, Jet Streak) - a point or area of relative maximum wind speeds within a jet stream.

Jet Streak - A local wind speed maximum within a jet stream.

Jet Stream - Relatively strong winds concentrated in a narrow stream in the atmosphere, normally referring to horizontal, high-altitude winds. The position and orientation of jet streams vary from day to day. General weather patterns (hot/cold, wet/dry) are related closely to the position, strength and orientation of the jet stream (or jet streams). A jet stream at low levels is known as a low-level jet.