jet stream
noun
: a long narrow meandering current of high-speed winds near the tropopause blowing from a generally westerly direction and often exceeding a speed of 250 miles (402 kilometers) per hour
Examples of jet stream in a Sentence
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But many times during winter in the northern hemisphere, the polar vortex will expand and send blasts of frigid air southward along the jet stream, the National Weather Service said.
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Jordan Green, Nashville Tennessean, 8 Dec. 2025
There are signs that a brief reprieve from the Arctic air may occur by the middle of next week as the jet stream strengthens, keeping the brutal cold air just to our north for a few days.
—Trey Fulbright, CBS News, 5 Dec. 2025
Normally, the jet stream locks the vortex in and keeps it there.
—Bebe Hodges, Cincinnati Enquirer, 5 Dec. 2025
The vortex will expand and send cold air southward with the jet stream during the winter.
—Brayden Garcia, Fort Worth Star-Telegram, 4 Dec. 2025
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Jordan Green, Nashville Tennessean, 8 Dec. 2025
There are signs that a brief reprieve from the Arctic air may occur by the middle of next week as the jet stream strengthens, keeping the brutal cold air just to our north for a few days.
—Trey Fulbright, CBS News, 5 Dec. 2025
Normally, the jet stream locks the vortex in and keeps it there.
—Bebe Hodges, Cincinnati Enquirer, 5 Dec. 2025
The vortex will expand and send cold air southward with the jet stream during the winter.
—Brayden Garcia, Fort Worth Star-Telegram, 4 Dec. 2025
See All Example Sentences for jet stream
Cite this Entry
“Jet stream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jet%20stream. Accessed 15 Dec. 2025.
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