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

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The recurring trough frequently pushed the jet stream south, helping curve storms northward parallel to the East Coast and then out to sea, following the prevailing west to east wind pattern. Julia Jacobo, ABC News, 31 Dec. 2025 This combination of factors — sharp temperature contrasts, rapid pressure drop, jet stream support and sometimes lake enhancement — is what makes a bomb cyclone so intense, capable of producing blizzard conditions and heavy snow in a short period of time. Brandi D. Addison, Freep.com, 28 Dec. 2025 There will be a shift in our jet stream pattern by the weekend, which will help allow some of the Pacific moisture to move into Colorado. Alex Lehnert, CBS News, 23 Dec. 2025 Study co-author and project scientist John Dykema suggests that the large coagulated smoke particles could affect atmospheric circulation through local heating, potentially shifting jet streams. Stefanie Waldek, Space.com, 16 Dec. 2025 See All Example Sentences for jet stream

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of jet stream was in 1947

Browse Nearby Words

Cite this Entry

“Jet stream.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jet%20stream. Accessed 2 Jan. 2026.

Kids Definition

jet stream

noun
: a long narrow wandering current of high-speed winds blowing from a generally westerly direction several miles above the earth's surface

More from Merriam-Webster on jet stream

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