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Tech & Science dictionary results for atmospheric river.

atmospheric river

American  
[at-muhs-fer-ik riv-er, -feer-] / ˌæt məsˈfɛr ɪk ˈrɪv ər, -ˈfɪər- /

noun

Meteorology.
  1. a long, narrow corridor in the atmosphere that transports massive amounts of concentrated water vapor from the tropics: often responsible for extratropical cyclones and other extreme weather events, but also for commonly weaker systems of rain that replenish water supplies. AR


Etymology

Origin of atmospheric river

First recorded in 1990–95

Example Sentences

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The mine was beneath an atmospheric river that inundated much of Chile, a rare occurrence that meteorologists said was consistent with a strengthening El Niño.

From The Wall Street Journal Aug. 29, 2026

By late April, temperatures had begun to rise, but reports indicated that unsettled, wet conditions were still on the way for Southcentral and Southeast Alaska as an atmospheric river approached.

From Science Daily May 6, 2026

Heavy rain from an atmospheric river system caused flooding and mudslides, particularly in areas still scarred by wildfires.

From Salon Dec. 27, 2025

Which is why water managers — and skiers — are hoping for a Christmas miracle as an enormous atmospheric river takes aim at California this week.

From Los Angeles Times Dec. 22, 2025

The rains would be fueled by atmospheric river storms, which pounded the Pacific Northwest earlier this month, causing flooding and evacuations.

From Los Angeles Times Dec. 16, 2025

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