air mass

noun

Definition of air mass

: a body of air extending hundreds or thousands of miles horizontally and sometimes as high as the stratosphere and maintaining as it travels nearly uniform conditions of temperature and humidity at any given level

Examples of air mass in a Sentence

Recent Examples on the Web

But when the super-wet air mass meets mountains or hills, a lot pours out. Anchorage Daily News, "Atmospheric rivers are sometimes good, sometimes bad for Alaska," 31 Aug. 2019 The exceptionally warm air mass has brought with it noticeable humidity, but that doesn't necessarily mean southern Alaska has seen more rain. Matthew Cappucci And Andrew Freedman, chicagotribune.com, "More freak weather comes to Alaska, which has had an unprecedented summer," 19 Aug. 2019 That strong temperature gradient, along with the high moisture content of the air mass, helped to generate billowing clouds able to generate lightning. Robin George Andrews, National Geographic, "Lightning struck near the North Pole 48 times. It's not normal.," 13 Aug. 2019 The cold snap is due to a dry air mass over the U.P., and should clear up by Saturday, Michels said. Emma Keith, Detroit Free Press, "Wintry temperatures, frost hit Michigan's Upper Peninsula," 23 Aug. 2019 At the same time, the intense wildfires raging throughout Siberia may have given the warm air mass an injection of smoke. Robin George Andrews, National Geographic, "Lightning struck near the North Pole 48 times. It's not normal.," 13 Aug. 2019 Most of our extreme melt days on the Greenland ice sheet are associated with warm air masses moving from the west and south. Washington Post, "The Greenland ice sheet poured 197 billion tons of water into the North Atlantic in July alone," 3 Aug. 2019 This flow tends to propel warm and humid air masses into New England. Dave Epstein, BostonGlobe.com, "July will be the warmest month ever recorded in Boston," 31 July 2019 Where these two vastly different air masses clash, severe storms are in the forecast. Matthew Cappucci, chicagotribune.com, "‘Ring of fire’ pattern brings dangerous heat, severe storms, flooding," 15 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'air mass.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of air mass

1882, in the meaning defined above

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Last Updated

14 Oct 2019

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Time Traveler for air mass

The first known use of air mass was in 1882

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