air mass


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 if the air mass could moisten up and douse some of the flames, that would help. Matt Day, The Seattle Times, "Seattle’s smoke is clearing. Now it’s up to rain and wind to finish the job," 27 Aug. 2018 Derechos tend to form in summer along the northern edge of a hot and humid air mass. Tom Skilling,, "Ask Tom: Is there a reason one particular area keeps getting hit by severe thunderstorms?," 12 July 2018 Buttrick said a new cold air mass is due to arrive sometime Friday, and a shift to cooler temperatures is expected. John R. Ellement,, "Town of Orange hit 100 degrees Sunday," 2 July 2018 Now imagine these air masses are only about 10 miles apart. Matthew Cappucci, Washington Post, "A ‘dryline’ is triggering severe weather in the Plains. Here’s what that means.," 1 May 2018 Some showers and thunderstorms will accompany the arrival of the warmer air, but colder weather returns by Sunday as another chilly air mass sweeps into the area following the passage of a strong cold front. Tom Skilling,, "More snow, then a brief spring fling," 8 Apr. 2018 With the change in air mass, Wednesday and Thursday should be pleasant, bringing dry weather and a glimpse of sun, Simpson said. Elise Takahama,, "Scattered showers will hit Boston this weekend, along with increasing clouds and humidity," 14 July 2018 And that warm and humid air mass could increase our chances of seeing some afternoon thunderstorms. Greg Porter, Washington Post, "PM Update: Severe storm chance southwest of D.C. this evening; steamy with storm chances again Monday," 13 May 2018 Things should begin to change this weekend as a cold front interacts with the hot and increasingly humid air mass over the area, triggering several rounds of showers and thunderstorms capable of producing downpours and strong winds. Tom Skilling,, "Storms to accompany weekend warmth and humidity," 13 July 2018

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

9 Dec 2018

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Time Traveler for air mass

The first known use of air mass was in 1882

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Rhyming Dictionary: Words that rhyme with air mass Encyclopedia article about air mass

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a nest or breeding place

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