me·​so·​cy·​clone | \ ˌme-zə-ˈsī-ˌklōn How to pronounce mesocyclone (audio) , ˌmē-, -sə-ˈsī- \

Definition of mesocyclone

: a rapidly rotating air mass within a thunderstorm that often gives rise to a tornado

Examples of mesocyclone in a Sentence

Recent Examples on the Web And the shear can initiate a region of rotation in the updraft, called a mesocyclone. Washington Post, "How several damaging storms plastered parts of the Washington region Thursday," 26 June 2020 In particularly humid environments, the rotating part of the thunderstorm - known as the mesocyclone - can condense into a cloud that scrapes the ground surrounding the twister. Matthew Cappucci, Anchorage Daily News, "2-mile wide Mississippi tornado, state’s largest on record, carved a 67-mile path," 16 Apr. 2020 Water droplets from the mesocyclone's moist air form a funnel cloud. Ron Johnson, National Geographic, "THE BEST OF NATIONAL GEOGRAPHIC DELIVERED TO YOUR INBOX," 28 Aug. 2019 Bow echoes at times contain vortices, including a type called a mesocyclone contained in classic, isolated supercells. Jeff Halverson, Washington Post, "Monday’s nasty line of storms wasn’t quite a derecho, but was impressive by many measures," 15 May 2018 Between these two air masses, a mesocyclone formed. Matthew Cappucci, Washington Post, "Three-inch hail and multiple tornadoes raked the Sunshine State on Tuesday," 11 Apr. 2018 The combination of moderate destabilization and shear is sufficient to support a few strong multicellular-type thunderstorms, and perhaps even a supercell or two (which contains a rotating updraft called a mesocyclone). Jeff Halverson, Washington Post, "Thunderstorms possible this afternoon, a few could be strong or severe," 23 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mesocyclone.' 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 mesocyclone

1963, in the meaning defined above

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Last Updated

29 Jun 2020

Cite this Entry

“Mesocyclone.” Dictionary, Merriam-Webster, Accessed 8 Aug. 2020.

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Rhyming Dictionary: Words that rhyme with mesocyclone Encyclopedia article about mesocyclone

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