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 If not a tornado, then a sudden blast of straight-line wind could have been generated if part of the mesocyclone itself descended to the surface as a microburst-like downdraft. Washington Post, 2 July 2021 This storm complex was not a supercell; Doppler radar never detected a rotating updraft (called a mesocyclone). Washington Post, 27 May 2021 Sillin’s analysis focused on where the beam is below 6,000 feet above the ground since this is where a storm’s low-level mesocyclone is located and thus important for detecting tornadoes. Marshall Shepherd, Forbes, 20 Mar. 2021 For this additional supercell, radar implied a counterclockwise rotation indicative a fairly broad mesocyclone. Washington Post, 4 Sep. 2020 And the shear can initiate a region of rotation in the updraft, called a mesocyclone. Washington Post, 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, 16 Apr. 2020 Water droplets from the mesocyclone's moist air form a funnel cloud. Ron Johnson, National Geographic, 28 Aug. 2019 Bow echoes at times contain vortices, including a type called a mesocyclone contained in classic, isolated supercells. Jeff Halverson, Washington Post, 15 May 2018

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

12 Jul 2021

Cite this Entry

“Mesocyclone.” Dictionary, Merriam-Webster, Accessed 28 Jul. 2021.

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