Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun an
area ofvertical atmospheric rotation insupercell thunderstorms , which signals the threat of a possibletornado .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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The horizontally rotating mass, called a mesocyclone, is the first clue to radar observers that a thunderstorm could produce a tornado.
Storm Warning Nancy Mathis 2007
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With enough air shooting up and down, the pinwheel is knocked on its side, creating a huge rotating mass of clouds called a mesocyclone - the hallmark of a tornado-spawning supercell storm - from which a funnel cloud can shoot down.
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The rotating updraft of a supercell (called a mesocyclone when visible on radar helps the supercell to produce extreme severe weather events, such as giant hail (more than 2 inches in diameter, strong downbursts of 80 miles an hour or more, and strong to violent tornadoes.
A Remarkable Photo From Tornado Country - The Lede Blog - NYTimes.com 2008
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"mesocyclone," the core rotational structure of a thunderstorm, which can produce a tornado.
The New Yorker 2009
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The rotating column a mesocyclone is drawn down to earth by moisture-laden air.
MY EMPIRE OF DIRT Manny Howard 2010
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The rotating column a mesocyclone is drawn down to earth by moisture-laden air.
MY EMPIRE OF DIRT Manny Howard 2010
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The rotating column a mesocyclone is drawn down to earth by moisture-laden air.
MY EMPIRE OF DIRT Manny Howard 2010
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The rotating column a mesocyclone is drawn down to earth by moisture-laden air.
MY EMPIRE OF DIRT Manny Howard 2010
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An F4 landspout hit Colorado a few years back, and landspouts are are caused by significantly different phenomena by definition, they have no mesocyclone.
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meganwaits Diary Entry meganwaits 2009
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