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Clouds form when water vapor condenses in the air. This releases heat, which increases the updraft temperature and the kinetic energy of air movement. In supercell thunderstorms, updrafts are strong and may create a vortex of air that may form a tornado.
Most scientists consider this to be a simplified and incomplete explanation. The finer details of tornado formation and dissipation are still unknown.

Tornado

en.wikipedia.org/wiki/Tornado

The wind of the tornado has a much wider radius than the funnel itself. .... to cyclostrophic balance) usually causes water vapor in the air to condense into cloud ...

Tornado Story | How Tornadoes Form - Dangerous Weather

www.eo.ucar.edu/kids/dangerwx/tornado3.htm

How Do Tornadoes Form? Tornadoes are associated with large (supercell) thunderstorms that often grow to over 40,000 ... Faster Spin Makes a Funnel Cloud.

Tornadoes - Weather Wiz Kids weather information for kids

www.weatherwizkids.com/weather-tornado.htm

Tornadoes What is a tornado? A tornado is a violent rotating column of air extending from a thunderstorm to the ground. The most violent tornadoes are capable ...

www.ask.com/youtube?q=What Makes a Tornado&v=lmWh9jV_1ac
Aug 19, 2014 ... ... Tornadoes are the most violent storms on Earth, with wind velocities that can e. .. ... What Causes Tornadoes - Duration: 2:55. The Science ...

Tornado Facts: Causes, Formation & Seeking Shelter - LiveScience

www.livescience.com/21498-tornado-facts.html

Jul 10, 2012 ... Tornadoes are violent storms that kill 80 people each year. Here are some facts about how they form and how to stay safe.

How Tornadoes Form and Why They're so Unpredictable

news.nationalgeographic.com/2015/05/150511-tornadoes-storms-midwest-weather-science/

May 11, 2015 ... A tornado lowers to the ground near Chickasha, Oklahoma, on May 6. ... "Then the updraft tends to rotate, and that makes a supercell," explains ...

Severe Weather 101: Tornado Basics - NSSL - NOAA

www.nssl.noaa.gov/education/svrwx101/tornadoes/

Basic information about tornadoes, from the NOAA National Severe Storms ... This makes it possible to express ratings in terms of one scale to the other, ...

What causes tornadoes?

www.weatherquestions.com/What_causes_tornadoes.htm

May 30, 2013 ... A description of the special conditions that can cause a thunderstorm to become tornadic.

How Do Tornadoes Form - Universe Today

www.universetoday.com/75695/how-do-tornadoes-form/

Oct 14, 2010 ... The formation of a tornado follows a clear set of steps. ... If the RFD cannot further provide any more warm air to the tornado, it begins to die.

Popular Q&A
Q: What makes tornadoes.
A: The atmosphere. Visit http://esminfo.prenhall.com/science/geoanimations/animations/Tornadoes.html for more info. Read More »
Source: www.answers.com
Q: What Makes a Tornado?
A: This website is accessible to all versions of every browser. But if you see this message, your browser doesn't support all of today's Web standards and can't pr... Read More »
Source: knowledgenews.net
Q: What makes a tornado spin?
A: A tornado's spin originates in wind shear, which is a difference in wind speed or direction at different altitudes. If this wind shear is strong enough air may ... Read More »
Source: wiki.answers.com
Q: What makes a tornado a tornado?
A: A tornado is a violently rotating column of air extending from the base of a thunderstorm to the ground. In other words, a tornado must be a spinning vortex wit... Read More »
Source: wiki.answers.com
Q: What makes a tornado.
A: The process of tornado formation starts when wind shear starts the updraft a a thunderstorm rotating, turning it into a supercell. If the right kind of down dra... Read More »
Source: www.answers.com