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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 Formation - Windows to the Universe

www.windows2universe.org/earth/Atmosphere/tornado/formation.html

... 2015 00:00:00. Atmospheric conditions typical during tornado formation. ... A tornado begins in a severe thunderstorm called a supercell. A supercell can last ...

How Are Tornadoes Formed - Universe Today

www.universetoday.com/71983/how-are-tornadoes-formed/

Aug 24, 2010 ... There is a clear set of steps in the formation of a tornado. First, just before the thunderstorm develops, a change in wind direction and an ...

How are Tornadoes Formed? - Conserve Energy Future

www.conserve-energy-future.com/how-do-tornadoes-form.php

How Do Tornadoes Form? A tornado is a strong, turbulent column of air, moving fast and keeping in contact with the earth's surface and a vertically formed cloud ...

How a Tornado Forms in 4 Steps - Popular Mechanics

www.popularmechanics.com/science/environment/a15633/how-a-tornado-forms-in-4-steps/

As air rushes in to equalize the pressure, a tornado is formed. ... Tornadoes can form anywhere, at any time of year, but most occur between April and July, either  ...

www.ask.com/youtube?q=Formation of a Tornado&v=006guBgSf14
Jun 2, 2010 ... Awesome footage of a tornado developing just outside Campo, Colorado. 05/31/ 2010. Incredible view of it from less than a mile away! You can ...
www.ask.com/youtube?q=Formation of a Tornado&v=cvOut9VUqKY
Feb 25, 2011 ... I found this interesting video about how tornadoes from kinda cool =) ... Awesome footage of tornado forming and touching ground - Duration: ...

How do tornadoes form? - eSchooltoday

eschooltoday.com/natural-disasters/tornadoes/how-do-tornadoes-form.html

tornado tips Step 6: The tornado is fully formed now and moving in the direction of the thunderstorm winds. When the pointed part of the tornado touched the ...

Tornado Story | How Tornadoes Form - Dangerous Weather

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

Tornadoes are associated with large (supercell) thunderstorms that often grow to over 40,000 feet. A column of warm humid air will begin to rise very quickly. 1.

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.

Popular Q&A
Q: What are the steps in the formation of a tornado?
A: Here are the 4 steps: 1. The wind moves in 2 different directions and a layer of air in the middle of the winds starts to spin. 2. The spinning air turns vertic... Read More »
Source: wiki.answers.com
Q: What is needed for a formation of a tornado?
Source: www.chacha.com
Q: What are the optimal conditions for the formation of a tornado?
A: Supercells, AND a hot humid day that ends with cool heavy winds, gusts. Thats been my experience. Also during April when the most tornados occur there is an ann... Read More »
Source: www.quora.com
Q: What is the role of downdrafts in the formation of a tornado?
A: Tornadoes usually form from a type of thunderstorm called a supercell, which has a rotating updraft called a mesocyclone. A downdraft at the back of the storm, ... Read More »
Source: wiki.answers.com
Q: What discipline is the formation of a tornado examined in?
A: The formation of a tornado would be be examined in the Read More »
Source: www.chacha.com