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Strong warm updrafts carrying large amounts of moisture interacting with fast-moving cool, dry winds above cause tornadoes when the two air currents begin to swirl around each othe...

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.

What causes tornadoes?


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

Tornado Facts: Causes, Formation & Seeking Shelter - LiveScience


Jul 10, 2012 ... An average of 800 tornadoes are reported each year, resulting in 80 deaths and 1,500 injuries. Let's take a look at what causes these ...

The important aspect of the definition is that the tornado or funnel cloud is in contact with the ground. While at first it would seem this is a consequence of the Coriolis effect , tornadoes are over almost as quickly as they start. In the United States, a unique com... More »
By Rachelle Oblack, About.com Guide

Tornadoes - Weather Wiz Kids weather information for kids


A tornado is a violent rotating column of air extending from a thunderstorm to the ... Waterspouts can sometimes move inland, becoming tornadoes causing ...

What causes tornadoes? | MNN - Mother Nature Network


Apr 8, 2014 ... The U.S. has more tornadoes than anywhere else on Earth, but their sudden twists and turns still make them mysterious and mesmerizing.

What Causes Tornadoes - YouTube


Dec 12, 2013 ... This is a Science Made Easy Video. A quick and fun cartoon lesson about tornadoes. Great for teachers and students- hope you guys enjoy!

Severe Weather 101: Tornado Basics - NSSL - NOAA


The most common and practical way to determine the strength of a tornado is to look at the damage it caused. From the damage, we can estimate the wind ...

The Science of Tornadoes | Weather Underground


The truth is that scientists don't fully understand how tornadoes form. ... At the time of this radar scan, a tornado was on the ground. ... What causes tornadoes?

Popular Q&A
Q: What causes tornadoes?
A: From our video partners Birth Control Safe and effective options. Cool, dry air meeting warm, moist air When hot and cold air mixes it forms a funnel The warm a... Read More »
Source: wiki.answers.com
Q: What causes tornadoes?
A: This is an explanation I gave to an elementary school age child a few days ago. She seemed satisfied with it: Look at this picture, it shows a wave breaking at ... Read More »
Source: www.quora.com
Q: What causes tornadoes?
A: Environment Canada describes tornadoes as a vortex of violently circulating winds that extends from the base of a cloud to the Earth's surface. The strongest to... Read More »
Source: www.cbc.ca
Q: What causes tornadoes?
A: Tornadoes form in unusually violent thunderstorms when there is sufficient (1) instability, and (2) wind shear present in the lower atmosphere. Read More »
Source: www.kgbanswers.com
Q: What causes tornadoes?
A: Tornadoes form under a certain set of weather conditions in which three very different types of air come together in a certain way. Near the ground lies a layer... Read More »
Source: www.querycat.com