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Tornado Facts: Causes, Formation & Seeking Shelter - Live Science

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

Apr 19, 2016 ... Tornadoes are violent storms that kill 80 people each year. Here are some facts about how they form and how to stay safe.

Tornadoes - Weather Wiz Kids weather information for kids

www.weatherwizkids.com/weather-tornado.htm

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

www.ask.com/youtube?q=What Cause Tornadoes&v=ep2YY_D7wdk
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!

What causes tornadoes? | MNN - Mother Nature Network

www.mnn.com/earth-matters/translating-uncle-sam/stories/what-causes-tornadoes

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.

About Tornadoes | Weather Underground

www.wunderground.com/resources/education/tornadoFAQ.asp

What causes tornadoes? Tornadoes form under a certain set of weather conditions in which three very different types of air come together in a certain way .

The Science of Tornadoes | Weather Underground

www.wunderground.com/resources/severe/tornadoFAQ.asp

The truth is that scientists don't fully understand how tornadoes form. ... and the surrounding winds may cause the updraft to begin rotating-and a tornado is born.

WHAT CAUSES TORNADOES AND HURRICANES?

www.theweatherprediction.com/basic_weather_questions/tornadoes_hurricanes.html

A tornado is rapidly spinning air that develops from a thunderstorms and is ... This rising air is what causes all the rain and hail to form from the water in the air.

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 ... and hail in the thunderstorm cause the funnel to touch down creating a tornado .

What causes tornadoes? | Escambia County, Florida

www.myescambia.com/beready/what-causes-tornadoes

These thunderstorms often produce large hail, strong winds and tornadoes. Occasionally, large outbreaks of tornadoes occur along strong frontal systems that ...

Tornadoes - USATODAY.com

usatoday30.usatoday.com/weather/wtwist2.htm

A basic guide to what causes tornadoes. By Jack Williams, USATODAY.com. The National Weather Service defines a tornado as "a violently rotating column of ...

Answer
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.
More Info

What causes tornadoes?

www.weatherquestions.com

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

Severe Weather 101: Tornado Basics

www.nssl.noaa.gov

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 ...

Types and Causes of Tornadoes - Conserve Energy Future

www.conserve-energy-future.com

Types and Causes of Tornadoes: A tornado is a strong, turbulent column of air, moving fast and keeping in contact with the earth's surface and a vertically ...