Web Results

en.wikipedia.org/wiki/Tornado

There are several scales for rating the strength of tornadoes. The Fujita scale rates tornadoes by damage caused and has been replaced in some countries by the updated Enhanced Fujita Scale. An F0 or EF0 tornado, the weakest category, damages trees, but not substantial structures. An F5 or EF5 tornado, the strongest  ...

sciencing.com/causes-effects-tornadoes-8204458.html

Apr 25, 2017 ... A large thunderstorm that encounters certain atmospheric conditions can produce tornadoes, the large, fast-moving funnels of wind that cause damage and deaths annually in America. Tornadoes can appear in groups, but even one can leave devastating effects in a very short time. Some have destroyed ...

www.eartheclipse.com/natural-disaster/various-causes-and-effects-of-torandoes.html

Tornadoes are violent, fast spinning columns of air that are in contact with both the earth's surface and the thunderstorm clouds high up in the sky. Tornadoes are the most disastrous catastrophes within human lifetimes.

www.eartheclipse.com/natural-disaster/what-is-a-tornado-and-what-causes-a-tornado.html

The wind shear and unstable air results in updrafts and downdrafts in the violent thunderstorm that causes tilting of the winds, forming an upright tornado vortex. This is influenced by the changes in wind speed and direction in the upper areas of the atmosphere that causes an upright spinning effect in the lower region.

www.conserve-energy-future.com/types-and-causes-of-tornadoes.php

The formation of tornadoes is followed in a set pattern of simple steps. Firstly, when the thunderstorm approaches, the wind direction, speed changes in the upper area of the atmosphere and causes an invisible horizontal spinning effect in the lower region. Secondly, the horizontal air is tilted to vertical because of the rising ...

sites.google.com/a/pcs.k12.nc.us/kempbooks/home/night-of-the-twisters-research-projects/madison

The warm air starts to twist into a spiral, which causes a funnel cloud. Then the funnel cloud starts to extend and reaches the earth's surface. If you didn't understand that then here's another way to explain it. You need a supercell and a rotating updraft to form a tornado. Winds that are at ground level go slower because it ...

eschooltoday.com/natural-disasters/tornadoes/impact-of-tornadoes.html

The impact of Tornados Like all natural disasters such as hurricanes, earthquakes, floods and others, they end up with massive destruction to homes, property, infrastructure and cause many deaths as well. Each year, about 60 people are killed by tornadoes, mostly from airborne debris. Source: noaa.gov. This means ...

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

Apr 19, 2016 ... Tornadoes are the most violent storms in nature. An average of 800 tornadoes are reported each year, resulting in 80 deaths and 1,500 injuries. Tornadoes are a worldwide phenomenon, touching down in every continent save Antarctica.

study.com/academy/lesson/what-are-tornadoes-definition-causes-the-enhanced-fujita-scale.html

Tornadoes are dangerous storms that affect millions of people. In this video lesson, you ... Hurricanes: Types, Formation, Causes & Effects. What Is a Hurricane? .... millions of people. In this video lesson, you will learn how and where they form, as well as how scientists classify tornadoes using the Enhanced Fujita Scale.