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en.wikipedia.org/wiki/Tornado_intensity

Tornado intensity can be measured by in situ or remote sensing measurements, but since these ... An EF0 tornado will probably damage trees but not substantial structures, ... For many years, before the advent of Doppler radar, scientists had nothing more than educated guesses as to the speed of the winds in a tornado.

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

They also occur in many other parts of the world, including Australia, Europe, Africa, Asia, and South America. What type of damage can tornadoes do?

www.spc.noaa.gov/faq/tornado

How does a tornado do damage? Most of ... for example, can do enormous damage even if the wind at the building site isn't that strong on its own. ... walls, trees and cars, actually happen in many tornadoes.

www.reference.com/science/much-damage-can-tornado-a118add197be5464

All tornadoes are possible of causing damage to structural buildings and human life, explains ECoffeeOnline.com. Some tornadoes, depending on their size, ...

sciencing.com/damage-caused-tornado-5529386.html

They can stay on the ground for a few seconds to many minutes and can ... The wind is a tornado's primary weapon, but tornadoes can also do damage with ...

stormdamagecenter.org/tornado-damage.php

Learn about tornado damage and find a NSDC certified contractor that can help you ... can do a substantial amount of damage to your roof, windows and exterior. ... its path, whereas an F-0 tornado is much less likely to cause serious damage.

www.quora.com/How-much-damage-do-tornadoes-cause-in-the-United-States-each-year

Measure by whatever metric you think answers the question ... A University of Colorado study[1] took a look at this not too long ago. They plotted Storm Prediction ...

www.econet.org.uk/weather/tornad.html

Tornadoes can produce the strongest winds on earth, close to 300 miles per hour ... wide, their destructive path can cause damage a mile wide for over 50 miles.

www.weatherwizkids.com/weather-tornado.htm

Damage paths can be in excess of one mile wide to 50 miles long. In an average year ... Tornado How do tornadoes form? Most tornadoes form from thunderstorms. ... An area of rotation, 2-6 miles wide, now extends through much of the storm.

www.telegraph.co.uk/news/worldnews/northamerica/usa/10071894/Oklahoma-tornado-why-it-caused-so-much-damage.html

May 21, 2013 ... Oklahoma tornado: why it caused so much damage ... the north creates an updraft which can begin to rotate as the winds change direction.