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A tornado is a violently rotating column of air extending from a thunderstorm to the ground. Tornadoes in the US occur most frequently in spring and summer.
The strongest tornadoes have rotating winds of more than 250 mph. Damage can include roof removal or complete destruction of buildings, uprooted trees, and can be life-threatening as a result.

en.wikipedia.org/wiki/Tornado

A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus ...

www.ask.com/youtube?q=Tornadoes&v=oWIx3Erswh8
Nov 2, 2016 ... Top 10 best tornado video countdown. Tornadoes manifest themselves in all sorts of shapes and sizes. Some are a wondrous bright white, ...
www.ask.com/youtube?q=Tornadoes&v=bjb7QtMEBUg
May 7, 2016 ... SEE ALSO: 360 Video! https://www.youtube.com/watch?v=TCXp9Y5uPn4 E xtreme up-close footage of tornado just north of Wray, CO earlier ...

www.spc.noaa.gov/faq/tornado

May 1, 2017 ... The Tornado FAQ is not intended to be a comprehensive guide to tornadoes. Instead, it is a quick-reference summary of tornado knowledge, ...

www.ready.gov/tornadoes

This page explains what actions to take when you receive a tornado watch or warning alert from the National Weather Service for your local area and what to do ...

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

Basic information about tornadoes, from the NOAA National Severe Storms Laboratory.

www.tornadoproject.com

The Tornado Project is a small company that researches, compiles and makes tornado information available to tornado and severe weather enthusiasts, the ...

www.washingtonpost.com/news/capital-weather-gang/wp/2017/06/13/violent-tornadoes-obliterated-homes-and-barns-in-wyoming-on-monday-night

Jun 13, 2017 ... One of the violent tornadoes that formed Monday evening in Carpenter, Wyo., took an unfortunate route straight through a home (video above).

video.nationalgeographic.com/video/101-videos/tornadoes-101

Tornadoes, nearly three-quarters of which occur within the U.S., are unpredictable and can cause massive damage. New tools and data are helping scientists ...