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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.

Tornado - Wikipedia

en.wikipedia.org/wiki/Tornado

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

The Online Tornado FAQ (by Roger Edwards, SPC)

www.spc.noaa.gov/faq/tornado/

Mar 29, 2016 ... The Tornado FAQ is not intended to be a comprehensive guide to tornadoes. Instead, it is a quick-reference summary of tornado knowledge, ...

Tornadoes | Ready.gov

www.ready.gov/tornadoes

Tornadoes are nature's most violent storms. Spawned from powerful thunderstorms, tornadoes can cause fatalities and devastate a neighborhood in seconds.

Tornado Web Server — Tornado 4.4.2 documentation

www.tornadoweb.org/

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can ...

www.ask.com/youtube?q=Tornado&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 ...

Tornadoes 101 - National Geographic

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 ...

Tornadoes - The New York Times

www.nytimes.com/topic/subject/tornadoes

Find articles and multimedia about tornadoes from The New York Times.

Tornado Central - weather.com

weather.com/storms/tornado-central

Monitor severe thunderstorms, tornado threats, and get storm safety and preparedness tips with Tornado Central from weather.com and The Weather Channel.

Tornado Archives - IBHS

disastersafety.org/tornado/

El Niño's effects on winter weather, tornadoes, flood, and high winds events threaten home's and businesses. IBHS provides practical steps to reduce property ...