Tornadoes

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Home > Weather > Tornadoes

Tornado Info:

A tornado is a violent windstorm characterized by a twisting, funnel-shaped cloud. The word "tornado" comes from the Spanish verb "tornar", meaning "to turn."

It is spawned by a thunderstorm and produced when cool air overrides a layer of warm air, forcing the warm air to rise rapidly. Many tornadoes are the tail end of a mesocyclone and they have a characteristic "hook echo" signature on a radar screen. The damage from a tornado is a result of the high wind velocity and wind-blown debris. Tornado winds range from a slow 40 mi/h (65 km/h) at the low end to a possible 300 mi/h (480 km/h) in the strongest storms. Tornado season in North America is generally March through August, although tornadoes can occur at any time of year. They tend to occur in the afternoons and evenings: over 80 percent of all tornadoes strike between noon and midnight.

The intensity of tornadoes is given by the Fujita - Pearson Tornado Scale (also known simply as Fujita scale). The intensity can be derived directly with high resolution Doppler radar wind speed data, or empirically derived from structural damage compared to engineering data. Also, note that intensity does not refer in any way to the size, or width, of a tornado.

internet resources

Pictures of Tornadoes
A great selection of educational pictures, including pictures of tornadoes..
classroomclipart.com/cgi-bin/kids/imageFoli...

Australian Tornadoes
Australian tornadoes. Tornado photographs from Australia Severe Weather by Michael Bath and Jimmy Deguara, Sydney, Australia.
australiasevereweather.com/tornado.htm

What is a Tornado?
Video. Tornadoes are one of nature’s most powerful forces -- see where they come from, how fast they go, and how scientists study them
https://www.youtube.com/watch?v=-s3UwOq1P1E

Tornado Fact Sheet for Kids
Fact sheet for youth about what to do before, during, and after a tornado.
https://www.fema.gov/media-library-data/a4ec63524f...

Get Weather Ready: During a Tornado
US National Weather Service Video. If your area is under a tornado warning, would you know what to do to stay safe?
https://www.youtube.com/watch?v=_5TiTfuvotc

The Fujita Scale of Tornado Intensity
The Fujita Tornado Intensity Scale is used to rate the intensity of a tornado by examining the damage caused by the tornado after it has passed over a man-made structure
tornadoproject.com/fujitascale/fscale.h...

Hurricane vs. Tornado: What's the difference?
Video explaining the difference between a hurricane and tornado.
https://www.youtube.com/watch?v=W0LskBe_QfA

Nature's Most Violent Storms
Although tornadoes occur in many parts of the world, these destructive forces of nature are found most frequently in the United States east of the Rocky..
nssl.noaa.gov/education/svrwx101/tornad...

Tornado Photographs
A great selection of tornado photographs.
k5kj.net/noframe.htm#Events

How do tornadoes form?
Video explaining how tornadoes form.
https://www.youtube.com/watch?v=lmWh9jV_1ac

weather.com - safety - tornado
One of the most alarming aspects of these phenomena is their randomness, almost as if they had vindictive personalities..
weather.com/safety/tornadoes/tornadoes-...

Tornado Images
Images of 32 different shapes, sizes and colors
chaseday.com/tornadoes.htm

Kansas Tornado Chasers Home Page
Photos, history, & video clips of Kansas tornadoes, along current weather.
tornadochaser.com/

Tornado Facts for Kids!
Video.See real tornadoes form from giant thunderstorms and learn everything you need to know about these amazing storms
https://www.youtube.com/watch?v=vH4YT9secVw

Tornadoes - Natures Most Violent Storms
nssl.noaa.gov/NWSTornado/

Hurricane vs. Tornado: What's the difference?
Video explaining the difference between a hurricane and tornado.
https://www.youtube.com/watch?v=W0LskBe_QfA

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