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The details of how and why tornadoes form and dissipate remain poorly understood. Most tornadoes last from a few seconds to a few minutes; only rarely do they last more than 10 minutes.

news.nationalgeographic.com/2015/05/150511-tornadoes-storms-midwest-weather-science

May 11, 2015 ... Tornadoes remain deadly and relatively unpredictable, despite recent advancements in weather science. Here's what scientists do know:.

.ask.com/youtube?q=Why+Do+Tornadoes+Form&v=lmWh9jV_1ac
Aug 19, 2014 ... View full lesson: http://ed.ted.com/lessons/how-do-tornadoes-form-james-spann Tornadoes are the most violent storms on Earth, with wind ...

www.eo.ucar.edu/kids/dangerwx/tornado3.htm

A funnel cloud is created. 3. The Funnel Rotates and Touches Down. The rain and hail in the thunderstorm cause the funnel to touch down creating a tornado.

www.weatherwizkids.com/weather-tornado.htm

How do tornadoes form? Most tornadoes form from thunderstorms. You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada. When these ...

scied.ucar.edu/shortcontent/how-tornadoes-form

A tornado can form where winds blow at different speeds causing rotation (A) ... A horizontal rotating column of air can form at the boundary between these two ... and do not necessarily reflect the views of the National Science Foundation.

www.universetoday.com/75695/how-do-tornadoes-form

Sep 18, 2016 ... The warm air eventually twists into a spiral and forms the funnel cloud that we all associate with a ... This is where the strongest tornadoes form.

www.cnn.com/videos/tv/2015/04/02/orig-how-tornadoes-form.cnn

Apr 2, 2015 ... CNN meteorologist Jennifer Gray explains how tornadoes form and why they are one of the most dangerous weather phenomena on Earth.

eschooltoday.com/natural-disasters/tornadoes/how-do-tornadoes-form.html

Here is simple step by step description of how a tornado develops.

www.scientificamerican.com/video/how-do-tornadoes-form2013-04-23

Oct 16, 2014 ... Every year tornadoes rip through the U.S. Midwest, leaving death, injury and billions of dollars of damage in their wake. Where do these ...