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www.weatherquestions.com/What_causes_tornadoes.htm

Brief, simplified description of how tornadoes form. ... direction (in the Northern Hemisphere), converges inward toward the thunderstorm, causing it to spin faster .

www.livescience.com/21498-tornado-facts.html

Apr 19, 2016 ... Tornadoes are violent storms that kill 80 people each year. Here are some facts about how they form and how to stay safe.

www.weatherwizkids.com/weather-tornado.htm

Tornado How do tornadoes form? Most tornadoes form from thunderstorms. ... widely recognized as tornadoes, they can cause comparable, and in some cases,  ...

wxguys.ssec.wisc.edu/2011/05/01/what-causes-tornadoes

May 1, 2011 ... To form a tornado, the host thunderstorm must also rotate. From below, a rotating cloud base looks like someone is stirring the storm from ...

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

Because wind is invisible, it is hard to see a tornado unless it forms a .... The rear flank downdraft is the motion in the storm that causes the hook echo feature on ...

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

May 11, 2015 ... How Tornadoes Form and Why They're so Unpredictable ... This happens when air descending from the supercell causes rotation near the ...

www.wunderground.com/resources/education/tornadoFAQ.asp

The truth is that scientists don't fully understand how tornadoes form. ... and the surrounding winds may cause the updraft to begin rotating-and a tornado is born.

.ask.com/youtube?q=What+Causes+A+Tornado+To+Form&v=ep2YY_D7wdk
Dec 12, 2013 ... A quick and fun cartoon lesson about tornadoes. Great for ... What Causes Tornadoes. The Science Bucket ... How do tornadoes form? - James ...

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

A tornado can form where winds blow at different speeds causing rotation (A) which can tighten and speed into a funnel cloud if caught in the flow of air moving  ...

www.conserve-energy-future.com/types-and-causes-of-tornadoes.php

Types and Causes of Tornadoes: A tornado is a strong, turbulent column of air, moving ... Tornadoes also occasionally occur in south-central and eastern Asia, ...