Lots More Information Related Articles How Tornadoes WorkWhat is it like in the eye of a tornado?How Hurricanes WorkHow the Tornado Intercept Vehicle WorksHow Radar WorksHow Emergency Power Systems Work More Great Links Storm Chaser World Home PageStorm Chasers: Discovery ChannelTwister Sisters Sources Frankel, Leora; Turk, Byron; Timmer, Reed. Storm Chasers Blog. http://blogs.discovery.com/storm_chasers/Metz, Melanie & Willenberg, Peggy. "The Twister Sisters." http://www.twistersisters.com/bios.htmNational Severe Storms Laboratory. "Tornadoes…Nature's Most Violent Storms." http://www.nssl.noaa.gov/edu/safety/tornadoguide.htmlNational Severe Storms Laboratory. "U.S. Totals." http://www.nssl.noaa.gov/edu/safety/guideimg/pic13.jpgRosenfeld, Jeffrey. Eye Of The Storm: Inside The World's Deadliest Hurricanes, Tornadoes, And Blizzards. Basic Books (July 3, 2003).Trueit, Trudi Strain. Storm Chasers. Franklin Watts (September 2002)World Book. Tornadoes. World Book (August 2007)