Web Weather for Kids http://www.eo.ucar.edu/webweather/
Forces of Nature http://environment.nationalgeographic.com/environment/natural-disasters/forces-of-nature.html
Dan's Wild Wild Cloud Gallery http://www.wildwildweather.com/clouds.htm
Tornadoes: Natures Most Violent Storms http://www.nssl.noaa.gov/edu/safety/tornadoguide.html