Questions and Answers About Thunderstorms - Answers questions such as how thunderstorms are formed, how they're detected, and what type of damage they can do. - http://www.nssl.noaa.gov/primer/tstorm/tst_basics.html
FEMA: Thunderstorms - Contains background information and a thunderstorm factsheet. - http://www.fema.gov/hazard/thunderstorm/
Severe Thunderstorms in New South Wales - Contains information about the number of stroms a year experienced in this area, their warning system, and how to be safe. - http://www.bom.gov.au/weather/nsw/sevwx/
Thunder and Lightning - Explains what lightning and thunder are. - http://www.wxdude.com/page5.html
Wikipedia: Thunderstorm - Brief overview of thunderstorms and their life cycle. - http://en.wikipedia.org/wiki/Thunderstorm
Thunderstorms - Contains information on the formation of a thunderstorm, types of thunderstorms, and lightning and thunder. - http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/tstorm.html
Thunderstorms, Tornadoes, Lightning - Describes how these weather phenomenon are made in the atmosphere. - http://www.nws.noaa.gov/om/brochures/ttl.pdf
Severe Storms: Online Meteorology Guide - Includes the dangers and types of thunderstorms, plus information on tornados. - http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/svr/home.rxml
Thunderstorms and Tornadoes - Contains how thunderstorms are formed, with pictures of hail, lightning, and thunderclouds. - http://www.physicalgeography.net/fundamentals/7t.html
Thunder Storms and Lightning - Information on what thunderstorms are, how lightning is made, and how to be safe in a lightning storm. - http://www.co.honolulu.hi.us/ocda/thunder.htm
USAToday.com: Thunderstorms - Contains information on types of thunderstorms, lightning, and precipitation. - http://www.usatoday.com/weather/resources/basics/thunderstorms.htm
FEMA For Kids: Thunderstorms - Learn how thunderstorms form, and how they can be dangerous to you. - http://www.fema.gov/kids/thunder.htm