Weather Maps
Provides links to weather forecasts and satellite images on the Internet.
Tornadoes (at the Whyfiles)
Find out how a tornado forms. What causes a tornado and how to predict tornados
National Hurricane Center
Contains current and historical hurricane and cyclone information.  There are also links to aircraft reconnaissance sites.
Tornado Project Online
In-depth information, data, and videos on tornadoes. Some information includes FAQs, top tens, stories, and safety.
NASA Earth Observatory

The Earth Observatory’s mission is to share with the public the images, stories, and discoveries about climate and the environment that emerge from NASA research, including its satellite missions, in-the-field research, and climate models.