WeatherNet Weather Net from the University of Michigan's Weather Underground is an exhaustive list of weather related links. Everything on the Web can be found here. There are special features, too. The Old Farmer's Almanac on-line. 5 day weather forecasts for US locations, current conditions, advice, Day in History, Weather History, astronomical data.
Some people actually chase tornadoes.
This is the location to get all the info on tornadoes. Textbooks Weather lessons on pressure, winds, reading weather maps, and a Storm Spotters Guide. Excellent material for meteorology. Part of the Electronic Textbook series from the University of Illinois. A complete cloud catalog with lessons on cloud formation, hurricanes, and tornadoes.