Fujita scale
The fujita tornado intensity scale is used to rate the intensity of a tornado by examining the damage caused by the tornado after it has passed over a man-made structure
http://www.tornadoproject.com/fujitascale/fscale.htm
Ocean Weather
Ocean Weather
http://www.oceanweather.com/index.html
Tornado's in Europa
Tornado's in Europa
http://www.torro.org.uk/