COOL
LINK
Tornado
Twister destruction
What is in the book?
Chapter: Violent Weather
Wind
Cyclones/hurricanes
Tornados
Thunderstorms
Lightning
Floods
Global Warming
A tornado is a revolving column of air in a funnel-shaped cloud extending from the base of a cumulonimbus (thunderstorm cloud) to the ground. The entry to the funnel is only a few hundred metres wide but contains destructive winds with speeds exceeding 320km/h. The same phenomenon over water is called a waterspout.
While tornadoes occur worldwide, the US holds the record with 1,297 in one year (1992). Australia is second with several hundreds per year, but a sparse population prevents an accurate count. The plains of China and Argentina are also a favourite breeding ground for tornadoes. Waterspouts frequently cross the coast and develop into tornadoes in many coastal and island nations.
