Natural Phenomenon ( Tornado)

TORNADO

 Tornado is aviolently rotating column of air that extends from a thunderstorm to the gorund. It's often portended by a dark, greenish sky. Black storm clouds gather. Tornado is one of the most violent event in the world and it always cause at the United States, for Indonesia tornado is one of the rare phenomenal events because of the wet tropical climates. 

And now it's tornado fact time :
  • A tornado forms when changes in wind speed and direction create a horizontal spinning effect within a storm cell. This effect is then tipped vertical by rising air moving up through the thunderclouds.
  • Funnels typically grow about 660 feet (200 meters) wide.
  • Tornadoes move at speeds of about 10 to 20 miles (16 to 32 kilometers) per hour, although they've been clocked in bursts up to 70 miles (113 kilometers) per hour. Most don't get very far, though. They rarely travel more than about six miles (ten kilometers) in their short lifetimes.
  • Tornadoes are classified as weak, strong, or violent storms. Violent tornadoes comprise only about two percent of all tornadoes, but they cause 70 percent of all tornado deaths and may last an hour or more.
  • People, cars, and even buildings may be hurled aloft by tornado-force winds—or simply blown away. Most injuries and deaths are caused by flying debris.
The most violent tornadoes come from supercells, large thunderstorms that have winds already in rotation. About one in a thousand storms becomes a supercell, and one in five or six supercells spawns off a tornado.Tornado season begins in early spring for the states along the Gulf of Mexico. The season follows the jet stream—as it swings farther north, so does tornado activity. May generally has more tornadoes than any other month, but April's twisters are usually more violent.

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