tornado
Tornado, also known as tornado, curl, is a very violent weather phenomenon, formed by the rapid rotation and the formation of upright hollow tubular air. Tornado sizes are different, but the shape of the general are on the big funnel-like, "funnel" on the plot rain clouds (very few cases for the cumulus), the lower part of the general contact with the ground and often surrounded by dust or debris wreckage The Most tornadoes are about 75 meters in diameter and winds are between 64 and 177 kilometers per hour, sweeping thousands of meters. There are some tornado wind speed can be more than 480 km per hour, up to 1.6 km in diameter, the movement path of more than 100 km. Although every continent except Antarctica has a tornado, but the United States suffered more than any country or region tornado. In addition, tornadoes are often found in southern Canada, central and southern Asia, eastern and southern parts of South America, southern Africa, northwestern and southeastern Europe, and western and southeastern Australia and New Zealand. Taiwan, although the tornado is rare, but according to meteorologists, Khan South because of the plain terrain, an average of two years will appear a tornado. In May 12, 2011 Xinbei City, the new store also occurred in a small tornado. July 19, 2014 Pingtung County in Hong Kong occurred as high as 50 meters of the dragon tornado. ...