. tornado. > Violently rotating column of air, which is also in contact with the ground and foundation of cumulonimbus or cumulus wypiętrzonego less. Tornadoes attain different sizes, but usually take the form of a visible condensation funnel, the narrow end touching the ground. The lower part of the funnel is often surrounded by a cloud of debris and dust. Tornadoes have been observed on every continent except Antarctica, but most tornadoes per year recorded in the United States. Most tornadoes have wind power is not greater than 180 km / h and width of the funnel up to 75 meters and is in contact with the ground long enough to traverse several kilometers, but some attain wind speeds over 480 km / h, width of 1.5 kilometers, and sink traverse 100 km to the ground. The strength of tornadoes is measured in the Fujita scale. Most of the most devastating tornadoes formed in the storm clouds called superkomórkami. In Polish terminology tornado is called a tornado.