![]() ![]() It most likely reached its present form through a combination of the Spanish tronada and tornar ("to turn") however, this may be a folk etymology. This in turn was taken from the Latin tonare, meaning "to thunder". The word "tornado" is an altered form of the Spanish word tronada, which means "thunderstorm". ![]() Other areas which commonly experience tornadoes include New Zealand, western and southeastern Australia, south-central Canada, northwestern Europe, Italy, south-central and eastern Asia, east-central South America, and Southern Africa. This is mostly due to the unique geography of the country, which allows the conditions which breed strong, long-lived storms to occur many times a year. They have been observed on every continent except Antarctica however, a significant percentage of the world's tornadoes occur in the United States. However, some tornadoes can have winds of more than 300 mph (480 km/h), be more than a mile (1.6 km) across, and stay on the ground for dozens of miles (more than 100 kilometers). Most have winds of 110 mph (175 km/h) or less, are approximately 250 feet (75 meters) across, and travel a few miles (several kilometers) before dissipating. Often, a cloud of debris encircles the lower portion of the funnel. ![]() Tornadoes can come in many shapes, but are typically in the form of a visible condensation funnel, with the narrow end touching the earth. The lower half of this tornado is surrounded by a dust cloud, kicked up by the tornado's strong winds at the surface.Ī tornado is a violently rotating column of air which is in contact with both a cumulonimbus (or, in rare cases, cumulus) cloud base and the surface of the earth. The tornado itself is the thin tube reaching from the cloud to the ground. ![]()
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