Close supervision is strongly recommended when students are conducting searches on the Internet. Inappropriate sites are easy to access either by mistake or on purpose. Explain how tornadoes and hurricanes are classified.
All types can occasionally become severe.
A tornado can produce the highest wind speeds known. This swirling column of air is usually associated with a severe thunderstorm, though its location beneath the storm can vary. A worldwide phenomenon, tornadoes occur most often in the United States. From 1953 through 1989, about 27,000 tornadoes were documented in the United States. Tropical cyclones .