Tornadoes are one of the most severe types of weather phenomena. While many people fear tornadoes and their destructive power, few people understand their real causes and effects. They are not aware of how to protect themselves from their devastating force as well. Tornadoes, violently rotating columns of air, occur when a change in wind direction, coupled with an increase in wind speed, results in a spinning effect in the lower atmosphere. These whirling movements, which may not be visible to the naked eye, are accelerated when the spinning air column shifts from a horizontal to a vertical position. As the revolving cloud draws in the warm air that surrounds it at ground level, its spinning motion begins to accelerate, thereby creating a funnel that extends from the cloud above it to the ground below. In this way, tornadoes become suspended from low pressure storm clouds.

Tornadoes are outgrowths of powerful thunderstorms that appear as rotating, funnel-shaped clouds. They extend from a thunderstorm to the ground with violent winds that average 30 miles per hour. Also, they can vary in speed dramatically from being stationary to 70 miles per hour. With a loud roar that sounds similar to a freight train, tornadoes in the United States typically are 500 feet across and travel on the ground for five miles. Every state is at some risk from tornadoes and the severe storms that produce them.