11) At what wind speed does a tornado become classified as an EF-5?
12) What is the weakest rating a tornado can receive?
13) Where is Tornado Alley located?
14) What is the cloud formation associated with a tornado?
15) What color is often associated with tornado lightning?
16) What type of weather fronts cause tornadoes to form?
17) What type of thunderstorms are most likely to produce tornadoes?
18) How long does a typical tornado last?
19) What type of windstorm is a tornado?
20) What is the Fujita Scale used to rate?