A thunderstorm is, as the name implies, a cloud or cluster of clouds that produces thunder, lightning, heavy rain, and
sometimes hail and tornadoes. This dangerous mix of weather requires great amounts of energy from the atmosphere. This energy is released when saturated air rises rapidly and high into the atmosphere. For this reason, thunderstorms are associated with tall cumulonimbus clouds that form when air rises or is lifted from the surface.

This lesson deals with understanding thunderstorms. Avoiding thunderstorms is wise when flying. The objective of this weeks lesson is to learn about thunderstorms, how they form, the different types a some climatology.

1. Describe the different types of thunderstorms and the weather conditions that lead to
   their formation.
2. Characterize the different stages of the life cycles of thunderstorms and tornadoes.
3. Identify likely areas for the occurrence of various types of severe thunderstorm weather

• Read the Chapter 9.
• Review the summary material under Lesson Content. This summarizes some of the most important concepts of these chapters.
• Do the Learning Activities to prepare you for this weeks quiz.

The reading should take about one hour to 90 minutes. The practice exercise should take about 20 to 30 minutes and the quiz 20 minutes.