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Chapter 20 Section 3 Thunderstorms and Tornadoes

Chapter 20 Section 3 Thunderstorms and Tornadoes. Objectives: -Describe the conditions necessary for the formation of thunderstorms and tornadoes -Describe the hazards of thunderstorms and tornadoes, and discuss related safety measures. Thunderstorms:.

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Chapter 20 Section 3 Thunderstorms and Tornadoes

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  1. Chapter 20 Section 3Thunderstorms and Tornadoes Objectives: -Describe the conditions necessary for the formation of thunderstorms and tornadoes -Describe the hazards of thunderstorms and tornadoes, and discuss related safety measures

  2. Thunderstorms: • Storms with lightning, thunder, rain, hail • Only few kilometers in size • Cumulonimbus Clouds (see page. 396-399 and describe the features of this type of cloud) • Typically occur during the afternoon • Why? • Surface warming during the day causes air to become unstable

  3. Squall Lines • Thunderstorms that occur in lines ahead of fronts • Associated with heavy winds and rain. • Storms move slowly and can lead to flooding • What will temperatures do after this front passes?

  4. Radar Image of a Squall Line.What part of the country?

  5. Supercells • Very large single-cell thunderstorms with strong updrafts. • Can develop into tornadoes

  6. Look familiar?

  7. Lightning • Discharge of electricity from; • cloud to ground, • to another cloud, • or to another spot within the same cloud.

  8. Tornadoes • Rotating column of air can be associated with thunderstorms.

  9. What trend is represented?

  10. Fujita Tornado Intensity Scale

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