1. Severe Weather 16-3 Pgs. 434-439 3/29/16 IN: What kinds of storms cause the most damage?

2. TERMS AND OBJECTIVES Terms: Terms: Thunderstormlightningthunder tornadohurricane Objectives: Objectives: Explain what lightning is. Explain what lightning is. Describe the formation of thunderstorms, tornados, and hurricanes. Describe the formation of thunderstorms, tornados, and hurricanes. Describe the characteristics of thunderstorms, tornados, and hurricanes. Describe the characteristics of thunderstorms, tornados, and hurricanes.

3. Severe Weather Weather that can cause property damage and even death. Weather that can cause property damage and even death. Thunderstorms Thunderstorms Tornadoes Tornadoes Hurricanes Hurricanes

4. Thunderstorms Thunderstorms are small, intense weather systems that produce: Strong winds Heavy rain Lightning Thunder

5. What causes thunderstorms? Thunderstorms occur when warm, moist air rises rapidly in an unstable atmosphere. Thunderstorms occur when warm, moist air rises rapidly in an unstable atmosphere. Usually at a cold front. Usually at a cold front.

6. Lightning Lightning is a large electrical discharge that occurs between two oppositely charge surfaces.

7. What causes lightning? Lightning is actually just static electricity on a much larger scale. Lightning is actually just static electricity on a much larger scale. The rubbing is caused by air moving around The rubbing is caused by air moving around

8. Thunder Thunder is the sound that results from the rapid expansion of air along the lightning strike.

9. Thunder When the lightning flash happens it heats the air to a temperature 5 times hotter than the surface of the sun. When the lightning flash happens it heats the air to a temperature 5 times hotter than the surface of the sun. This causes nearby air to expand and vibrate forming the sound we hear as thunder. This causes nearby air to expand and vibrate forming the sound we hear as thunder.

10. Interesting facts Lightning bolts can travel at speeds of up to 60,000 miles per second. Lightning bolts can travel at speeds of up to 60,000 miles per second. Every second around 100 bolts of lightning strike the Earth. Every second around 100 bolts of lightning strike the Earth. One lightning bolt has enough electricity to power 200,000 homes. One lightning bolt has enough electricity to power 200,000 homes. You are more likely to be struck by lightning than be eaten by a shark. You are more likely to be struck by lightning than be eaten by a shark.

11. Some myths Lightning never strikes in the same place twice. Lightning never strikes in the same place twice. False, the Empire State Building is reportedly struck 100 times a year. False, the Empire State Building is reportedly struck 100 times a year. Wearing rubber shoes will protect me in a thunder storm. Wearing rubber shoes will protect me in a thunder storm. False, Lighting is too powerful to be stopped by half an inch of rubber or several hundred feet of rubber for that matter. False, Lighting is too powerful to be stopped by half an inch of rubber or several hundred feet of rubber for that matter.

12. Tornadoes A tornado is a small, rotating column of air that has high wind speeds and low central pressure and that touches the ground.

14. Twists of Terror Although most tornadoes last only a few minutes, they can cause a lot of damage. Although most tornadoes last only a few minutes, they can cause a lot of damage. This is due to their strong spinning winds. This is due to their strong spinning winds.

15. Hurricanes A hurricane is a large, rotating tropical weather system with wind speeds of at least 119 km/h.

16. Hurricanes Hurricanes are the most powerful storms on Earth. Hurricanes are the most powerful storms on Earth. Hurricanes have different names in other parts of the world. Hurricanes have different names in other parts of the world. Typhoons - western Pacific Ocean Typhoons - western Pacific Ocean Cyclones - over the Indian Ocean Cyclones - over the Indian Ocean

19. Hurricane Damage While high winds cause a great deal of damage, most hurricane damage is caused by flooding associated with heavy rains and storm surges. While high winds cause a great deal of damage, most hurricane damage is caused by flooding associated with heavy rains and storm surges.

21. Storm Surge A storm surge is a wall of water that builds up over the ocean due to the heavy winds and low atmospheric pressure. A storm surge is a wall of water that builds up over the ocean due to the heavy winds and low atmospheric pressure.

23. OUT: What causes the most damage during a hurricane? OUT: What causes the most damage during a hurricane?