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Severe Weather

Severe Weather. Chapter 2, Lesson 3. Thunderstorms.  It is a heavy storm that consists of rain, strong winds, lightning, and thunder.  Thunderstorms occur along cold fronts. The two atmospheric conditions required to produced thunderstorms are: 1. Warm and moist air

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Severe Weather

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  1. Severe Weather Chapter 2, Lesson 3

  2. Thunderstorms  It is a heavy storm that consists of rain, strong winds, lightning, and thunder.  Thunderstorms occur along cold fronts. The two atmospheric conditions required to produced thunderstorms are: 1. Warm and moist air 2. Unstable conditions “surrounding air is colder than the rising air mass”

  3. Lightning  It is an electric discharge that occurs between two oppositely charged surfaces. 2 3 1

  4. lightning • When lightning strikes, energy is released. • Thunder is the sound that results from the rapid expansion of air along lightning strike.

  5. Severe thunderstorms • They can produce one or more of the following conditions: • high winds, hail, floods, tornadoes. • Hailstorms damage crops and can break windows. • Floods that result from heavy rains cause large damages and cause weather-related deaths. • Lightning is the reason for starting forest fires and to killing or injuring people.

  6. Tornadoes • Tornado is a destructive, rotating column of air that has high wind speeds and low central pressure and that touches the ground. It is visible as a funnel-shaped cloud. • Tornado is destructive due to the strong spinning winds; which have an average speed of 120-180 km/h.

  7. Hurricanes • Hurricane is a severe storm that develops over tropical oceans and whose winds spiral in toward intensely low-pressure storm center in a speed of at least 120 km/h. • Hurricanes vary in size from 160 to 1500 km in diameter and can travel for thousands of kilometers.

  8. Hurricane structure • Eye • Eye wall • Rain bands

  9. Damages caused by tornadoes and hurricanes • Tornadoes can cause a lot of damage. They can uproot trees, destroy buildings, or picking up heavy objects as cars. • Hurricanes can also knock down trees and destroy buildings and homes. Most damage is caused by flooding associated with heavy rains.

  10. Severe weather safety • Lightning is attracted to the tall objects. So, stay away from trees, and crouch down if you are in an open area. Stay away from water. • If there is a tornado, find shelter quickly, best is a basement or the center of a windowless room.

  11. Severe weather safety • 3. If there is a flood, find a high place to wait out the flood, and stay away from flood waters. • 4. If there is a hurricane, people living on the shore will be asked to evacuate the area. • Also, you should stay indoor during the storm.

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