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Chapter 3 Weather Patterns Section 2 Storms PowerPoint Presentation
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Chapter 3 Weather Patterns Section 2 Storms - PowerPoint PPT Presentation


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Chapter 3 Weather Patterns Section 2 Storms. What Is A Storm?. A storm is a violent disturbance in the atmosphere. Thunderstorms. Thunderstorms are heavy rainstorms with thunder and lightning. Lightning. During a thunderstorm, positive and negative charges build up.

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Presentation Transcript
what is a storm
What Is A Storm?
  • A storm is a violent disturbance in the atmosphere.
thunderstorms
Thunderstorms
  • Thunderstorms are heavy rainstorms with thunder and lightning.
lightning
Lightning
  • During a thunderstorm, positive and negative charges build up.
  • Lightning is a sudden spark, or discharge, of these charges in one of 3 ways:
      • Within one cloud
      • From cloud to cloud
      • From cloud to ground
tornadoes
Tornadoes
  • A tornado is a rapidly whirling, funnel-shaped cloud that reaches down from a storm cloud to touch Earth’s surface.
how tornadoes form
How Tornadoes Form
  • Tornadoes develop in low, heavy, cumulonimbus clouds – the same clouds that bring thunderstorms.
  • Most likely to occur in spring and early summer, usually found in the middle of the U.S.
hurricanes
Hurricanes
  • A hurricane is a tropical storm with winds of 119 km/h or higher.
  • In the Pacific ocean, hurricanes are called typhoons.
how hurricanes form
How Hurricanes Form
  • A hurricane begins over warm water as a low-pressure area, or tropical disturbance.
  • If it grows in size and strength, it will become a tropical storm, which may then become a hurricane.
how hurricanes form1
How Hurricanes Form
  • A hurricane gets its energy from warm, humid air.
  • The southern Atlantic Ocean and the Gulf of Mexico provide the heat and moisture needed to feed a very large hurricane.
the eye of the hurricane
The Eye of the Hurricane
  • The center of the hurricane is a ring of clouds surrounding a quiet “eye.”
  • The winds get stronger as you get closer to the eye, but once you are in the eye, it calms down suddenly.
hurricane damage
Hurricane Damage
  • One of the most dangerous features of a hurricane is the storm surge.
  • A storm surge is a “dome” of water that sweeps across the coast where the hurricane lands.
lake effect snow
Lake-Effect Snow
  • When a continental polar air mass (cold and dry) crosses a body of water, it picks up moisture and gets a bit warmer.
  • This warm air rises, cools, condenses, and falls back down as snow.