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20 3pp

  1. 1. 20.3 Severe Storms<br />Vocabulary<br />
  2. 2. Thunderstorm<br />Thunderstorm is produced by a cumulonimbus cloud and always accompanied by lightening and thunder.<br />
  3. 3. Tornado<br />A tornado is a small, very intense cyclone storm with exceedingly high winds, most often produced along cold fronts in conjunction with severe thunderstorms.<br />
  4. 4. Hurricane<br />Hurricane is a tropical cyclone storm having winds in excess of 119 kilometers per hour.<br />
  5. 5. Eye Wall<br />Eye wall is the doughnut-shaped area of intense cumulonimbus development and very strong winds that surrounds the eye of a hurricane.<br />
  6. 6. Eye<br />The eye is a zone of scattering clouds and calm averaging about 20 kilometers in diameter at the center of a hurricane.<br />
  7. 7. Storm Surge<br />Storm surge is the abnormal rise of the sea along a shore as a result of strong winds.<br />
  8. 8. Key Concepts<br />
  9. 9. A thunder storm is a storm that generates lightening and thunder<br />Thunderstorms frequently produce gusty winds, heavy rain, and hail.<br />
  10. 10. Thunder storms form when warm, humid air rises in an unstable environment.<br />
  11. 11. Tornadoes are violent windstorms that take the form of a rotating column of air called a vortex.<br />The vortex extends downward from a cumulonimbus cloud.<br />
  12. 12. Most tornadoes form in association with severe thunderstorms.<br />
  13. 13. Whirling tropical cyclones that produce winds of at least 119 kilometers per hour are known in the United States as hurricanes. <br />
  14. 14. Hurricanes develop most often in the late summer when water temperatures are warm enough to provide the necessary heat and moisture to the air.<br />

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