Wednesday, February 15, 2012

hurricanes and tornadoes

Tornadoes:
  • they are often reffered as a twister or cyclone
  • a dangerous, violent rotataing column of air that is in contact with both the surface of the earth and a cumulonimbus cloud
File:Dszpics1.jpg

  • tornadoes come in many shapes and sizes but are typically in the form of a visible condensation funnel whose narrow end touches the ground destroying everything in its path
  • is often encircled by debris and dust
  • the most extreme tornadoes can attain wind speeds of more than 300mph
  • some types of tornadoes includes landspouts, waterspouts, multiple vortex tornado

      File:1957 Dallas multi-vortex 1 edited.JPG
      multiple vortex tornado
      
      waterspout
      
      landspout
        • less common in high lattitudes, frequently developed in tropical areas close to the equator
        • tornadoes have been observed in every continent except Antartica
      Hurricanes:
      • a storm system characterized by a low-pressure center and numerous thunderstorms that produce strong winds and heavy rain

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