Tornadoes

 

  • Origen: A rotating column of air (visible condensation funnel); from cumulonimbus cloud to earth surface
    • Twister
    • Cyclone (a closed low pressure circulation)
  • Trigger: Cumulonimbus cloud, strong winds and heavy rain, or nothing at all
  • Behavior: Medium fast onset and difficult to get away
  • Place: All areas; Common in “Tornado Alley” in USA, but can occur basically everywhere.
  • Other: It is possible to predict potential risk, and estimate the onset
    • Criteria for a tornado is that the vortex is in contact with ground and cloud base
    • Not all tornados are visible
    • Description:
      • Normal: speed 177 km/h, 80 m across and travels some kilometers before dissipating
      • Extreme: speed 480 km/t, 4 km across and travels more than 100 km
    • Scales:
      • The Fujita scale rates damages from tornados; 0-5.
      • The Torro scale rates tornados: 0-11.
    • Detail: Low pressure due to high wind speed and extreme rotation condense water into clouds; creating the funnel cloud
    • Precaution:
      • Creating a cloud of debris and dust
      • The condensation funnels narrow end that touches the ground and create damage
      • Careful with debris and dust
    • Closedown of Society: Fast and short lasting

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