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World 2 · Tornadoes · 12 min · PRO

The Enhanced Fujita scale: rating damage, not wind

Why a tornado is rated after it is gone

PRO · Storm Chaser

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  • The supercell recipe: fuel, lift and spin
  • How a tornado forms: tilting a rolling tube
  • Tornado myths and facts
  • Charging a cloud: where lightning begins
  • The flash: leader and return stroke
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