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World 2 · Tornadoes · 14 min · PRO

How a tornado forms: tilting a rolling tube

From horizontal spin to vertical spin

PRO · Storm Chaser

World 2: Tornadoes is part of PRO

The first world of Storm Chaser is free. PRO opens the other 22 lessons in 6 worlds — simulations, quizzes and all.

  • The supercell recipe: fuel, lift and spin
  • The Enhanced Fujita scale: rating damage, not wind
  • Tornado myths and facts
  • Charging a cloud: where lightning begins
  • The flash: leader and return stroke
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  • All 60 labs — every world, every lesson
  • Practice exams and certificates

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