Severe weather formation


  • Cumulus stage: thunderstorms need warm unstable air to be formed. On stage 1, warm air rises and cumulus cloud grows bigger.
  • Mature stage: when cloud gets a very large amount of water, precipitation occurs (rain, hails).
  • Dissipating stage: precipitation cools clouds down and storm dies.


Tornados start out as a thunderstorm.

  • Warm air rises.
  • Air begins to rotate and it's called a mesocyclone.
  • All the air starts to roll, creating a vortex.

Scale of measurement: Fujita Scale (EF#).


Unlike thunderstorms and tornados, hurricanes need warm water to be formed.

  1. It begins as a bunch of thunderstorms.
  2. The warm air that comes from the storm moves to the center and rises, creating clouds.
  3. These clouds form a ring called "eye wall".
  4. The ring spins and grows.
  5. But as soon storm goes into land, it dies. Why? Because the water from the ocean was its source of energy.

Scale of measurement: Saffir-Simpson scale.

Did you know that?


  • THUNDERSTORMS: there's up to 2,000 happening right now; about 45,000 a day, and in the United States about 100,000.
  • TORNADOS: about 770 per year in the United States.
  • HURRICANES: because they are the most violent storms on Earth, there is about 5 in the U.S and 85 world wide.

Hurricanes are also called typhoons or cyclones; and most of their damage come from the waves of water, called storm surge.

Yeah, probably you knew it.

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