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UNIT

Tornadoes: Severe
Thunderstorms

Tornadoes: Severe ATR3-3-01

Thunderstorms

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A tornado is a type of violent windstorm in
which a rapidly rotating column of air spins very

fast. They are not very wide, and they do not last

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a long time. But they are very destructive and
even deadly.

tornado and lightning
Tornadoes typically develop within a large

scale low-pressure system. When unstable hot

air near the ground rises and meets cooler air,

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3
a thunderstorm forms . Sometimes a massive
ATR3-3-V01 thunderstorm develops a rotational wind that
touches the ground at high speed. This is a

Vocabulary

1 windstorm : a storm with very strong wind but little or no rain or snow
2 destructive : causing great damage
3 form : to give a particular shape to
12 4 massive : large and heavy