Explain why the speed of a whirl wind in a tornado is alarmingly high ?

Why the speed of whirl wind in a Tornado is alarmingly high?

Assertion : The speed of a whirl wind in a tornado is alarmigly high. Reason : If no external torque acts on a body, its angualr velocity remains constant.

The angluar speed of a whirlwind in a tornado towards the centre

Explain why the shapes of high-speed vehicles are streamlined ?