Unformatted text preview: • Wind speeds up to 100 m/s (225 mph). Prerequisites for tornado formation: **Mass of very warm air at the surface **Strong westerly flow aloft **Unstable vertical temperature structure **Mechanism present to start rotation wind shear Change in wind speed and direction causes a rolling action Strong updrafts tilt the rotating air axis vertical. Provides the initial rotation within the cloud interior....
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- Spring '10
- Geography, dense cumulonimbus cloud, Extremely low air, intense low pressure, intense wind vortex