Final answer:
Tornadoes can have wind speeds reaching up to 500 km/h, originating from the rotational motion of air in severe thunderstorms known as supercells.
Step-by-step explanation:
The wind speed of tornadoes in the Northern Hemisphere can reach up to 500 km/h. Tornadoes are associated with rotational motion and originate from severe thunderstorms, particularly supercells, which can have a column of air rotating around a horizontal axis.
This rotation can shift to a vertical axis due to wind speed differences in the atmosphere, leading to the formation of a tornado with a narrow, funnel-like shape. The rotational motion is more intense at the bottom of the funnel, where the wind speeds are the highest.