Why do hurricanes spin in different directions in the two hemispheres?
Quick Answer
The Coriolis effect, caused by Earth’s rotation, deflects moving air to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. That helps storms rotate clockwise or counterclockwise depending on where they form.
The Full Story
As air rushes toward a low-pressure center, Earth’s rotation bends the flow. In the Northern Hemisphere, that creates counterclockwise rotation around hurricanes, while in the Southern Hemisphere the rotation is clockwise. The storm still gets its energy from warm ocean water, but the spin direction comes from planetary physics. Near the equator, the Coriolis effect is too weak for hurricanes to form easily, which is why tropical cyclones are rare there.
Key Facts
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Suggested video title for this topic:
"Why do giant storms spin opposite ways on opposite sides of Earth?"