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How does a hurricane form?
Quick answer
A hurricane forms over warm ocean water, which evaporates and feeds rising, spinning storm clouds. As the moist air rises and condenses, it releases heat that powers ever-stronger winds, building a giant rotating storm with a calm eye at its center.
Step by step
- Warm ocean water (above about 26°C) evaporates and fuels the storm.
- Rising moist air condenses, releasing heat that drives stronger winds.
- Earth's rotation makes the whole system spin.
- A calm, clear 'eye' forms at the center, ringed by the fiercest winds.
- It weakens over land or cool water, losing its warm-water fuel.
People also ask
What powers a hurricane?
Heat from warm ocean water: as evaporated moisture rises and condenses, it releases energy that intensifies the winds.
Why does a hurricane have a calm eye?
Air sinks at the very center, clearing clouds and calming winds, while the surrounding 'eyewall' holds the storm's strongest winds.
Why do hurricanes weaken over land?
They're fueled by warm ocean water; over land they lose that moisture source and friction slows their winds.
What conditions are needed for a hurricane?
Warm ocean water, moist air, and low wind shear — plus Earth's rotation to set it spinning.
Why do hurricanes have an eye?
Air sinks at the center of the spinning storm, creating a calm, clear zone surrounded by the strongest winds.
Part of the guide: Water & Weather Phenomena →