Science
How do hurricanes form?
A hurricane forms over warm ocean water, which evaporates and rises, releasing heat that powers the storm. As more warm, moist air spirals upward and Earth's rotation twists it, winds intensify into a giant rotating system with a calm eye at its center.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how hurricanes works.
Step by step
- 1They form over warm ocean water (around 26°C or higher).
- 2Rising warm, moist air releases heat that fuels the storm.
- 3Earth's rotation makes the storm spin.
- 4A calm 'eye' forms at the center of the swirling winds.
Frequently asked questions
- 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.
- Why do hurricanes weaken over land?
- They lose their fuel — warm, moist ocean air — so they quickly fade once they move inland.