Satellite view of a rotating hurricane, showing swirling cloud bands and a defined central eye.

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Go inside the eye of the storm.
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Transcript

NARRATOR: One of the most intense storms on earth is the hurricane. It involves high-speed winds that circulate about a central core of low pressure. An average hurricane lasts more than a week.

This view, taken from weather satellite photographs, shows the typical hurricane structure in the Northern Hemisphere. At the center of the storm is the low-pressure core, a region of relative calm that is often free of clouds and is known as the eye of the storm. In the high-rising wall of clouds that encircles the eye, the hurricane's most ferocious wind and weather conditions are found. Spiraling counterclockwise around this eye wall are bands of rain clouds that give the hurricane an average diameter of more than 300 kilometers. Here, the high-level outflow from the storm can be seen rotating in a direction opposite that of the rain clouds.

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