Extreme Weather-A Hurricane Is Born

By Katie and Ashley

vocabulary

CONDENSE:

To lose heat and change from a vapor or gas into a liquid. Moisture, or water vapor, in the air condenses to form rain.


TROPICAL DISTURBANCE:

a cluster of thunderstorms near the equator that moves with the prevailing winds.


TROPICAL DEPRESSION:

a storm near the equator with winds moving in a circle at speeds of up to 38 miles per hour.


TROPICAL STORM:

a storm near the equator with winds moving in a circle at speeds of 39 to 73 miles per hour.

Tropical disturbance and depression

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Hurricane

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  • hurricanes usually form off the coast of Africa where the temperature is at least 80 degrees F in the summer
  • As a tropical disturbance grows, more warm moist air rises from the ocean
  • this air in the northern hemisphere begins to circle in a counter clockwise direction as a consequence of the Coriolis effect
  • most tropical storms die out in time but some storms continue to grow in size and wind speed