1. Hurricanes Chapter 17 Sections 2 & 3 Pages 567-582 Chapter 17 Sections 2 & 3 Pages 567-582

2. Hurricanes A tropical storm that has winds of 119km/h or higher. Typically 600km in diameter. Hurricane season- June 1 – Nov 30. –Western Pacific- typhoon. –Indian Ocean- cyclone.

3. How Hurricanes Form Begins over warm water as a low-pressure area, or tropical disturbance. If it grows in size and strength it becomes a tropical storm, which may become a hurricane.

4. How Hurricanes Form A hurricane gets energy from warm, humid air at the ocean surface. As the air rises, and forms clouds, more air is drawn in. Winds spiral inward towards the area of low pressure.

5. How Hurricanes Form Inside the storm: –Bands of heavy rain –high winds up to 320km/h –The lowest air pressure –Warmest temperature. The lower the pressure –The stronger the winds blowing towards the center.

6. The Eye of the Hurricane A ring of clouds surrounding a quiet “eye”. Winds get stronger as the eye approaches. Weather in the Eye –Calm –Clear sky.

7. How Hurricanes Move Hurricanes in the Atlantic Ocean are steered by Easterly trade winds. Once it passes over land, the warm, moist air from the ocean is cut off. –The hurricane slows down –Loses strength. –Leaving heavy rainfall behind.

8. Hurricane Damage Hurricanes uproot trees, smash buildings, and destroy power lines. Heavy rains flood roads.

9. Hurricane Damage Storm surge- most dangerous features of a hurricane. –A “dome” of water that comes on shore with the hurricane that is formed by the high winds and the low pressure. –Up to 6m above sea-level –Water comes ashore with the hurricane –Washes away beaches, and destroys buildings.

10. Hurricane Safety Advances in communications and satellites have made tracking hurricanes easier and have made them less deadly.

11. Hurricane Safety A hurricane watch- conditions are possible with in the next 36 hours. –Evacuate- move away temporarily. A hurricane warning- conditions are expected within 24 hours. –Leave immediately. –If in a house, move to the interior away from windows. Storm Menu