1. HURRICANES

2. Ingredients for a hurricane to form: 1. Water temperature 80 ° or more. 2. Surface level low pressure 3. Upper level high pressure. L H

3. So what would cause a hurricane to weaken? If the hurricane moves into colder water. If the hurricane moves over land.

4. Development 1. Tropical Wave: a large, unorganized area of rain. No symbol. 2. Tropical Depression: a storm spinning counterclockwise with winds <39 mph. –Symbol is: L

5. Development Tropical Storm: a storm spinning counter clockwise with winds between 39 and 73 mph. Symbol:

6. Development Hurricane: a storm spinning counter clockwise with winds > 74 mph. Symbol:

7. Parts of a hurricane

8. Eye – the calm, low pressure center of a hurricane. 5-30 miles wide. Eye wall – the dense wall of thunderstorms surrounding the eye. –The strongest and most intense part of a hurricane.

9. Parts of a hurricane Rain bands – the spiral bands of clouds surrounding the eye wall. –The largest part of a hurricane

11. Storm Surge Storm surge – large surge of water near the coast. This causes the most damage!

12. Saffir Simpson Scale The scale to measure hurricanes is call the Saffir Simpson Scale. Category 1 is the weakest. Category 5 is the strongest: winds > 157 mph. Hurricane season is from June to October. See the attached scale.

13. Saffir-Simpson Scale Wind Speeds

14. Saffir Simpson Scale

15. 2012 Hurricane Names Alberto Beryl Chris Debby Ernesto Florence Gordon Helene Isaac Joyce Kirk Leslie Michael Nadine Oscar Patty Rafael Sandy Tony Valerie William

16. Hurricane Katrina – 2005 Category 5 (hit U.S. as a category 4)

17. Only 3 Category 5 hurricanes have ever hit the United States. 1.1935 Florida Keys Labor Day Hurricane 2.1969 Hurricane Camille 3.1992 Hurricane Andrew