1. Hurricanes

2. A tropical storm that has winds of 119 km ph or higher
Typically about 600 km across
In western Pacific are called typhoons
Bring much needed rainfall to S. Asia

3. How do they form? Atlantic Ocean (Hurricane season) June – November
Begins over warm water as L pressure or tropical disturbance
Becomes tropical storm and then hurricane
Tropical storm mph winds
Hurricane- 74 mph winds or higher

4. Where do they get energy?
Warm, humid air
Rises, forms clouds, more air is drawn into the system
Winds spiral inward toward low pressure
High winds near center with heavy rain
Lowest pressure and highest temps are at center
Lower the pressure the faster the winds
May be as strong as 320 km/hr

6. The Eye When the eye arrives, weather changes
Calm and sky may appear clear
After it passes, winds blow in clockwise direction
Center of the hurricane

7. Inside the eye of Hurricane Allen (1980)

8. How they move Usually a week or two
Atlantic Ocean = easterly trade winds
After crosses land, loses energy because no warm moist air

9. Hurricane damage High waves, severe flooding and wind damage
Most dangerous features
Storm surge
Low pressure and high winds raise level of water up to 6 meters (15 feet0
Storm surge – a dome of water that sweeps across the coast

11. Naming hurricanes
Each year, alphabetical list for hurricanes and tropical storms
One name for each letter except Q,U,X,Y,Z

12. Saffir-Simpson Scale 1-5 rating based on intensity
Estimate of potential property damage and flooding expected
Wind speed is determining factor