What is a Hurricane?
A counter-clockwise moving storm that forms in large bodies of water A storm with winds > 74 mph
Other names for Hurricanes: Typhoon, Cyclone
Anatomy of a Hurricane
Eye: 12-30 miles in diameter; warm with light winds
Eye wall: Wall of storm and high winds surrounding the eye
Storm Surge: High waves/tides caused by a hurricane
Rise in sea level leads to floods and fatalities
Dirty Side: Bottom right corner of the hurricane
Where are Hurricanes?
Coastal areas of the Atlantic, Pacific and Indian Oceans
When are Hurricanes?
Atlantic: June 1 – November 30
Pacific: May 15 – November 30
How do Hurricanes Form?
Hot water evaporates rapidly tropical waters
Warm water vapor rises quickly creating a low pressure system
Tropical Wave – Low pressure system
Tropical Disturbance – weather system with clouds and precipitation is organized and maintains for 24 hours
Tropical Depression – weather system with maximum winds of 38 mph
Tropical Storm – weather system with maximum winds of 73 mph How do you know a Hurricane is coming?
The Hurricane Center tracks, predicts the path and prepares people for hurricanes
Hurricane Watch – a hurricane is expected to come on shore within 36 hours
Hurricane Warning – a hurricane is expected to come on shore within 24 hours
How are Hurricanes Classified?
Saffir-Simpson Hurricane Damage Potential Scale
Category| Wind Speeds| Storm Surge| Damage|
1| 74-95 mph| 4-5 ft| Some damage to unanchored mobile homes, shrubs, trees| 2| 96-110 mph| 6-8 ft| Major damage to mobile homes, roofs, trees| 3| 111-130 mph| 9-12 ft| Destroys mobile homes, trees, damage to small buildings| 4| 131-155 mph| 13-18 ft| Completely destroys mobile homes, flooding| 5| > 155 mph| >18 ft| Extensive damage to buildings, severe flooding|
* Massive destruction
* Tornadoes and Flooding
* Billions of dollars in damage