The History, Structure, Development, and Destruction

Violent cyclonic storm that develops in the tropical region

Wind speeds are > 74 mph

In which direction does a hurricane rotate?

Counterclockwise

Is the barometric pressure inside the hurricane high or low?

Low

June1st through November 31st

Provides weather information, such as data from satellites

Responsible for issuing watches and warnings to the media and general public

What is the difference between a Hurricane Watch and a Hurricane Warning?

◦Watch – Tropical storm poses a threat to coastal areas with 36 hours

◦Warning - Tropical storm conditions are expected in a coastal area within 24 hours

Warm ocean temperatures (>80˚ F) up to 60m deep

Little to no wind shear Low pressure system

at least 5˚ North or South of Equator

Rotation caused by winds

Heat Energy evaporating from the ocean surface

Tropical DisturbanceGroup of thunderstorms in the tropics

that are present for at least 24 hours

Tropical Wave lack of circulation, winds <25 mph and

every direction

Tropical Depressionclosed circulation but disorganized,

winds at least 25 mph

Tropical Storm Shower and thunderstorm moves over

closed circulation, winds greater than 39 mph

HurricaneEye is developed, winds > 74 mph

Wind Speed

Barometric Pressure

Saffir-Simpson Scale

Category Max Wind Speed(mph)

Min. Surface Pressure (mb)

Storm Surge m (ft)

1 74-96 > 980 1-1.7 (3-5)

2 97-111 979-965 1.8-2.6 (6-8)

3 112-131 964-945 2.7-3.8 (9-12)

4 132-155 944-920 3.9-5.6 (13-18)

5 > 155 < 920 > 5.7 (>19)

WindsFloodingStorm Surge

Large wall or dome of water that rushes into the coastline as a result of a hurricane making landfall

To the right are the areas affected by high storm surges

Strong vertical winds Cold water Movement over land

Friction Lack of moisture

1. Hurricane Andrew – 19922. Hurricane Hugo – 19893. Hurricane Fran – 19964. Hurricane Opal – 19955. Hurricane Frederic - 1979

Damage is a result of development

There are more developed areas and possessions than in the past

1. Galveston – 19002. Southeast Florida – 19283. Florida Keys – 19194. New England – 19385. Florida Keys – 1935

Lack of instrumentation to predict and track storms

People were not warned of the incoming danger

Results of the Galveston Hurricane

Arthur Hanna Omar

Bertha Isidore Paloma

Cristobal Josephine Rene

Dolly Kyle Sally

Edouard Lili Teddy

Fay Marco Vicky

Gustav Nana Wilfred

Damage to your house from wind?

Damage from flooding?

Destroyed vacation house?

Damage to family members’ homes?

Mrs. Parker’s

Old House

Final Water Level

Flooding of Tar River as result of

Hurricanes Dennis and Floyd

DocksideTar RiverEstates

Extensive Flooding

Extended Power outages

Flood Related Deaths

Property Damage

US 264 Bridge

Listen to warnings Take all warnings seriously Follow evacuations Prepare Food and Water for extensive power outages

The End