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Hurricanes.

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Presentation on theme: "Hurricanes."— Presentation transcript:

1 Hurricanes

2 What is a Hurricane The terms "hurricane" and "typhoon" are regionally specific names for a strong "tropical cyclone". A tropical cyclone is the generic term for a non-frontal synoptic scale low-pressure system over tropical or sub-tropical waters with organized convection (i.e. thunderstorm activity) and definite cyclonic surface wind circulation (Holland 1993).

3 Where do Hurricanes form Water needs to be at least 80F

4

5 How are Hurricanes Measured
Saffir-Simpson Scale

6 Why are Hurricanes Named
Tropical storms and hurricanes are given names to avoid confusion when more than one storm is being followed at the same time. A storm is named when it reaches tropical storm strength with winds of 39 mph. A storm becomes a hurricane when its wind speed reaches 75 mph. Separate sets of hurricane names are used in the central Pacific, eastern Pacific, and the Atlantic Basin, which includes the Caribbean Sea and the Gulf of Mexico. The World Meteorological Organization's Region 4 Hurricane Committee selects the names for Atlantic Basin storms. The names are English, Spanish and French - the languages spoken in the national Atlantic Basin storms hit. They alternate between male and female names. The group has selected six sets of names, which means each set of names is used again each six years.

7 Hurricane Diagram

8 Hurricane Destruction Storm Surge/Flooding/Wind


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