Week 3 Lecture 2 - Week 3 Lecture 2 Naming Tropical...

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Week 3 Lecture 2 Naming Tropical CyclonesoReflect Geographic Region: Spanish, English, and FrenchoShort and Distinctive: Only 21 names (no Q, U, X, Y, Z)oM/F: AlternateoGreek Alphabet: Only used if we run out of namesoNames Repeat every 7th yearoTypical North Atlantic season: 10 named tropical cyclonesoIn a typical year, we make it to the letter "J"oIn 2005, there were 27 named storms, which forced the name list 6 letters deep into the Greek alphabet. The last named system of that year was Hurricane Zeta.Stages of Development and Size, Duration, and Strength1)Tropical Disturbancea)Cluster of tropical thunderstormsb)Watched or “investigated” for further development2)Tropical Depressiona)Organized cluster of tropical thunderstorms with sustained winds between 22-38 mphb)Surface low-pressure area developsc)Assigned a number3)Tropical Storma)Cluster of intense t-storms circulating around a deep low-pressure center with sustained winds of 39mph – 73mphb)Assigned a name4)Hurricanea)Large, organized system of intense tropical t-storms circulating around a very deep low-pressure centerb)74+ mph sustained winds, torrential rains and storm surge 5-30 ftHurricane Initiation and the Coriolis EffectoHurricanes begin life as tropical thunderstorms that often roll of the west coast of Africa.oThe storms form on "easterly waves" which are convergent wind belts that are a part of the east-to-west flowing trade winds.

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