GEO 211 1st Edition Lecture 32 Outline of Last Lecture I. Chapter 15- HurricanesA. Region Local NamesB. Hurricanes compared with mid-latitude cyclonesC. Hurricanes derive Energy from tropical warm oceansOutline of Current Lecture II. Hurricane formation A. Stages of development1. Tropical disturbance2. Tropical depression3. Tropical storm4. HurricaneB. Saffirr-Simpson scale” for hurricanes/potential damageCurrent LectureII. Hurricane formation- Begins with convergence and rising of surface winds (warm ocean water)- Wavelike disturbance develops called easterly wave- East side of dashed line surface wins converge and riseo Brings cloudy weather- West wide of the dashed line surface wind sinks to surface and diverges- Brings sunny weatherA. Stages of development1. Tropical disturbance- disorganized cluster of tropical thunderstorms, slight/no circulation2. Tropical depression- organized cluster of tropical thunderstorms with weak cyclonic circulation less than 3 mphThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.3. Tropical storm- tropical cyclone with highest sustained cyclonic winds at center between 39-74 mph4. Hurricane- tropical cyclone with cyclonic winds at the center of at least 74 mphB. Saffirr-Simpson scale” for hurricanes/potential damage1. 74-95 mph (minimal)2. 96-110 mph (moderate)3. 111-130 mph (extensive)4. 131-155 mph (extreme)5. > 155 mph (catastrophic)- 3, 4, 5 are considered major
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