ATOC 1050 chapter 23 notes

ATOC 1050 chapter 23 notes - ATOC 1050, Rauber, et al....

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ATOC 1050, Rauber, et al. Chpt. 23 Tropical Cyclones Tropical cyclones formed in tropical latitudes and move into mid- latitudes. In USA, most tropical storms form in Atlantic Ocean (usually begin as Easterly waves)or Gulf of Mexico and hit the East coast of Gulf coast. Why not the Pacific coast? 1. Classification of tropical storms is based on wind speed: a. Tropical disturbance – cluster of unorganized thunderstorms with wind speeds between 0 – 20 kts. b. Tropical depression – better organized system; has a central pressure, is assigned a number; wind speeds between 21 – 34 kts. c. Tropical storm – storm is named, wind speeds between 34 - 63kts d. Hurricane (or Cyclone, or Typhoon, or Willy Willy depending on geographic location) – wind speeds greater than or equal to 64kts. 2. Hurricane intensity, Saffir –Simpson scale (see pg. 411): a. Category 1 : wind speeds of 74 – 95 mph (64 – 82 kts.) b. Category 2 : wind speeds of 96 – 110 mph (83 – 95 kts.) c. Category 3 : wind speeds of 111 – 130 mph (96 – 113 kts.) d. Category 4 : wind speeds of 131 – 155 mph ( 114 – 135 kts.) 1
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e. Category 5 : wind speeds of greater than 155 mph (135
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ATOC 1050 chapter 23 notes - ATOC 1050, Rauber, et al....

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