Lecture 29 Tropical CyclonesTropical weather systems in which winds spiral into a low pressure center.Type Wind circulationTropical depression 25-39 mph (12-18 m/s)Tropical storm 39-74 mphHurricane/Typhoon >74 mph (>35 m/s)Saffir-Simpson hurricane damage categoriesCategory Damage Winds Pressure Surge1 Minimal 74- 95 mph > 980 mb 1-2 m2 Moderate 96-110 965-979 2-2.53 Extensive 111-130 945-964 2.5-44 Extreme 131-155 920-944 4-5.55 Catastrophic > 155 < 920 > 5.5Lowest central pressure: Pacific: Typhoon Tip (870 mb, 1979)Atlantic: Hurricane Gilbert (888 mb, 1988)Damage: Hurricane Andrew (1992): $25 billion damageBangladesh (1970): 300,000 dead.Anatomy of a tropical cycloneFilm: Cyclone, second segment (20 min).Lecture 29 Tropical CyclonesTropical weather systems in which winds spiral into a low pressure center.Type Wind circulationTropical depression 25-39 mph (12-18 m/s)Tropical storm 39-74 mphHurricane/Typhoon >74 mph (>35 m/s)Saffir-Simpson hurricane damage categoriesCategoryDamage Winds Pressure Surge1 Minimal 74- 95 mph > 980 mb 1-2 m2 Moderate 96-110 965-979 2-2.53 Extensive 111-130 945-964 2.5-44 Extreme 131-155 920-944 4-5.55 Catastrophic > 155 < 920 > 5.5Lowest central pressure: Pacific: Typhoon Tip (870 mb, 1979)Atlantic: Hurricane Gilbert (888 mb, 1988)Damage: Hurricane Andrew (1992): $25 billion damageBangladesh (1970): 300,000 dead.Anatomy of a tropical cycloneFilm: Cyclone, second segment (20 min).Eyewall Spiral bandEOM
View Full Document
Unlocking...