ATOC 185 Lecture Notes - Lecture 6: Landfall, Middle Latitudes, Azores High
6 Dec 2016
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Document Summary
1st appearance of a lowered pressure and wind rotation. Winds near center are consistently between 23-38 mph. Many depressions that occur never develop into a tropical storm: minimum strength hurricane. Sustained winds of at least 74 mph. Saffir-simpson intensity scale: 1, 2, 3, 4, 5. > 18 ft storm surge: not a perfect relationship between storm surge and category. In mississippi, hurricane was category 3 but storm surge was >18 ft: actual category of hurricane is based on sustained wind speed. Sustained wind = wind speed measured over a duration of time. Storm surge: represents elevation above sea level of ocean. Hurricanes tend to rely upon warmth: warmest ocean temperatures are in september. Hurricanes never originate with 5 degrees of equator. Hurricanes rarely originate poleward of 25 degrees of equator. Of the 80 tropical storms that develop annually around the globe, between 50-70% develop into hurricanes. Western pacific in northern hemisphere produces largest number of tropical cyclones (winter and summer)
