![]() ![]() Although anemometer, a device used for measuring wind speed, was invented in 1846, during major hurricane strikes the instruments were often blown away or damaged, leaving the hurricane's peak intensity unrecorded. It can be presumed that earlier storms reached Category 5 strength over open waters, but the strongest winds were not measured. No Category 5 hurricanes were observed officially before 1924. Ī total of 40 tropical cyclones have been estimated to have peaked as Category 5 hurricanes on the SSHWS, with the first occurrence recorded in 1924. Within the region, a Category 5 hurricane is a tropical cyclone which reaches Category 5 status on the Saffir–Simpson hurricane wind scale, that is, a tropical cyclone that has 1-minute mean maximum sustained wind speeds of 137 knots (254 km/h 158 mph 70 m/s) or greater at 10 metres (32.8 ft) above ground. Within the Atlantic Ocean to the north of the Equator, hurricanes are officially monitored by the United States's National Hurricane Center (NHC), however, other meteorological services, such as Météo-France, the United Kingdom's Met Office and Environment Canada also monitor the basin. Since 1960, 29 Atlantic hurricanes have reached Category 5.īackground Tracks of all known Category 5 Atlantic hurricanes between 18. However, because technologies such as satellite monitoring were not available until the 1960s, some such cyclones may have remained undetected. The United States National Hurricane Center currently estimates that 11 tropical cyclones between 1851 (the first Atlantic hurricane season to be included in the official Atlantic tropical cyclone record) and 1959 peaked as Category 5 hurricanes. They are among the strongest tropical cyclones that can form on Earth, having 1-minute sustained wind speeds of at least 137 knots (254 km/h 158 mph 70 m/s). Hurricane Lee as a Category 5 hurricane on the early morning of September 8, 2023.Ī Category 5 Atlantic hurricane is a tropical cyclone that reaches Category 5 intensity on the Saffir–Simpson hurricane wind scale, within the Atlantic Ocean to the north of the equator. ![]()
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