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This measuring system was formerly known as the Saffir–Simpson hurricane scale, or SSHS. To be classified as a hurricane, a tropical cyclone must have one-minute-average maximum sustained winds at 10 m (33 ft) above the surface of at least 74 mph (64 kn, 119 km/h; Category 1). [ 1 ] The highest classification in the scale, Category 5 ...
A Category 4 hurricane has winds of 113 to 136 kn (130 to 157 mph; 209 to 252 km/h), while a Category 5 hurricane has winds of at least 137 kn (158 mph; 254 km/h). [1] [3] A post tropical cyclone is a system that has weakened, into a remnant low or has dissipated and formal advisories are usually discontinued at this stage. [1]
Hurricane categories. Category 1: Winds 74-95 mph. Damage primarily to shrubbery, trees, poorly constructed items, and unanchored mobile homes. Category 2: Winds 96-110 mph. Some roof damage ...
A tropical cyclone forecast model is a computer program that uses meteorological data to forecast aspects of the future state of tropical cyclones. There are three types of models: statistical, dynamical, or combined statistical-dynamic. [ 1 ] Dynamical models utilize powerful supercomputers with sophisticated mathematical modeling software and ...
Once a tropical storm strengthens into a hurricane, it earns a category designation on the Saffir-Simpson Hurricane Wind Scale: 1 through 5.
A 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. 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 ...
The 1935 Labor Day hurricane was the most intense hurricane to make landfall on the country, having struck the Florida Keys with a pressure of 892 mbar.It was one of only seven hurricanes to move ashore as a Category 5 hurricane on the Saffir–Simpson hurricane scale; the others were "Okeechobee" in 1928, Karen in 1962, Camille in 1969, Andrew in 1992, Michael in 2018, and Yutu in 2018, which ...
Editor's note: Read USA TODAY's coverage of Helene's landfall and impacts for Friday, Sept. 27. As monster storms like Helene approach the U.S., meteorologists use five categories to help signal ...