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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 ]
Along the coast, a Category 1 hurricane can produce a storm surge from four to five feet. This rise in water level can cause localized erosion and flood low-lying areas. Hurricane Irene (1999) and ...
Once a tropical storm strengthens into a hurricane, it earns a category designation on the Saffir-Simpson Hurricane Wind Scale: 1 through 5.
Hurricanes in categories 3, 4 and 5 are considered major hurricanes due to their potential for significant loss of life and damage. Even Category 1 hurricanes can be dangerous and require preparation.
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 ...
List of Category 1 Atlantic hurricanes. Hurricane Oscar is the most recent Category 1 hurricane as of October 2024. Category 1 is the lowest hurricane classification on the Saffir–Simpson scale. When a storm's wind speed is between 64 knots (74 mph; 119 km/h; 33 m/s) and 82 knots (95 mph; 153 km/h; 42 m/s), it is classified as a Category 1. [1]
Hurricane strength is measured in categories on the Saffir-Simpson Hurricane Wind Scale. What does it all mean? We break it down from Category 1 to 5.
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