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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 ]
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]
In 1973, the National Hurricane Center introduced the Saffir-Simpson scale, a five-category rating system that classified hurricanes by wind intensity.. At the bottom of the scale was Category 1 ...
Accumulated cyclone energy (ACE) is a metric used to compare overall activity of tropical cyclones, utilizing the available records of windspeeds at six-hour intervals to synthesize storm duration and strength into a single index value. [2]
In comparison, the 1998 hurricane season also had 14 named storms. Unlike 2013, the 1998 hurricane season went down in the record books as one of the deadliest and costliest seasons at the time.
Largest Atlantic hurricanes By diameter of gale-force winds; Rank System Season Diameter mi km 1 Sandy: 2012: 1,150 1,850 2 Martin: 2022: 1,040 1,670 3 Igor:
The hurricane produced a peak storm surge of 24 feet and flattened nearly everything along the Mississippi coast. It caused an estimated $1.42 billion in damages (more than $12 billion in 2024 ...
Use of this measure has objectively determined that tropical cyclones in the northwest Pacific Ocean are the largest on Earth on average, with North Atlantic tropical cyclones roughly half their size. [3] Active databases of ROCI are maintained by the National Hurricane Center for systems tracked in the eastern north Pacific and north Atlantic ...