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Accumulated Cyclone Energy
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. The ACE index may refer to a single storm or to groups of storms such as those within a particular month, a full season or combined seasons. It is calculated by summing the square of tropical cyclones' maximum sustained winds, as recorded every six hours, but only for windspeeds of at least tropical storm strength (≥ 34 kn; 63 km/h; 39 mph); the resulting figure is divided by 10,000 to place it on a more manageable scale. The calculation originated as the Hurricane Destruction Potential (HDP) index, which sums the squares of tropical cyclones' maximum sustained winds while at hurricane strength, at least 64 knots (≥ 119 km/h; 74 mph) at six-hour recorded intervals across an entire season. The HDP index was later modified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2024 Accumulated Cyclone Energy Index Compared To 30-year Average
4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures. Evolution of the Hindu-Arabic digit Brahmic numerals represented 1, 2, and 3 with as many lines. 4 was simplified by joining its four lines into a cross that looks like the modern plus sign. The Shunga would add a horizontal line on top of the digit, and the Kshatrapa and Pallava evolved the digit to a point where the speed of writing was a secondary concern. The Arabs' 4 still had the early concept of the cross, but for the sake of efficiency, was made in one stroke by connecting the "western" end to the "northern" end; the "eastern" end was finished off with a curve. The Europeans dropped the finishing curve and gradually made the digit less cursive, ending up with a digit very close to the original Brahmin cross. While the shape of the character fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1893 Atlantic Hurricane Season
The 1893 Atlantic hurricane season featured the only known instance of more than one tropical cyclone causing at least 1,000 deaths in the United States. It was a fairly active season, with 12 tropical cyclone, tropical storms forming, 10 of which became hurricanes. Of those, five became major hurricanes. The season is considered hyper-active in terms of accumulated cyclone energy, achieving a total of 231 units, which remains the third-highest ever recorded in the Atlantic basin. Additionally, 1893 became one of two seasons on record to see four Atlantic hurricanes active simultaneously, along with 1998 Atlantic hurricane season, 1998. In the absence of modern satellite and other remote-sensing technologies, only storms that affected populated land areas or encountered ships at sea were recorded, so the actual total could be higher. An undercount bias of zero to six tropical cyclones per year between 1851 and 1885 and zero to four per year between 1886 and 1910 has been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hurricane Isabel
Hurricane Isabel was a Category 5 Atlantic hurricane that struck the east coast of the United States in September 2003. The ninth named storm, fifth hurricane, and second major hurricane of the season, Isabel formed in the eastern Atlantic Ocean on September 6 from a tropical wave. It moved northwestward through an area with light wind shear and warm waters, resulting in strengthening. Isabel reached peak winds of on September 11. After fluctuating in intensity for four days, Isabel gradually weakened and made landfall on the Outer Banks of North Carolina, with winds of on September 18, or a Category 2 on the Saffir-Simpson scale. Isabel quickly weakened over land and became extratropical over western Pennsylvania on the next day. On September 20, the extratropical remnants of Isabel were absorbed into another system over Eastern Canada. In North Carolina, the storm surge from Isabel washed out a portion of Hatteras Island to form what was unofficially known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1893 Great Charleston Hurricane
The 1893 Great Charleston hurricane compounded the effects of the deadly 1893 Sea Islands hurricane, Sea Islands hurricane in August and proceeded to impact areas as far north as Ontario. The ninth known tropical cyclone, ninth hurricane, and fourth major hurricane of 1893 Atlantic hurricane season, the season, this system was first observed south of the Cape Verde, Cabo Verde Islands on September 25. It moved westward and intensified into a hurricane on September 28, before turning northwestward on October 2. By then, the system strengthened into a Category 3 hurricane and likely peaked with maximum sustained winds of 120 mph (195 km/h). The hurricane then moved west-northwestward for several days, beginning on October 6. After passing just north of the Abaco Islands on October 12, the storm curved northwestward and then north-northwestward, remaining closely offshore Florida and Georgia (U.S. state), Georgia. The hurricane then turned northeastward, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hurricane Irma
Hurricane Irma was an extremely powerful and devastating tropical cyclone that was the first Category 5 hurricane to strike the Leeward Islands on record, followed by Hurricane Maria, Maria two weeks later. At the time, it was considered the most powerful hurricane on record in the open Atlantic region, outside of the Caribbean Sea and Gulf of Mexico, until it was surpassed by Hurricane Dorian two years later. It was also the third-strongest Atlantic hurricane at landfall ever recorded, just behind the 1935 Labor Day hurricane, 1935 Labor Day Hurricane and Dorian. The ninth tropical cyclone naming, named storm, fourth hurricane, second Saffir–Simpson scale#Categories, major hurricane, and first List of Category 5 Atlantic hurricanes, Category 5 hurricane of the extremely active 2017 Atlantic hurricane season, Irma caused widespread and catastrophic damage throughout its long lifetime, particularly in the northeastern Caribbean and the Florida Keys. It was also the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hurricane Ivan
Hurricane Ivan was a large, long-lived, and devastating tropical cyclone that caused widespread damage in the Caribbean and United States. The ninth named storm, the sixth hurricane, and the fourth major hurricane of the active 2004 Atlantic hurricane season, Ivan formed in early September and reached Category 5 strength on the Saffir–Simpson Hurricane Scale (SSHS). Ivan caused catastrophic damage in Grenada as a strong Category 3 storm, heavy damage in Jamaica as a strong Category 4 storm, and then severe damage in Grand Cayman, Cayman Islands, and the western tip of Cuba as a Category 5 hurricane. After peaking in strength, the hurricane moved north-northwest across the Gulf of Mexico to strike Pensacola/Milton, Florida and Alabama as a strong Category 3 storm, causing significant damage. Ivan dropped heavy rain on the Southeastern United States as it progressed northeastward and eastward through the Eastern United States, becoming an extratropical cyclone on September 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1899 Atlantic Hurricane Season
The 1899 Atlantic hurricane season featured the longest-lasting tropical cyclone in the Atlantic basin on record. There were nine tropical storms, of which five became hurricanes. Two of those strengthened into major hurricanes, which are Category 3 or higher on the modern day Saffir–Simpson scale. The first system was initially observed in the northeastern Gulf of Mexico on June 26. The tenth and final system dissipated near Bermuda on November 10. These dates fall within the period with the most tropical cyclone activity in the Atlantic. In post-season analysis, two tropical cyclones that existed in October were added to HURDAT – the official Atlantic hurricane database. At one point during the season, September 3 through the following day, a set of three tropical cyclones existed simultaneously. The most significant storm of the season was Hurricane Three, nicknamed the San Ciriaco hurricane. A post-season analysis of this storm indicated that it was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1998 Atlantic Hurricane Season
The 1998 Atlantic hurricane season was a catastrophic and extremely deadly Atlantic hurricane season, which had the highest number of storm-related fatalities in over 218 years and some of the costliest ever at the time. The season had above average activity, due to the dissipation of an El Niño event and transition to La Niña conditions. It officially began on June 1 and ended on November 30, dates which conventionally delimit the period during which most tropical cyclones form in the Atlantic Ocean. The season had a rather slow start, with no tropical cyclones forming in June. The first tropical cyclone, Tropical Storm Alex, developed on July 27, and the season's final storm, Hurricane Nicole, became extratropical on December 1. Several storms made landfall or directly affected land. Hurricane Bonnie made landfall in southeastern North Carolina as a Category 2 hurricane in late August, killing five people and causing about $1 billion in damage. Hurricane Earl c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1961 Atlantic Hurricane Season
The 1961 Atlantic hurricane season was a very active Atlantic hurricane season, with an accumulated cyclone energy (ACE) total of 189, the highest since 1950 and until being surpassed by 1995 and 2005. The season, however, was an average one in terms of named storms. The season featured eight hurricanes and a well above average number of five major hurricanes. It was previously thought that the season had a record-tying seven major hurricanes, before the Atlantic hurricane reanalysis project downgraded two storms in 2019. Two Category 5 hurricanes were seen in 1961, making it one of only eight Atlantic hurricane seasons to feature multiple Category 5 hurricanes in one season. The season started on June 15, and ended on November 15. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The first system, an operationally unclassified tropical depression, formed offshore east Central Florida on June 10, but dissipat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1950 Atlantic Hurricane Season
The 1950 Atlantic hurricane season was the first year in the Atlantic hurricane database (HURDAT) that storms were given names in the Atlantic basin. Names were taken from the Joint Army/Navy Phonetic Alphabet, with the first named storm being designated "Able", the second "Baker", and so on. It was a very active season with sixteen tropical storms, with eleven of them developing into hurricanes. Six of these hurricanes were intense enough to be classified as major hurricanes—a denomination reserved for storms that attained sustained winds equivalent to a Category 3 or greater on the present-day Saffir–Simpson scale. One storm, the twelfth of the season, was unnamed and was originally excluded from the yearly summary, and three additional storms were discovered in re-analysis. The large quantity of strong storms during the year yielded, prior to modern reanalysis, what was the highest seasonal accumulated cyclone energy (ACE) of the 20th century in the Atlantic basin; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2017 Atlantic Hurricane Season
The 2017 Atlantic hurricane season was a devastating and extremely active Atlantic hurricane season that became the costliest tropical cyclone season on record worldwide, with a damage total of at least $294.92 billion (USD). It was the second consecutive above–average season dating back to 2016. The season featured 17 named storms, 10 hurricanes, and 6 major hurricanes. Most of the season's damage was due to hurricanes Harvey, Irma, and Maria. Another notable hurricane, Nate, was the worst natural disaster in Costa Rican history. These four storm names were retired following the season due to the number of deaths and amount of damage they caused. Collectively, the tropical cyclones were responsible for at least 3,364 deaths. The season also had the highest accumulated cyclone energy (ACE) since 1893, 1926, and 2005 with an approximate index of 224 units, with a record three hurricanes each generating an ACE of over 40: Irma, Jose, and Maria. This season featured two C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
