The 1995 Atlantic hurricane season was an extremely active Atlantic hurricane season, and is considered to be the start of an ongoing era of high-activity tropical cyclone formation. The season produced twenty-one tropical cyclones, nineteen named storms, as well as eleven hurricanes and five major hurricanes. The season officially began on June 1 and ended on November 30, dates which conventionally delimit the period of each year when most tropical cyclones develop in the Atlantic basin. The first tropical cyclone, Hurricane Allison, developed on June 2, while the season's final storm, Hurricane Tanya, transitioned into an extratropical cyclone on November 1. The very active Atlantic hurricane activity in 1995 was caused by La Niña conditions, which also influenced an inactive Pacific hurricane season.
The 1997 Atlantic hurricane season was a below-average hurricane season. It officially began on June 1, and lasted until November 30 of that year. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The 1997 season was fairly inactive, with only seven named storms forming, with an additional tropical depression and an unnumbered subtropical storm. It was the first time since the 1961 season that there were no active tropical cyclones in the Atlantic basin during the entire month of August–historically one of the more active months of the season—a phenomenon that would not occur again until 2022. A strong El Niño is credited with reducing activity in the Atlantic, while increasing the number of storms in the eastern and western Pacific basins to 19 and 26 storms, respectively. As is common in El Niño years, tropical cyclogenesis was suppressed in the tropical latitudes, with only two becoming tropical storms south of 25°N.
The 1992 Atlantic hurricane season was a significantly below average season in which only ten tropical or subtropical cyclones formed. Six became named tropical storms, of which four became hurricanes. Among the four was Hurricane Andrew, a major hurricane, and the costliest Atlantic hurricane on record at the time, surpassing Hugo of 1989. The season officially started on June 1 and officially ended on November 30. However, tropical cyclogenesis is possible at any time of the year, as demonstrated by formation in April of an unnamed subtropical storm in the central Atlantic. A June tropical depression caused flooding in Cuba and in Florida, where two people were killed. In August, Andrew struck the Bahamas, Florida, and Louisiana. In all, it caused $27.3 billion in damage, mostly in Florida, as well as 65 fatalities. The greatest impact was in South Florida, where the storm made landfall with 1-minute sustained winds of 175 mph (280 km/h).
The 1973 Atlantic hurricane season was the first season to use the Saffir–Simpson hurricane scale, a scale developed in 1971 by Herbert Saffir and Robert Simpson to rate the intensity of tropical cyclones. The season produced 24 tropical and subtropical cyclones, of which only 8 reached storm intensity, 4 became hurricanes, and only 1 reached major hurricane status. Although more active than the 1972 season, 1973 brought few storms of note. Nearly half of the season's storms affected land, one of which resulted in severe damage.
The 1982 Atlantic hurricane season was an extremely inactive Atlantic hurricane season with five named tropical storms and one subtropical storm. Two storms became hurricanes, one of which reached major hurricane status. The season officially began on June 1, 1982, and lasted until November 30, 1982. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. Activity started early with Hurricane Alberto forming on the first day of the season. Alberto threatened the Southwestern Florida coast as a tropical storm, meadering offshore in the southeastern Gulf of Mexico and causing 23 fatalities in Cuba. The next system, a subtropical storm, formed later in June and affected the same area as Alberto, causing $10 million in damage.
The 1984 Atlantic hurricane season was the most active since 1971, though the season was below average in hurricanes and major hurricanes. It officially began on June 1, 1984, and lasted until November 30, 1984. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The 1984 season was an active one in terms of named storms, but most of them were weak and stayed at sea. Most of the cyclones tracked through the northwest subtropical Atlantic west of the 50th meridian to near the Eastern coast of the United States between mid-August and early October. The most damaging storm was Hurricane Klaus, which caused $152 million (1984 dollars) in damage in Puerto Rico. Hurricane Diana was the first hurricane to strike a nuclear power plant without incident; it was also the first major hurricane to strike the U.S. East Coast in nearly 20 years. Also of note was Hurricane Lili, which lasted well after the official end of the season. It was downgraded from a named storm on December 24. Damage overall from the tropical cyclones in 1984 totaled $228.7 million. Unusually, no hurricanes developed from tropical waves in 1984, which usually are the source of the strongest storms in an Atlantic hurricane season.
The 1990 Atlantic hurricane season was the most active Atlantic hurricane season since 1969, with a total of 14 named storms. The season also featured eight hurricanes, one of which intensified into a major hurricane. It officially began on June 1, 1990, and lasted until November 30, 1990. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. However, tropical cyclogenesis can occur prior to the start of the season, as demonstrated with Tropical Depression One, which formed in the Caribbean Sea on May 24.
The 1991 Atlantic hurricane season was the first season since 1984 in which no hurricanes developed from tropical waves, which are the source for most North Atlantic tropical cyclones. The hurricane season officially began on June 1, and ended on November 30. It was the least active in four years due to higher than usual wind shear across the Atlantic Ocean. The first storm, Ana, developed on July 2 off the southeast United States and dissipated without causing significant effects. Two other tropical storms in the season – Danny and Erika – did not significantly affect land. Danny dissipated east of the Lesser Antilles, and Erika passed through the Azores before becoming extratropical. In addition, there were four non-developing tropical depressions. The second depression of the season struck Mexico with significant accompanying rains.
The 1948 Atlantic hurricane season featured the first tropical cyclone before the month of June since 1940. The season officially began on June 15, 1948, and lasted until November 15, 1948. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. There were 10 tropical cyclones; six storms attained hurricane status, and four storms intensified into major hurricanes, which are Category 3 or higher on the modern-day Saffir–Simpson hurricane wind scale. Operationally, it was believed that a weak tropical disturbance formed over the southeast Bahamas in May and moved northwest into the Georgia coast near Savannah. This system was later excluded from HURDAT. The seventh tropical cyclone was not operationally considered a tropical cyclone, but was later added to HURDAT.
The 1997 Pacific hurricane season was a very active hurricane season. With hundreds of deaths and hundreds of millions of dollars in damage, this season was one of the costliest and deadliest Pacific hurricane seasons. This was due to the exceptionally strong 1997–98 El Niño event. The season officially started on May 15, in the eastern Pacific, and on June 1, in the central Pacific, and lasted until November 30. These dates conventionally delimit the period of each year when almost all tropical cyclones form in the northeastern Pacific Ocean.
The 1991 Pacific typhoon season ran year-round in 1991, although most tropical cyclones tended to form in the northwestern Pacific Ocean between May and November, 1991. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.
The 1991 Perfect Storm, also known as The No-Name Storm and the Halloween Gale/Storm, was a nor'easter that absorbed Hurricane Grace, and ultimately evolved into a small unnamed hurricane itself late in its life cycle.
Hurricane Gert was the fourth of five major hurricanes in the moderately active 1999 Atlantic hurricane season. A Cape Verde hurricane, Gert formed on September 11 off the coast of Africa before heading west-northwest. It reached a peak wind speed of 150 mph (240 km/h) by September 15 over the open central Atlantic east-northeast of the Leeward Islands. It gradually curved to the northwest and later to the north, due to a weakness in the subtropical ridge created by Hurricane Floyd. Hurricane Gert passed east of Bermuda on September 21 and began a steady weakening trend at that time. It turned to the northeast, and on September 23, Gert transitioned into an extratropical cyclone to the southeast of Atlantic Canada before being absorbed by a larger storm.
Subtropical Storm Nicole was the first subtropical storm to receive a name using the standard hurricane name list that did not become a tropical cyclone. The fifteenth tropical or subtropical cyclone and fourteenth named storm of the 2004 Atlantic hurricane season, Nicole developed on October 10 near Bermuda from a broad surface low that developed as a result of the interaction between an upper level trough and a decaying cold front. The storm turned to the northeast, passing close to Bermuda as it intensified to reach peak winds of 50 mph (80 km/h) on October 11. Deep convection developed near the center of the system as it attempted to become a fully tropical cyclone. However, it failed to do so and was absorbed by an extratropical cyclone late on October 11.
Hurricane Karen was a hurricane of non-tropical origin that formed in October of the 2001 Atlantic hurricane season. It developed out of the interaction between a cold front and an upper level trough on October 10 located to the south of Bermuda, and quickly strengthened as an extratropical storm. The storm passed near Bermuda on October 12, producing hurricane-force winds on the island. It then organized, becoming a subtropical cyclone on October 12 and a tropical cyclone on October 13. Karen strengthened to reach 80 mph (130 km/h) winds as a Category 1 hurricane on the Saffir-Simpson Hurricane Scale, and after weakening over cooler waters, it made landfall on Nova Scotia as a tropical storm. It quickly became extratropical.
Hurricane Tanya was the first named storm to start with a "T" in the Atlantic since naming began in 1950, and the final storm of the very active 1995 Atlantic hurricane season. The twenty-first tropical cyclone, nineteenth named storm, and eleventh hurricane of the season, Tanya developed from a tropical wave while well north of the Lesser Antilles on October 26. The system headed northeastward and strengthened into Tropical Storm Tanya on October 27. Tanya meandered around the central Atlantic, and further intensified into a hurricane on October 29. Thereafter, Tanya tracked northeastward before curving to the east-northeast. After switching to an eastward direction, Tanya weakened to a tropical storm on November 1. Later that day, Tanya passed through the Azores as it was transitioning into an extratropical cyclone.
Hurricane Florence was a strong, late season hurricane that remained out over the open waters of the Atlantic Ocean for nearly a week, before being absorbed into a large extratropical cyclone. With peak winds of 110 mph (180 km/h) and a minimum pressure of 972 mbar, Florence was the strongest storm of the 1994 Atlantic hurricane season. Florence developed out of an area of low pressure associated with a stalled frontal system located 1,150 mi (1,850 km) east-southeast of Bermuda in late October. The system gradually became better organized and was classified a subtropical depression on November 2. The storm intensified into a subtropical storm shortly thereafter before weakening into a tropical depression on the next day.
The 1994 Atlantic hurricane season was the final season in the most recent negative Atlantic multidecadal oscillation period of tropical cyclone formation within the basin. The season produced seven named tropical cyclones and three hurricanes, a total well below the seasonal average. The season officially started on June 1 and ended on November 30, dates which conventionally limit the period each year when most tropical cyclones tend to form in the Atlantic Ocean. The first tropical cyclone, Tropical Storm Alberto, developed on June 30, while the last storm, Hurricane Gordon, dissipated on November 21. The season was unusual in that it produced no major hurricanes, which are those of Category 3 status or higher on the Saffir–Simpson hurricane scale. The most intense hurricane, Hurricane Florence, peaked as a Category 2 storm with winds of 110 mph (180 km/h).
The 2009 Atlantic hurricane season was a below-average Atlantic hurricane season that produced eleven tropical cyclones, nine named storms, three hurricanes, and two major hurricanes. It officially began on June 1 and ended on November 30, dates that conventionally delimit the period of each year when most tropical cyclones develop in the Atlantic basin. The season's first tropical cyclone, Tropical Depression One, developed on May 28, while the final storm, Hurricane Ida, dissipated on November 10. The most intense hurricane, Bill, was a powerful Cape Verde-type hurricane that affected areas from the Leeward Islands to Newfoundland. The season featured the lowest number of tropical cyclones since the 1997 season, and only one system, Claudette, made landfall in the United States. Forming from the interaction of a tropical wave and an upper-level low, Claudette made landfall on the Florida Panhandle with maximum sustained winds of 45 mph (70 km/h) before quickly dissipating over Alabama. The storm killed two people and caused $228,000 in damage.
The 2021 Atlantic hurricane season was the third-most active Atlantic hurricane season on record, although many storms were weak and short-lived. With 21 named storms forming, it became the second season in a row and third overall in which the designated 21-name list of storm names was exhausted. Seven of those storms strengthened into a hurricane, four of which reached major hurricane intensity, which is slightly above-average. The season officially began on June 1 and ended on November 30. These dates historically describe the period in each year when most Atlantic tropical cyclones form. However, subtropical or tropical cyclogenesis is possible at any time of the year, as demonstrated by the development of Tropical Storm Ana on May 22, making this the seventh consecutive year in which a storm developed outside of the official season.
