The 1921 Atlantic hurricane season was an active hurricane season, with 12 tropical cyclones forming. Among them, seven became tropical storms, of which five strengthened into hurricanes. Furthermore, two of these strengthened into a major hurricane, Category 3 or higher on the modern-day Saffir–Simpson hurricane wind scale, the most since the 1917 season. The first system, a tropical depression, developed on June 1, while the last, a tropical storm, dissipated on November 25. Of note, three tropical cyclones co-existed with another during the season.
The 1898 Atlantic hurricane season marked the beginning of the Weather Bureau operating a network of observation posts across the Caribbean Sea to track tropical cyclones, established primarily due to the onset of the Spanish–American War. A total of eleven tropical storms formed, five of which intensified into a hurricane, according to HURDAT, the National Hurricane Center's official database. Further, one cyclone strengthened into a major hurricane. However, 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 estimated. The first system was initially observed on August 2 near West End in the Bahamas, while the eleventh and final storm dissipated on November 4 over the Mexican state of Veracruz.
The 1897 Atlantic hurricane season was an inactive season, featuring only six known tropical cyclones, four of which made landfall. There were three hurricanes, none of which strengthened into major hurricanes, which are Category 3 or higher on the modern-day Saffir–Simpson hurricane wind scale. The first system was initially observed south of Cape Verde on August 31, an unusually late date. The storm was the strongest of the season, peaking as a Category 2 hurricane with winds of 100 mph (155 km/h). While located well north of the Azores, rough seas by the storm sunk a ship, killing all 45 crewmen. A second storm was first spotted in the Straits of Florida on September 10. It strengthened into a hurricane and tracked northwestward across the Gulf of Mexico, striking Louisiana shortly before dissipating on September 13. This storm caused 29 deaths and $150,000 (1897 USD) in damage.
The 1895 Atlantic hurricane season was a fairly inactive one, featuring only six known tropical cyclones, although each of them made landfall. Of those six systems, only two intensified a hurricane, while none of those strengthened into a major hurricane. However, 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 estimated.
The 1894 Atlantic hurricane season ran through the summer and the first half of fall in 1894. The 1894 season was a fairly inactive one, with seven storms forming, five of which became hurricanes.
The 1893 Atlantic hurricane season was a fairly active season, with 12 tropical storms forming, 10 of which became hurricanes. Of those, five became major hurricanes. It has the third highest accumulated cyclone energy on record for Atlantic hurricane season, totaling 231. This season proved to be a very deadly season, with two different hurricanes each causing over 2,000 deaths in the United States; at the time, the season was the deadliest in U.S. history. The season was one of two seasons on record to see four Atlantic hurricanes active simultaneously, along with the 1998 Atlantic hurricane season. Additionally, August 15, 1893 was the only time since the advent of modern record keeping that three storms have formed on the same day until 2020 saw Wilfred, Alpha, and Beta forming on the same day; and for the first time, there were two high-intensity hurricanes simultaneously in one month of August, and this was not repeated until the year 2023.
The 1890 Atlantic hurricane season was among the least active Atlantic hurricane seasons on record. The first tropical cyclone of the season was initially observed on May 27 and the last storm, Hurricane Four, dissipated over Central America on November 1. These dates fall within the period with the most tropical cyclone activity in the Atlantic. The first storm moved slowly north-northwestward, bringing heavy rains and extensive flooding to Cuba, which caused at least three fatalities and at least $1 million (1890 USD) in damage. It dissipated in the Gulf of Mexico on May 29. Tropical cyclogenesis went dormant for nearly two and a half months, until another system was observed near the Windward Islands on August 18. It traversed the Caribbean Sea and Gulf of Mexico, grazing the Yucatan Peninsula and making landfall in Louisiana before dissipating on August 28. Impact from the storm was minimal.
The 1892 Atlantic hurricane season included the last tropical cyclone on record to pass through the Cabo Verde Islands at hurricane intensity until 2015. A total of nine tropical storms developed, five of which strengthened into a hurricane, though none of them became a major hurricane. However, 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 estimated. Three tropical storms made landfall on the United States.
The 1891 Atlantic hurricane season began during the summer and ran through the late fall of 1891. The season had ten tropical cyclones. Seven of these became hurricanes; one becoming a major Category 3 hurricane.
The 1880 Atlantic hurricane season ran through the summer and fall of 1880. This is the period of each year when most tropical cyclones form in the Atlantic basin. In the 1880 Atlantic season there were two tropical storms, seven hurricanes, and two major hurricanes (Category 3+). However, 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 estimated. Of the known 1880 cyclones, Hurricane Six was first documented in 1995 by José Fernández-Partagás and Henry Díaz. They also proposed large changes to the known tracks of several other storms for this year and 're-instated' Hurricane Ten to the database. A preliminary reanalysis by Michael Chenoweth, published in 2014, found thirteen storms, nine hurricanes, and four major hurricanes.
The 1887 Atlantic hurricane season was the most active Atlantic hurricane season on record at the time in terms of the number of known tropical storms that had formed, with 19. This total has since been equaled or surpassed multiple times. The 1887 season featured five off-season storms, with tropical activity occurring as early as May, and as late as December. Eleven of the season's storms attained hurricane status, while two of those became major hurricanes. It is also worthy of note that the volume of recorded activity was documented largely without the benefit of modern technology. Consequently, tropical cyclones during this era that did not approach populated areas or shipping lanes, especially if they were relatively weak and of short duration, may have remained undetected. Thus, historical data on tropical cyclones from this period may not be comprehensive, with an undercount bias of zero to four per year between 1886 and 1910 estimated. The first system was initially observed on May 15 near Bermuda, while the final storm dissipated on December 12 over Costa Rica.
The 1883 Atlantic hurricane season ran through the summer and the first half of fall in 1883. This is the period of each year when most tropical cyclones form in the Atlantic basin. In the 1883 Atlantic season there was one tropical storm, one Category 1 hurricane, and two major hurricanes. However, in the absence of modern satellite monitoring and 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 estimated.
The 1851 Atlantic hurricane season was the first Atlantic hurricane season to be included in the official Atlantic tropical cyclone record. Six known tropical cyclones occurred during the season, the earliest of which formed on June 25 and the latest of which dissipated on October 19. These dates fall within the range of most Atlantic tropical cyclone activity. None of the cyclones existed simultaneously with another. Three of the six storms only have a single point in their track known.
The 1882 Atlantic hurricane season ran through the summer and early fall of 1882. This is the period of each year when most tropical cyclones form in the Atlantic basin. In the 1882 Atlantic season there were two tropical storms, two Category 1 hurricanes, and two major hurricanes. However, 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 estimated. Of the known 1882 cyclones, Hurricane One and Hurricane Five were both first documented in 1996 by Jose Fernandez-Partagas and Henry Diaz, while Tropical Storm Three was first recognised in 1997. Partagas and Diaz also proposed large changes to the known track of Hurricane Two while further re-analysis, in 2000, led to the peak strengths of both Hurricane Two and Hurricane Six being increased. In 2011 the third storm of the year was downgraded from a hurricane to a tropical storm.
The 1879 Atlantic hurricane season ran from the summer to near the end of autumn in 1879. In 1879 there were two tropical storms, four hurricanes, and two major hurricanes. However, 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 estimated. Of the known 1879 cyclones, Hurricane One were first documented in 1995 by Jose Fernandez-Partagas and Henry Diaz. They also proposed large changes to the known tracks of Hurricanes Two, Three, Seven and Eight. Later one storm was deemed not to be a tropical cyclone at all and was dropped from the database.
The 1877 Atlantic hurricane season lasted from mid-summer to late-fall. Records show that in 1877 there were eight cyclones, of which five were tropical storms and three were hurricanes, one of which became a major hurricane. However, 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 estimated.
The 1876 Atlantic hurricane season featured the first hurricane landfall in North Carolina since 1861. Overall, the season was relatively quiet, with five tropical storms developing. Four of these became a hurricane, of which two intensified into major hurricanes. However, due to the absence of remote-sensing satellite and other technology, only storms that affected populated land areas or encountered ships at sea were recorded; therefore, 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 estimated.
The 1875 Atlantic hurricane season featured three landfalling tropical cyclones. However, 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 has been estimated. There were five recorded hurricanes and one major hurricane – Category 3 or higher on the modern-day Saffir–Simpson scale.
The 1871 Atlantic hurricane season lasted from mid-summer to late-fall. Records show that 1871 featured two tropical storms, four hurricanes and two major hurricanes. However, 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. According to a study in 2004, 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 is possible. A later study in 2008 estimated that eight or more storms may have been missed prior to 1878.
The 1874 Atlantic hurricane season was a relatively inactive one, in which seven tropical cyclones developed. Four storms intensified into hurricanes, but none attained major hurricane status. However, 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 estimated.
