The 1970 Atlantic hurricane season officially began on June 1 and lasted until November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The season was fairly average, with 14 named storms forming, of which seven were hurricanes. Two of those seven became major hurricanes, which are Category 3 or higher on the Saffir–Simpson scale. Also, this was the first season in which reconnaissance aircraft flew into all four quadrants of a tropical cyclone.
The 1971 Atlantic hurricane season was fairly active with several notable storms. Hurricane Edith, the strongest of the season, was a Category 5 on the Saffir-Simpson scale, the highest category on the scale, even though it was the least intense for that category on record, at 943 mbar. It struck Nicaragua at peak intensity, killing dozens, and later hit southern Louisiana. Until 2003, Hurricane Ginger held the record for the longest known duration of a North Atlantic tropical cyclone, lasting 27.25 days from early September to early October; it is currently the second longest-lasting Atlantic hurricane. Ginger moved ashore in North Carolina, producing heavy rains and damaging winds. An unnamed storm in August attained hurricane status further north than any other Atlantic hurricane. On 11 September, seven tropical cyclones were active at the same time, the record for the Atlantic basin.
The 1955 Atlantic hurricane season was, at the time, the costliest season ever recorded, just ahead of the previous year. The hurricane season officially began on June 15, 1955, and ended on November 15, 1955. It was an extremely active season in terms of accumulated cyclone energy (ACE), but slightly above average in terms of tropical storms, with 13 recorded tropical cyclones. The first storm, Alice, had persisted since December 30, 1954. Alice caused relatively minor impact as it tracked through the Lesser Antilles and eastern Caribbean Sea in early January. Tropical Storm Brenda caused two deaths and minor damage along the Gulf Coast of the United States in early August. The quick succession of Hurricanes Connie and Diane caused significant flooding in the Northeastern United States, with nearly $1 billion in losses and at least 232 fatalities. The next three storms – Hurricanes Edith and Flora and Tropical Storm Five – caused very minor or no impact. In early September, Hurricane Gladys caused severe localized flooding in Mexico, primarily in Mexico City. Additionally, an offshoot of Gladys inflicted minor impact in Texas.
The 1957 Atlantic hurricane season featured one of the longest-travelling tropical cyclones in the Atlantic basin, Hurricane Carrie. Nevertheless, the season was generally inactive, with eight tropical storms – two of which went unnamed – and three hurricanes, two of which intensified further to attain major hurricane intensity. The season officially began on June 15 and ended on November 15, though the year's first tropical cyclone developed prior to the start of the season on June 8. The final storm dissipated on October 27, well before the official end of the season. The strongest hurricane of the year was Carrie, which reached the equivalent of a Category 4 hurricane on the Saffir–Simpson hurricane scale on two separate occasions in the open Atlantic; Carrie later caused the sinking of the German ship Pamir southwest of the Azores, resulting in 80 deaths.
The 1954 Atlantic hurricane season was an above-average Atlantic hurricane season in terms of named storms, with 16 forming. Overall, the season resulted in $751.6 million in damage, the most of any season at the time. The season officially began on June 15, and nine days later the first named storm developed. Hurricane Alice developed in the Gulf of Mexico and moved inland along the Rio Grande, producing significant precipitation and record flooding that killed 55 people. Activity was slow until late August; only Barbara, a minimal tropical storm, developed in July. In the span of two weeks, hurricanes Carol and Edna followed similar paths before both striking New England as major hurricanes. The latter became the costliest hurricane in Maine's history.
Hurricane Kenna was the fourth-most intense tropical cyclone on record in the Eastern Pacific basin, and at the time the third-most intense Pacific hurricane to strike the west coast of Mexico. Kenna was the sixteenth tropical depression, thirteenth tropical storm, seventh hurricane, sixth major hurricane, and third Category 5 hurricane of the 2002 Pacific hurricane season. After forming on October 22 to the south of Mexico from a tropical wave, forecasters consistently predicted the storm to strengthen much less than it actually did. Moving into an area of favorable upper-level conditions and warm sea surface temperatures, Kenna quickly strengthened to reach peak winds of 165 mph (270 km/h) as a Category 5 hurricane, on October 25, while located about 255 mi (410 km) southwest of Puerto Vallarta, Jalisco. Weakening as it turned to the northeast, the hurricane made landfall near San Blas, Nayarit as a Category 4 hurricane, with sustained winds of 140 mph (220 km/h), before dissipating on October 26 over the Sierra Madre Occidental mountains.
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 1932 Atlantic hurricane season featured several powerful storms, including the Cuba hurricane, which remains the deadliest tropical cyclone in the history of Cuba and among the most intense to strike the island nation. It was a relatively active season, with fifteen known storms, six hurricanes, and four major hurricanes. However, tropical cyclones that did not approach populated areas or shipping lanes, especially if they were relatively weak and of short duration, may have remained undetected. Because technologies such as satellite monitoring were not available until the 1960s, historical data on tropical cyclones from this period are often not reliable. The Atlantic hurricane reanalysis project discovered four new tropical cyclones, all of which were tropical storms, that occurred during the year. Two storms attained Category 5 intensity, the first known occurrence in which multiple Category 5 hurricanes formed in the same year. The season's first cyclone developed on May 5, while the last remaining system transitioned into an extratropical cyclone by November 13.
The 1928 Atlantic hurricane season was a near average hurricane season in which seven tropical cyclones developed. Of these, six intensified into a tropical storm and four further strengthened into hurricanes. One hurricane deepened into a major hurricane, which is Category 3 or higher on the modern-day Saffir–Simpson scale. The first system, the Fort Pierce hurricane, developed near the Lesser Antilles on August 3. The storm crossed the Bahamas and made landfall in Florida. Two fatalities and approximately $235,000 in damage was reported. A few days after the first storm developed, the Haiti hurricane, formed near the southern Windward Islands on August 7. The storm went on to strike Haiti, Cuba, and Florida. This storm left about $2 million in damage and at least 210 deaths. Impacts from the third system are unknown.
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 1996 Pacific hurricane season is tied with 2021 for the most Pacific hurricanes to make landfall on Mexico in one year, with four striking the country. It was a below average season that produced 9 tropical storms, 5 hurricanes and 2 major hurricanes. With 9 tropical storms, 1996 ranks as the second-least active Pacific hurricane season on record. It officially began May 15, 1996, in the eastern north Pacific and on June 1, 1996, in the central north Pacific. It ended on November 30, 1996. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. The season slightly exceeded these bounds when tropical storm One-E formed on May 13.
The 1901 Atlantic hurricane season was the most active season without a major hurricane – tropical cyclones that reach at least Category 3 on the Saffir–Simpson hurricane wind scale – until 2013. The first system was initially observed in the northeastern Caribbean on June 11. The fourteenth and final system transitioned into an extratropical cyclone near Bermuda on November 5. These dates fall within the period with the most tropical cyclone activity in the Atlantic. Eight of the fourteen tropical cyclones existed simultaneously.
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 hurricane wind 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 1975 Pacific hurricane season officially started May 15, 1975, in the eastern Pacific, and June 1, 1975, in the central Pacific, and lasted until November 30, 1975. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeast Pacific Ocean.
The 1971 Pacific hurricane season began on May 15, 1971 in the eastern Pacific, and on June 1, 1971 in the Central Pacific ; both ended on November 30, 1971. These dates, adopted by convention, historically describe the period in each year when most tropical cyclogenesis occurs in these regions of the Pacific. It was the first year that continuous Weather satellite coverage existed over the entire Central Pacific. As such, this season is often viewed as the start year for modern reliable tropical cyclone data in the Pacific Ocean.
Hurricane Calvin was one of three Pacific hurricanes on record to make landfall along the Mexican coast during the month of July. The fourth tropical cyclone, third named storm, and second hurricane of the 1993 Pacific hurricane season, Calvin developed from an area of convection to the south of Mexico on July 4. The following day, the system intensified into a tropical storm, which was named Calvin. Continued strengthening ensued as Calvin curved from its initial westward track northward, and was upgraded to a hurricane on July 6. Calvin eventually turned northwest, and became a Category 2 hurricane on the Saffir–Simpson hurricane wind scale (SSHWS). By July 7, Hurricane Calvin made landfall near Manzanillo at peak strength. Calvin rapidly weakened after landfall, and was a tropical storm when it reemerged into the Pacific Ocean on early on July 8. Despite this, the hurricane did not reintensify, and continued to weaken as it headed rapidly northwestward. As Calvin made a second Mexican landfall near the southern tip of Baja California peninsula late on July 8, it weakened to a tropical depression. Early on July 9, the depression dissipated shortly after entering the Pacific Ocean for a third time.
The 1885 Atlantic hurricane season ran through the summer and the first half of fall in 1885. This is the period of each year when most tropical cyclones form in the Atlantic basin. In 1885 there were two tropical storms and six hurricanes in the Atlantic basin. 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.
Hurricane Boris was the second of three storms to impact the Pacific coast of Mexico in June and July 1996. The fourth tropical cyclone and second hurricane of the 1996 Pacific hurricane season, Boris formed out of a tropical wave roughly 250 mi (400 km) south of the Gulf of Tehuantepec on June 27. The storm gradually intensified, becoming a tropical storm the following day and then hurricane on June 29. As the storm neared landfall, an eye developed and Boris reached its peak intensity with winds of 90 mph (140 km/h). Shortly after, the hurricane made landfall along the south coast of Mexico, between Lázaro Cárdenas and Acapulco, at this intensity. Boris quickly weakened following its landfall, becoming a tropical depression roughly 18 hours later. The remnants of the system persisted until July 1, at which time it dissipated just offshore the Mexican coastline. Boris caused heavy flooding in southern Mexico that resulted in ten fatalities; however, a damage estimate is unknown.
Hurricane How was the only tropical cyclone to make landfall on the United States in 1951. It was the eighth storm of the season, forming on September 28 in the northwest Caribbean and, after entering the Gulf of Mexico, turned eastward and became a tropical storm. The storm brought heavy rainfall to Florida, causing flooding and $2 million in damage. Tropical Storm How later became a hurricane, passing near the Outer Banks of North Carolina where it produced strong winds and high tides. A ship called the "Southern Isles" capsized off Cape Hatteras, killing 17 out of the crew of 23. Rains and high tides occurred in southeastern New England, before the hurricane moved out to sea and became extratropical.
Hurricane Eugene was the only tropical cyclone to make landfall in Mexico during the 1987 Pacific hurricane season. The eighth tropical cyclone, fifth named storm, and first hurricane of the season, Eugene developed on July 22 from a tropical disturbance centered well offshore of Mexico. Later that day, the system intensified into a tropical storm while moving northwestward. Eugene reached hurricane status on July 24; it briefly peaked as a Category 2 hurricane the next day. Hurricane Eugene weakened back to a Category 1 hurricane; subsequently, the hurricane made landfall near Manzanillo. Shortly after landfall, Eugene rapidly weakened inland, and was only a tropical storm when it re-emerged into open water, where it quickly dissipated. Throughout southwestern Mexico, the storm produced high winds, especially in the southwestern portion of the country. The hurricane deluged the southwest Mexican coastline, resulting in the highest rainfall totals from a tropical cyclone in five Mexican states. Over 5,000 people were left homeless, including 60 in Manzanillo. The city's airport control tower was also damaged, requiring closure. Elsewhere, 200 to 300 houses were destroyed in Colima. In all, Eugene injured 18 people, and caused three fatalities and $142.12 million (1987 USD) in damage.
