The 1951 Atlantic hurricane season was the first hurricane season in which tropical cyclones were officially named by the United States Weather Bureau. The season officially started on June 15, when the United States Weather Bureau began its daily monitoring for tropical cyclone activity; the season officially ended on November 15. It was the first year since 1937 in which no hurricanes made landfall on the United States; as Hurricane How was the only tropical storm to hit the nation, the season had the least tropical cyclone damage in the United States since the 1939 season. As in the 1950 season, names from the Joint Army/Navy Phonetic Alphabet were used to name storms this season.
The 1998 Pacific hurricane season was a fairly average Pacific hurricane season. Despite this, it had nine hurricanes and six major hurricanes, which was well above average. The season officially started on May 15 in the eastern Pacific and on June 1 in the central Pacific, and ended on November 30; these dates conventionally delimit the period during which most tropical cyclones form in that region. The first tropical cyclone developed on June 11, about ten days later than the normal start of the season. The final storm of the year, Hurricane Madeline, dissipated on October 20. Storm activity in the Central Pacific Hurricane Center's warning zone was low, with just one tropical depression observed in the region. Two tropical cyclones from the eastern Pacific also entered the central Pacific; the former did so as a hurricane.
The 1997 Pacific hurricane season was a very active hurricane season. With hundreds of deaths and hundreds of millions of dollars in damage, this was one of the deadliest and costliest Pacific hurricane seasons on record. 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 1988 Pacific hurricane season was the least active Pacific hurricane season since 1981. It officially began May 15, in the eastern Pacific, and June 1, in the central Pacific and lasted until November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. The first named storm, Tropical Storm Aletta, formed on June 16, and the last-named storm, Tropical Storm Miriam, was previously named Hurricane Joan in the Atlantic Ocean before crossing Central America and re-emerging in the eastern Pacific; Miriam continued westward and dissipated on November 2.
The 1987 Pacific hurricane season was the last year in which the Eastern Pacific Hurricane Center was the primary warning center for tropical cyclones in the eastern Pacific Ocean. The season officially started May 15, 1987, in the eastern Pacific, and June 1, 1987, in the central Pacific, and lasted until November 30, 1987. These dates conventionally delimit the period of each year when the vast majority of tropical cyclones form in the northeastern Pacific Ocean.
The 1986 Pacific hurricane season featured several tropical cyclones that contributed to significant flooding to the Central United States. The hurricane season officially started May 15, 1986, in the eastern Pacific, and June 1, 1986 in the central Pacific, and lasted until November 30, 1986 in both regions. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. A total of 17 named storms and 9 hurricanes developed during the season; this is slightly above the averages of 15 named storms and 8 hurricanes, respectively. In addition, 26 tropical depressions formed in the eastern Pacific during 1986, which, at the time, was the second most ever recorded; only the 1982 Pacific hurricane season saw a higher total.
The 1985 Pacific hurricane season is the third-most active Pacific hurricane season on record. It officially started on May 15, 1985, in the eastern Pacific, and on June 1, 1985, in the central Pacific, and lasted until November 30, 1985. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. At the time, the 1985 season was the most active on record in the eastern north Pacific, with 28 tropical cyclones forming. Of those, 24 were named, 13 reached hurricane intensity, and 8 became major hurricanes by attaining Category 3 status or higher on the Saffir–Simpson scale. At that time, the 24 named storms was a record; however, this record was broken seven years later in 1992, and was therefore recognized as the second busiest season within the basin, until it was surpassed exactly thirty years later by the 2015 season.
The 1984 Pacific hurricane season featured numerous tropical cyclones, several of which were impactful to land. It was a busy hurricane season with 21 named storms, 13 hurricanes, and 7 major hurricanes, the latter of which are Category 3 or stronger cyclones on the Saffir–Simpson scale. This activity was unusual given the presence of a La Niña, which typically suppresses Central and East Pacific tropical cyclone activity, and only average sea surface temperatures. Seasonal activity began on May 17 and ended on November 8. This lies within the confines of a traditional hurricane season which begins on May 15 in the East Pacific and June 1 in the Central Pacific, and ends on November 30 in both basins. These dates conventionally delimit the period during each year when most tropical cyclones form.
The 1980 Pacific hurricane season officially started May 15, 1980, in the eastern Pacific and June 1, 1980, in the central Pacific, lasting until November 30, 1980. These dates conventionally delimit each year when most tropical cyclones form in the northeastern and central Pacific Ocean. This season was relatively uneventful; since no tropical cyclones made landfall, there were no reports of casualties or damage.
The 1976 Pacific hurricane season was a very deadly and costly season. Hurricanes Kathleen, Liza, and Madeline were the most notable storms this year. Hurricane Kathleen caused death and destruction in California and Arizona due to flooding. Hurricane Liza was the deadliest storm of the season when it killed over 600 people in Mexico. Hurricane Madeline is notable for being one of the most intense Pacific hurricanes at landfall.
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 1978 Pacific hurricane season was the first Pacific hurricane season to use both masculine and feminine names for tropical cyclones. It also began the modern practice of utilizing naming lists every six years. Despite lacking an El Niño, a common driver of enhanced activity in the East and Central Pacific basins, the 1978 season was active. It featured 19 named storms, 14 hurricanes, and 7 major hurricanes, the latter of which are Category 3 or stronger cyclones on the Saffir–Simpson scale. Within the confines of the Central Pacific basin, located between the International Date Line and 140°W, 13 tropical cyclones or their remnants were observed by forecasters at the Central Pacific Hurricane Center, a record number of occurrences at the time. Seasonal activity began on May 30 and ended on October 21, within the limits of a traditional hurricane season which begins on May 15 in the East Pacific and June 1 in the Central Pacific. The season ends on November 30 in both basins. These dates conventionally delimit the period during each year when most tropical cyclones form.
The 1972 Pacific hurricane season was an ongoing event in tropical cyclone meteorology. There were few notable storms this year. Only one person was killed and storm effects were almost not serious at all. The most notable systems were Hurricane Celeste and Joanne. Celeste was the strongest storm of the season, and caused heavy damage to Johnston Atoll. Hurricane Joanne brought gale-force winds to the Continental United States and caused flooding in Arizona and northern Mexico, which killed one person. The only other system to directly impact land was Hurricane Annette.
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.
The 1949 Pacific hurricane season was the first hurricane season in the Eastern Pacific hurricane database. Six tropical cyclones were known to have existed during the season, of which the first formed on June 11 and the final dissipated on September 30. Another tropical cyclone had formed within the basin in 1949, but was included in the Atlantic hurricane database, had it been classified operationally in the Eastern Pacific basin, would have tallied the overall season to seven tropical cyclones. In addition, there were two tropical cyclones that attained hurricane status, but none of them reached major hurricane intensity. Tropical Storm Three threatened the Baja California Peninsula, while an unnumbered hurricane crossed into the Atlantic, later becoming the 1949 Texas hurricane.
The 1968 Pacific hurricane season ties the record for having the most active August in terms of tropical storms. It officially started on May 15, 1968, in the eastern Pacific and June 1 in the central Pacific and lasted until November 30, 1968. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean.
Hurricane Tara was one of the deadliest Pacific hurricanes on record. The final tropical cyclone of the 1961 Pacific hurricane season, Tara formed on November 10 about 230 mi (365 km) off the coast of Mexico. It strengthened to reach maximum sustained winds of 85 mph (140 km/h) before making landfall in the Mexican state of Guerrero near Zihuatanejo. Hurricane Tara dissipated on November 12, bringing heavy rainfall and strong winds to locations inundated by 10 days of precipitation. Damage was light in the major port city of Acapulco, though further west along the coast, the effects of Tara were much worse. The city of Nuxco in Tecpan de Galeana municipality received the most damage and deaths from the hurricane. Throughout Mexico, at least 436 fatalities were reported, and damage exceeded $16 million.
The 1963 Pacific hurricane season was a below-average season, with 8 storms and 4 hurricanes forming. The season ran through the summer and fall of 1963.
Hurricane Madeline was the second landfalling major hurricane along the Pacific coast of Mexico in a week. Madeline formed on September 29, not far from Central America. The next day, the circulation dissipated, and as a result weakened to a remnant low. Four days later, on October 3, the low regenerated into a tropical depression. The system remained weak for three days as it drifted west-northwest. When it began to recurve towards Mexico on October 6, the cyclone rapidly intensified and eventually made landfall at peak intensity as a Category 4. Shortly after landfall, the cyclone rapidly dissipated.
The 1965 Pacific hurricane season officially started May 15, 1965, in the eastern Pacific, and June 1, 1965, in the central Pacific, and lasted until November 30, 1965. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeast Pacific Ocean. A total of ten systems were observed. The most notable storm was Tropical Storm Hazel, which killed six people in Mexico.
