The 1900s Pacific hurricane seasons all began on May 15 of their respective years in the eastern north Pacific Ocean and on June 1 in the central north Pacific. They ended on November 30, of each year. These dates conventionally delimit the time of year when most tropical cyclones form in northeast Pacific Ocean tropical cyclone basin, between the International Date Line and the west coast of North America. However, tropical cyclone formation is possible at any time of the year. Before the dawn of the satellite era in the 1960s, data on Pacific hurricanes is extremely unreliable. For a few years, there are no reported cyclones, although many systems likely formed and went undocumented.
| Pacific hurricane seasons |
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A "tropical hurricane" formed south of southwestern mainland Mexico on July 19, and moved generally westward out into the tropical Pacific, last noted well west-southwest of Baja California on July 29. [1]
A "tropical hurricane" formed south of southern Mexico on July 19, moving west-northwest through July 27, when it was last seen west of Baja California. [1]
I. Forming on July 14, a tropical cyclone made landfall on the southern portion of Baja California on July 22 as it moved northward and dissipated. [1] The remnants produced 1 to 2 inches (25 to 50 mm) of rain over southern California on July 20 and 21. This storm occurred during the strong El Niño of 1901–1902.
II. On August 29, a "tropical hurricane" was noted between mainland Mexico and Hawaii. The cyclone moved north of due west, last seen about 1,000 miles (1,600 km) east-southeast of Hilo on September 1. [1]
III. Between September 18 and 20, a "tropical hurricane" moved just offshore the west coast of Baja California. [1]
IV. A tropical depression formed on October 3. It moved north. After crossing the Isthmus of Tehuantepec, it emerged into the Gulf of Mexico. It eventually became Atlantic Hurricane 4 before making landfall in the Florida Panhandle as a tropical storm.
V. On October 17, a "tropical hurricane" formed just east of the International Dateline, moving westward through the 20th, before looping back towards the east on October 21 and 22. [1]
VI. On December 23, a storm formed 40 miles (60 km) to the southwest of Lanai, Hawaii. Possibly a Kona, or Subtropical storm, it moved northwestward and strengthened. After approaching the International Date Line, it turned to the northeast, and dissipated in the Bering Sea on January 2, 1903. It is unknown if the storm was tropical, but based on its track it had some tropical characteristics. Upon moving through the Hawaiian islands, the storm was disorganized, and caused no reported damage or unusual weather on the islands. The storm is known as the Froc Cyclone, named after Rev. Louis Froc, the Director of the Ziwakei Observatory in Shanghai who discovered the storm.
I. A "tropical hurricane" formed near the 170th meridian west longitude on September 7, moving northward past Wake Island into the far north Pacific on September 11. [1]
II. A "tropical hurricane" formed between Mexico and Hawaii on September 24, moving slightly north of due west. The system dissipated about 800 miles (1,300 km) southeast of Hilo on September 29. [1]
I. A tropical storm was first observed 250 miles (400 km) southwest of Honolulu, Hawaii, on November 26. It tracked to the northwest, then turned to the northeast. The storm weakened over the cold northern Pacific waters, and dissipated on December 4 to the south of Sitka, Alaska. The storm caused no reported damage. This storm is known as the Zikawei Cyclone, named after the Zikawei Observatory which recorded the storm.
II. On December 23 a tropical storm formed 230 miles (370 km) south-southwest of South Point, Hawaii. It moved to the west-northwest, and after crossing the date line it turned to the northeast, dissipating on the 30th. The storm is known as the Hurd Cyclone.
A "tropical hurricane" formed offshore southwestern Mexico on June 29, which made a partial loop on June 30 and July 1 before turning eastward, dissipating south of Mexico on July 3. [2]
I. The Gauthier Cyclone formed on 3 May well southeast of the Big Island and moved west-northwestward. It passed to the south of Hawaii, crossed the date line, and turned to the northeast. The storm dissipated in the Bering Sea on 10 May. This extremely rare May central Pacific tropical cyclone occurred during the normally storm-free month of May.
II. A tropical storm formed just off Acapulco circa 11 August and moved north-northwestward through the Gulf of California. [3] It entered southern California on 18 August, dropping 3.49 inches (89 mm) of rain at Needles, California, in 24 hours.
III. A "tropical hurricane" formed offshore southwestern Mexico on 23 September, moving north-northwestward to just offshore the southwest tip of Baja California on 28/29 September before dissipating. [2]
IV. On 2 October, a "tropical hurricane" formed offshore southern Mexico. The system moved initially westward and then northward towards Manzanillo on 4 October. [2] The storm ultimately traveled just west of Baja California and reached Ensenada, Baja California, on 10 October before dissipating without significant effect in California. [4]
V. On 2 October, a tropical storm was first observed 120 miles (190 km) southeast of Hilo, Hawaii. It moved to the northeast and struck the southern tip of Niihau before turning northward. After passing through the islands, it turned to the northeast, and dissipated in the Bering Sea on 9 October. The storm, the Makawao Cyclone, caused 12.7 inches (320 mm) of torrential rainfall in Makawao, Hawaii.
VI. A tropical storm was first observed on 6 November 90 miles (140 km) south of Honolulu, Hawaii. It moved to the north-northwest and passed through the Kauai channel. It turned to the northeast and dissipated on the 13 November to the west of British Columbia. This extremely small, disorganized storm caused no known damage in Hawaii.
I. A "tropical hurricane" formed between Mexico and Hawaii on 15 July. The system moved west-northwest, dissipating about 1,500 miles (2,400 km) east of Hilo on 18 July. [2]
II. A "tropical hurricane" formed between Mexico and Hawaii, well southeast of the previous system, on 18 July. This system moved north of due west, dissipating about 1,600 miles (2,600 km) east of Hilo on 22 July. [2]
A vortex, possibly a tropical cyclone, was first observed on 17 October to the northwest of Hawaii. It moved quickly northeastward, and dissipated the next day.
There are no known tropical cyclones.
The 2004 Pacific hurricane season was unusual in that no tropical cyclones of at least tropical storm intensity made landfall, the first such occurrence since 1991. The season was also below-average in terms of named storms and hurricanes, near-average in terms of major hurricanes. The season officially began on May 15 in the eastern Pacific, and on June 1 in the central Pacific; it officially ended in both basins on November 30. These dates conventionally delimit the period during each year when a majority of tropical cyclones form. The season was reflected by an accumulated cyclone energy (ACE) index of 71 units.
The 2003 Pacific hurricane season was the first season to feature no major hurricanes – storms of Category 3 intensity or higher on the Saffir–Simpson hurricane wind scale (SSHWS) – since 1977. The dates conventionally delimiting the period when most tropical cyclones form in the Pacific Ocean are May 15 in the Eastern Pacific Ocean and June 1 in the Central Pacific, with both seasons ending on November 30. The 2003 season featured 16 tropical storms between May 19 and October 26; 7 of these became hurricanes, which was then considered an average season. Damage across the basin reached US$129 million, and 23 people were killed by the storms.
The 2001 Pacific hurricane season was a relatively near-average Pacific hurricane season which produced sixteen named storms, though most were rather weak and short-lived including one unnamed tropical storm which was operationally recognized as a tropical depression, the first such occurrence since 1996. Only eight hurricanes formed and two major hurricanes. The season officially began on May 15 in the East Pacific Ocean, and on June 1 in the Central Pacific; they ended on November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Pacific basin. However, the formation of tropical cyclones is possible at any time of the year.
The 1999 Pacific hurricane season was one of the least active Pacific hurricane seasons on record. The season officially began on May 15 in the Eastern Pacific, and on June 1 in the Central Pacific; in both basins, it ended on November 30. These dates conventionally delimit the period during which most tropical cyclones form in the northeastern Pacific Ocean. The first tropical cyclone of the season, Hurricane Adrian, developed on June 18, while the final storm of the season, Tropical Storm Irwin, dissipated on October 11. No storms developed in the Central Pacific during the season. However, two storms from the Eastern Pacific, Dora and Eugene, entered the basin, with the former entering as a hurricane and becoming the second farthest travelling Pacific hurricane on record.
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 1990 Pacific hurricane season was a very active season which observed 21 named storms within the basin. The season also produced the fourth highest ACE index value on record. The season was 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 most tropical cyclones form in the northeastern Pacific Ocean. However, the formation of tropical cyclones is possible at any time of the year, as illustrated in 1990 by the formation of the season's first named storm, Hurricane Alma, on May 12. At the time, this was the earliest formation of a tropical storm on record in the eastern Pacific
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 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 1982 Pacific hurricane season, with 23 named storms, ranks as the fourth-most active Pacific hurricane season on record, tied with 2018. It was at that time the most active season in the basin until it was later surpassed by the 1985 season. It officially started June 1, 1982, in the eastern Pacific, and June 1, 1982, in the central Pacific, and lasted until October 31, 1982, in the central Pacific and until November 15, 1982, in the Eastern Pacific. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. At that time, the season was considered as the most active season within the basin in terms of named storms, however, the 1985 season surpassed these numbers just three years later.
The 1979 Pacific hurricane season was an inactive season, featuring 10 named storms, 6 hurricanes, and 4 major hurricanes. It featured zero tropical cyclones in the Central Pacific, the most recent occurrence on record as of 2023. An average year sees four to five tropical cyclones in that basin.
The 1920-24 Pacific hurricane seasons all began on May 15 of their respective years in the eastern north Pacific Ocean and on June 1 in the central north Pacific. They ended on November 30, of each year. These dates conventionally delimit the time of year when most tropical cyclones form in northeast Pacific Ocean tropical cyclone basin, between the International Date Line and the west coast of North America. However, tropical cyclone formation is possible at any time of the year. Before the dawn of the satellite era in the 1960s, data on Pacific hurricanes is extremely unreliable. For a few years, there are no reported cyclones, although many systems likely formed and went undocumented.
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 1970 Pacific hurricane season began on May 15, 1970 in the east Pacific, and on June 1, 1970 in the central Pacific. It ended on November 30, 1970. These dates conventionally delimit the period of time when tropical cyclones form in the eastern Pacific Ocean.
The 1960 Pacific hurricane season was an event in the annual seasons of Tropical Cyclone development. It officially started on May 15, 1960, in the eastern Pacific and lasted until November 30, 1960. The 1960 season was the first season that Eastern Pacific hurricanes were named.
The 1962 Pacific hurricane season was a moderately active Pacific hurricane season that included two hurricane landfalls. The 1962 Pacific hurricane season officially started on May 15, 1962 in the eastern Pacific and June 1, 1962 in the Central Pacific Hurricane Center's area of responsibility and lasted until November 30, 1962 in both regions. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean.
The 1957 Pacific hurricane season was a moderately active year in which 13 tropical cyclones formed. The hurricane season ran through the summer and fall months which conventionally delimit the period during which most tropical cyclones form in the northeastern Pacific Ocean. The first tropical cyclone developed on July 15. The final storm dissipated on December 6, becoming one of the few Pacific storms to exist outside of the seasonal dates. Of the season's 13 storms, five of these formed or crossed into the central Pacific.
The 1958 Pacific hurricane season saw thirteen tropical systems. It officially started on May 15, 1958, in the eastern Pacific and lasted until November 30, 1958.
The 1950 Pacific hurricane season was notable for one of the storms being the third-wettest tropical cyclone in United States history. Seven known tropical cyclones occurred during the season, the earliest of which formed on June 14 and the latest of which dissipated on October 3. These dates fall within the range of most Eastern Pacific tropical cyclone activity.
The 1910s Pacific hurricane seasons all began on May 15 of their respective years in the eastern north Pacific Ocean and on June 1 in the central north Pacific. They ended on November 30 of each year. These dates conventionally delimit the time of year when most tropical cyclones form in northeast Pacific Ocean tropical cyclone basin, between the International Date Line and the west coast of North America. However, tropical cyclone formation is possible at any time of the year. Before the dawn of the satellite era in the 1960s, data on Pacific hurricanes is extremely unreliable. For a few years, there are no reported cyclones, although many systems likely formed and went undocumented.
