A Pacific hurricane is a tropical cyclone that develops within the northeastern and central Pacific Ocean to the east of 180°W, north of the equator. For tropical cyclone warning purposes, the northern Pacific is divided into three regions: the eastern (North America to 140°W), central (140°W to 180°), and western (180° to 100°E), while the southern Pacific is divided into 2 sections, the Australian region (90°E to 160°E) and the southern Pacific basin between 160°E and 120°W. Identical phenomena in the western north Pacific are called typhoons. This separation between the two basins has a practical convenience, however, as tropical cyclones rarely form in the central north Pacific due to high vertical wind shear, and few cross the dateline.

List of seasons +Historical storm formation by month between 1990 and 2020

Period Seasons Pre-1920s Before 1900, 1900s, 1910s 1920s 1920–1924, 1925, 1926, 1927, 1928, 1929 1930s 1930, 1931, 1932, 1933, 1934, 1935, 1936, 1937, 1938, 1939 1940s 1940, 1941, 1942–1948, 1949 1950s 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959 1960s 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969 1970s 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979 1980s 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989 1990s 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 2000s 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 2010s 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 2020s 2020, 2021, 2022, 2023, 2024, 2025, 2026

1950s Year Strongeststorm Deaths Damages(USD) Notes 1950 – 7 6 0 Hiki 1 Unknown Includes Hiki, the third wettest tropical cyclone in the United States. 1951 – 9 2 0 Two Eight 0 Unknown 1952 – 7 3 0 Five Seven 0 Unknown 1953 – 4 2 0 One 0 Unknown 1954 11 11 4 0 Seven 40 Unknown 1955 – 6 2 0 One 0 Unknown 1956 – 11 7 0 One 0 Unknown 1957 – 13 9 1 Twelve 21 $100,000 1958 14 14 5 0 Eleven 0 Unknown 1959 15 15 5 3 Patsy >1,800 $280 million Patsy was the first known category 5 hurricane in the Central Pacific basin. Includes the deadliest tropical cyclone in the Eastern Pacific, the 1959 Mexico hurricane.

1960s Year Strongeststorm Deaths Damages(USD) Notes 1960 8 8 5 0 Estelle 0 Unknown 1961 11 10 2 0 Iva 436 $16 million 1962 18 12 2 0 Doreen Unknown $11 million 1963 8 8 4 0 Mona Unknown Unknown 1964 6 6 2 0 Odessa Unknown Unknown Least active season since 1953. 1965 11 10 1 0 Emily 6 $10 million 1966 18 13 8 0 Connie 9+ $5.6 million Includes the farthest traveled storm in the Eastern Pacific, Blanca. 1967 17 17 6 1 Olivia 121 Unknown 1968 26 20 6 0 Rebecca 9 Unknown Tied with 2009 for having the most storms named in the month of August. 1969 15 10 4 0 Doreen 10 Unknown Includes the latest first-named storm at that time, Ava, which formed in July.

1970s Year ACE Strongeststorm Deaths Damages(USD) Notes 1970 21 19 5 0 Lorraine 22 Unknown 1971 22 18 12 6 139 Olivia 52 $40 million First year of reliable records in the eastern and central Pacific basins. 1972 20 14 9 4 136 Celeste 1 $75,000 1973 18 12 7 3 114 Ava 0 Unknown Featured the strongest hurricane in the basin at the time and the earliest category 5 in the Eastern Pacific on record. Ava was also the first known category 5 Pacific hurricane east of 140°W. 1974 25 18 11 3 90 Maggie 18–33 $4 million Featured one of the most active periods of tropical cyclones on record with five existing simultaneously (Ione, Joyce, Kirsten, Lorraine, and Maggie). 1975 21 17 9 4 112 Denise 30 $20 million 1976 19 15 9 5 121 Annette 614–964 $360 million 1977 17 8 4 0 22 Florence 8 $39.6 million Least active season in terms of tropical storms, tied with 2010; tied for lowest number of hurricanes until 2010.Featured no major hurricanes, a feat later repeated in 2003. 1978 25 19 14 7 207 Fico Hector Norman 4 $301 million First season to use masculine and feminine names. 1979 13 10 6 4 57 Ignacio Unknown Unknown Most recent year in which no tropical cyclones crossed into the Central Pacific basin. Total 201 150 86 36 1110 Ava 767–1,102 ≥$385.075 million

1980s Year ACE Strongeststorm Deaths Damages(USD) Notes 1980 16 15 7 3 77 Kay 0 Unknown 1981 17 15 8 1 72 Norma 79 $134 million 1982 30 23 12 5 161 Olivia 1,937 $1.3 billion Fifth most active season on record. 1983 26 21 12 8 206 Kiko 168 $303.33 million Tied with 1984 for the fourth most active season at the time. 1984 26 21 13 7 193 Douglas 21 Unknown Tied with 1983 for the fourth most active season at the time. 1985 28 24 12 8 192 Rick 1 $1 million Third most active season on record. Tied with 2018 and 2025 for the most named storms on record in the month of June. (5) Tied with 2015 and 2016 for the most active month of July since reliable records began. 1986 26 17 9 3 107 Roslyn 2 $352 million 1987 20 20 10 4 132 Max 3 $144.22 million Last year in which the Eastern Pacific Hurricane Center was the primary warning center for tropical cyclones in the eastern Pacific Ocean. 1988 23 15 7 3 127 Hector 24 Unknown Hurricane Joan crossed over Central America and was named Miriam in the Eastern Pacific basin. 1989 25 18 9 4 110 Raymond 14 $1.75 million Total 237 189 99 46 1377 Max 2,250 ≥$2.240 billion

1990s Year ACE Strongeststorm Deaths Damages(USD) Notes 1990 27 21 16 6 245 Trudy 19 $12.5 million Fifth most active season on record and third most active in terms of ACE. Tied with 1992, 2014, and 2015 for the most hurricanes in a single season. 1991 16 14 10 5 178 Kevin 11 Unknown 1992 30 27 16 10 295 Tina 25 $3.15 billion Most active Pacific hurricane season on record. Second-most active Pacific hurricane season on record in terms of ACE. Tied with 1990, 2014, and 2015 for the most hurricanes in a single season. Includes the strongest hurricane on record to strike Hawaii, Iniki. Hurricane Ekeka is the most intense off-season hurricane in the Pacific basin. Third costliest Pacific hurricane season on record. 1993 18 15 11 9 201 Lidia 50 $40 million 1994 23 20 10 5 185 Gilma 26 $735 million Tied with 2002 and 2018 for having the most category 5 hurricanes in a single season. Includes the tropical cyclone that travelled the farthest distance on record, Hurricane John. It was also the longest-lasting tropical cyclone ever observed until surpassed by Cyclone Freddy in 2023. 1995 11 10 7 3 100 Juliette 124 $31 million Least active season since 1979. 1996 14 9 5 2 53 Douglas 48 $813,000 Tied with 2021 for the most hurricanes to strike Mexico in a single season. Hurricane Cesar crossed over from Central America and was renamed Douglas in the Pacific basin. 1997 24 19 9 7 167 Linda 261–531 $551 million Hurricane Linda was the most intense hurricane in the Pacific basin until Patricia in 2015, and later, Polo in 2026. 1998 16 13 9 6 134 Howard 54 $760 million 1999 14 9 6 2 90 Dora 16 None Total 193 157 99 55 1,648 Linda 581–853 ≥$4.9 billion

2000s Year ACE Strongeststorm Deaths Damages(USD) Notes 2000 21 19 6 2 95 Carlotta 27 2001 19 15 8 2 90 Juliette 13 2002 19 15 8 6 124 Kenna 7 Tied with 1994 and 2018 for having the most category 5 hurricanes in a single season. Includes the fifth most intense hurricane in the Pacific basin, Kenna. 2003 17 16 7 0 56 Nora 23 Featured no major hurricanes, tied with 1977. 2004 18 12 6 3 71 Javier 0 None 2005 17 15 7 2 96 Kenneth 6 2006 25 19 11 6 155 Ioke 14 Most active since 2000. Includes the most intense hurricane in the Central Pacific basin, Ioke. 2007 15 11 4 1 52 Flossie 42 Tied with 1977 for having the lowest number of hurricanes until the 2010 season. 2008 19 17 7 2 83 Norbert 45 2009 23 20 8 5 127 Rick 16 Most active since 1994. Tied with 1968 for having the most storms named in the month of August. Includes the fourth most intense hurricane in the Pacific basin, Rick. Total Rick ≥

2010s Year ACE Strongeststorm Deaths Damages(USD) Notes 2010 13 8 3 2 51 Celia 268 $1.62 billion Least active Pacific hurricane season on record, tied with 1977. Record low number of hurricanes (3).Includes a Category 5 hurricane in the basin, Celia.Includes a rare off-season in December, Omeka. 2011 13 11 10 6 120.9 Dora 49 >$204 million 2012 17 17 10 5 98.5 Emilia 8 $28 million 2013 21 20 9 1 74.9 Raymond 183 $4.47 billion Second costliest Pacific hurricane season on record. Most recent to have fewer than two major hurricanes. 2014 23 22 16 9 202.4 Marie 50 >$2.09 billion Fourth most active season on record. Tied with 1990, 1992, and 2015 for the most hurricanes in a single season. 2015 31 26 16 11 290.6 Patricia 45 $588 million Second most active season on record. Includes the most intense hurricane in the Pacific basin, Patricia. Tied with 1990, 1992, and 2014 for the most hurricanes in a single season. Tied with 1985 and 2016 for the most active month of July since reliable records began. Latest ending to a season on record. 2016 23 22 13 6 184.8 Seymour 18 $95.8 million Earliest start on record in the Pacific basin. Fourth most active season on record. Tied with 1985 and 2015 for the most active month of July since reliable records began. Agatha was the latest forming first-named storm on record in the Eastern Pacific since reliable records began. 2017 20 18 9 4 100.8 Fernanda 45 $377.28 million 2018 26 23 13 10 318 Walaka 59 >$1.64 billion Fourth-most active season on record.Most active Pacific hurricane season on record in terms of ACE. Tied with 1985 and 2025 for the most named storms on record in the month of June (5).Tied with 1994, 2002, and 2026 for having the most Category 5 hurricanes in a single season. 2019 21 19 7 4 97.6 Barbara 12 $212 million Third-latest first named storm since reliable records began in 1971.No hurricanes formed in August for the first time since 1973. Total Patricia ≥

2020s