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((Short description|Mature tropical cyclone that develops within the eastern and central Pacific Ocean))
((About|tropical cyclones that form in the Northern Hemisphere east of the [[International Date Line]]|storms that form in the southern hemisphere, also occasionally known as hurricanes|South Pacific tropical cyclone))
((More citations needed|date=May 2019))
((Use American English|date=August 2023))
((Use mdy dates|date=August 2023))
[[File:East pacific tc climatology.png|thumb|upright=1.2|Cumulative average number of [[tropical cyclone]]s in the north Pacific]]
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.<ref>((cite web|url=http://www.aoml.noaa.gov/hrd/tcfaq/A1.html|title=Subject: A1) What is a hurricane, typhoon, or tropical cyclone?|author=Chris Landsea|publisher=Atlantic Oceanographic and Meteorological Laboratory|date=July 15, 2011|access-date=July 2, 2012))</ref> Identical phenomena in the western north Pacific are called [[typhoon]]s. 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==
{| style="float:center" class="wikitable"|
|+Historical storm formation by month between 1990 and 2020<!--up to 2020/10/04-->
|(( #invoke:Chart | bar chart
| height = 500
| width = 600
| stack = 1
| group 1 = 0 : 0 : 0 : 0 :  0 :  1 :  4 :  5 :  2 :  4 :  0 : 0
| group 2 = 0 : 0 : 0 : 0 :  4 :  9 : 20 : 22 : 22 :  7 :  2 : 0
| group 3 = 1 : 0 : 0 : 0 :  2 :  2 : 14 :  8 :  8 :  7 :  0 : 0
| group 4 = 1 : 0 : 0 : 0 :  1 :  6 : 10 : 11 :  7 :  7 :  3 : 0
| group 5 = 0 : 0 : 0 : 0 :  3 : 12 : 19 : 20 : 26 : 10 :  0 : 0
| group 6 = 0 : 0 : 1 : 0 : 14 : 29 : 43 : 58 : 43 : 35 : 10 : 1
| group 7 = 0 : 0 : 0 : 1 :  3 : 14 : 20 : 24 : 15 : 12 :  5 : 1
| group names = Category 5 : Category 4 : Category 3 : Category 2 : Category 1 : Tropical storm : Tropical depression
| colors = #a188fc : #ff738a : #ff9e59 : #ffd98c : #ffffc0 : #4dffff : #6ec1ea
| x legends = <small>Jan</small> : <small>Feb</small> : <small>Mar</small> : <small>Apr</small> : <small>May</small> : <small>Jun</small> : <small>Jul</small> : <small>Aug</small> : <small>Sep</small> : <small>Oct</small> : <small>Nov</small> : <small>Dec</small>
))
|}

{| class="wikitable"
|-
! scope="col" | Period !! scope="col" | Seasons
|-
! scope="row" style="text-align: right;" | Pre-1920s
| [[List of Pacific hurricanes before 1900|Before 1900]], [[1900s Pacific hurricane seasons|1900s]], [[1910s Pacific hurricane seasons|1910s]]
|-
! scope="row" style="text-align: right;" | 1920s
| [[1920–1924 Pacific hurricane seasons|1920–1924]], [[1925 Pacific hurricane season|1925]], [[1926 Pacific hurricane season|1926]], [[1927 Pacific hurricane season|1927]], [[1928 Pacific hurricane season|1928]], [[1929 Pacific hurricane season|1929]]
|-
! scope="row" style="text-align: right;" | 1930s
| [[1930 Pacific hurricane season|1930]], [[1931 Pacific hurricane season|1931]], [[1932 Pacific hurricane season|1932]], [[1933 Pacific hurricane season|1933]], [[1934 Pacific hurricane season|1934]], [[1935 Pacific hurricane season|1935]], [[1936 Pacific hurricane season|1936]], [[1937 Pacific hurricane season|1937]], [[1938 Pacific hurricane season|1938]], [[1939 Pacific hurricane season|1939]]
|-
! scope="row" style="text-align: right;" | 1940s
| [[1940 Pacific hurricane season|1940]], [[1941 Pacific hurricane season|1941]], [[1942–1948 Pacific hurricane seasons|1942–1948]], [[1949 Pacific hurricane season|1949]]
|-
! scope="row" style="text-align: right;" | 1950s
| [[1950 Pacific hurricane season|1950]], [[1951 Pacific hurricane season|1951]], [[1952 Pacific hurricane season|1952]], [[1953 Pacific hurricane season|1953]], [[1954 Pacific hurricane season|1954]], [[1955 Pacific hurricane season|1955]], [[1956 Pacific hurricane season|1956]], [[1957 Pacific hurricane season|1957]], [[1958 Pacific hurricane season|1958]], [[1959 Pacific hurricane season|1959]]
|-
! scope="row" style="text-align: right;" | 1960s
| [[1960 Pacific hurricane season|1960]], [[1961 Pacific hurricane season|1961]], [[1962 Pacific hurricane season|1962]], [[1963 Pacific hurricane season|1963]], [[1964 Pacific hurricane season|1964]], [[1965 Pacific hurricane season|1965]], [[1966 Pacific hurricane season|1966]], [[1967 Pacific hurricane season|1967]], [[1968 Pacific hurricane season|1968]], [[1969 Pacific hurricane season|1969]]
|-
! scope="row" style="text-align: right;" | 1970s
| [[1970 Pacific hurricane season|1970]], [[1971 Pacific hurricane season|1971]], [[1972 Pacific hurricane season|1972]], [[1973 Pacific hurricane season|1973]], [[1974 Pacific hurricane season|1974]], [[1975 Pacific hurricane season|1975]], [[1976 Pacific hurricane season|1976]], [[1977 Pacific hurricane season|1977]], [[1978 Pacific hurricane season|1978]], [[1979 Pacific hurricane season|1979]]
|-
! scope="row" style="text-align: right;" | 1980s
| [[1980 Pacific hurricane season|1980]], [[1981 Pacific hurricane season|1981]], [[1982 Pacific hurricane season|1982]], [[1983 Pacific hurricane season|1983]], [[1984 Pacific hurricane season|1984]], [[1985 Pacific hurricane season|1985]], [[1986 Pacific hurricane season|1986]], [[1987 Pacific hurricane season|1987]], [[1988 Pacific hurricane season|1988]], [[1989 Pacific hurricane season|1989]]
|-
! scope="row" style="text-align: right;" | 1990s
| [[1990 Pacific hurricane season|1990]], [[1991 Pacific hurricane season|1991]], [[1992 Pacific hurricane season|1992]], [[1993 Pacific hurricane season|1993]], [[1994 Pacific hurricane season|1994]], [[1995 Pacific hurricane season|1995]], [[1996 Pacific hurricane season|1996]], [[1997 Pacific hurricane season|1997]], [[1998 Pacific hurricane season|1998]], [[1999 Pacific hurricane season|1999]]
|-
! scope="row" style="text-align: right;" | 2000s
| [[2000 Pacific hurricane season|2000]], [[2001 Pacific hurricane season|2001]], [[2002 Pacific hurricane season|2002]], [[2003 Pacific hurricane season|2003]], [[2004 Pacific hurricane season|2004]], [[2005 Pacific hurricane season|2005]], [[2006 Pacific hurricane season|2006]], [[2007 Pacific hurricane season|2007]], [[2008 Pacific hurricane season|2008]], [[2009 Pacific hurricane season|2009]]
|-
! scope="row" style="text-align: right;" | 2010s
| [[2010 Pacific hurricane season|2010]], [[2011 Pacific hurricane season|2011]], [[2012 Pacific hurricane season|2012]], [[2013 Pacific hurricane season|2013]], [[2014 Pacific hurricane season|2014]], [[2015 Pacific hurricane season|2015]], [[2016 Pacific hurricane season|2016]], [[2017 Pacific hurricane season|2017]], [[2018 Pacific hurricane season|2018]], [[2019 Pacific hurricane season|2019]]
|-
! scope="row" style="text-align: right;" | 2020s
| [[2020 Pacific hurricane season|2020]], [[2021 Pacific hurricane season|2021]], [[2022 Pacific hurricane season|2022]], [[2023 Pacific hurricane season|2023]], [[2024 Pacific hurricane season|2024]]
|}

===1950s===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[1950 Pacific hurricane season|1950]] || – || 7 || 6 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[Hurricane Hiki|Hiki]] || 1 || Unknown || Includes Hiki, the [[List of wettest tropical cyclones in the United States|third wettest]] tropical cyclone in the [[United States]].
|-
| [[1951 Pacific hurricane season|1951]] || – || 9 || 2 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1951 Pacific hurricane season#Hurricane Two|Two]] <br /> ((color box|((storm color|1))|'''1'''|border=silver)) [[1951 Pacific hurricane season#Hurricane Eight|Eight]] || 0 || Unknown ||
|-
| [[1952 Pacific hurricane season|1952]] || – || 7 || 3 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1952 Pacific hurricane season#Hurricane Five|Five]] <br /> ((color box|((storm color|1))|'''1'''|border=silver)) [[1952 Pacific hurricane season#Hurricane Seven|Seven]] || 0 || Unknown ||
|-
| [[1953 Pacific hurricane season|1953]] || – || 4 || 2 || 0 || ((color box|((storm color|TS))|'''TS'''|border=silver)) [[1953 Pacific hurricane season#Tropical Storm One|One]] || 0 || Unknown ||
|-
| [[1954 Pacific hurricane season|1954]] || 11 || 11 || 4 || 0 || ((color box|((storm color|TS))|'''TS'''|border=silver)) [[1954 Pacific hurricane season#Tropical Storm Seven|Seven]] || 40 || Unknown ||
|-
| [[1955 Pacific hurricane season|1955]] || – || 6 || 2 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1955 Pacific hurricane season#Hurricane One|One]] || 0 || Unknown ||
|-
| [[1956 Pacific hurricane season|1956]] || – || 11 || 7 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1956 Pacific hurricane season#Hurricane One|One]] || 0 || Unknown ||
|-
| [[1957 Pacific hurricane season|1957]] || – || 13 || 9 || 1 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1957 Pacific hurricane season#Hurricane Twelve|Twelve]] || 21 || $100,000 ||
|-
| [[1958 Pacific hurricane season|1958]] || 14 || 14 || 5 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1958 Pacific hurricane season#Hurricane Eleven|Eleven]] || 0 || Unknown ||
|-
| [[1959 Pacific hurricane season|1959]] || 15 || 15 || 5 || 3 || ((color box|((storm color|5))|'''5'''|border=silver)) [[1959 Pacific hurricane season#Hurricane Patsy|Patsy]] || >1,800 || $280 million || Patsy was the first known category 5 hurricane in the Central Pacific basin. <br> Includes the deadliest tropical cyclone in the Eastern Pacific, the [[1959 Mexico hurricane]].
|-
|}

===1960s===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[1960 Pacific hurricane season|1960]] || 8 || 8 || 5 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1960 Pacific hurricane season#Hurricane Estelle|Estelle]] || 0 || Unknown ||
|-
| [[1961 Pacific hurricane season|1961]] || 11 || 10 || 2 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1961 Pacific hurricane season#Hurricane Iva|Iva]] || 436 || $16 million || 
|-
| [[1962 Pacific hurricane season|1962]] || 18 || 12 || 2 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1962 Pacific hurricane season#Hurricane Doreen|Doreen]] || Unknown || $11 million ||
|-
| [[1963 Pacific hurricane season|1963]] || 8 || 8 || 4 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1963 Pacific hurricane season#Hurricane Mona|Mona]] || Unknown || Unknown ||
|-
| [[1964 Pacific hurricane season|1964]] || 6 || 6 || 2 || 0 || ((color box|((storm color|2))|'''2'''|border=silver)) [[1964 Pacific hurricane season#Hurricane Odessa|Odessa]] || Unknown || Unknown || Least active season since [[1953 Pacific hurricane season|1953]].
|-
| [[1965 Pacific hurricane season|1965]] || 11 || 10 || 1 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1965 Pacific hurricane season#Hurricane Emily|Emily]] || 6 || $10 million ||
|-
| [[1966 Pacific hurricane season|1966]] || 18 || 13 || 8 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1966 Pacific hurricane season#Hurricane Connie|Connie]] || 9+ || $5.6 million || Includes the farthest traveled storm in the Eastern Pacific, [[1966 Pacific hurricane season#Hurricane Blanca|Blanca]].
|-
| [[1967 Pacific hurricane season|1967]] || 17 || 17 || 6 || 1 || ((color box|((storm color|3))|'''3'''|border=silver)) [[1967 Pacific hurricane season#Hurricane Olivia|Olivia]] || 121 || Unknown || 
|-
| [[1968 Pacific hurricane season|1968]] || 26 || 20 || 6 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1968 Pacific hurricane season#Hurricane Rebecca|Rebecca]] || 9 || Unknown || Tied with [[2009 Pacific hurricane season|2009]] for having the most storms named in the month of August.
|-
| [[1969 Pacific hurricane season|1969]] || 15 || 10 || 4 || 0 || ((color box|((storm color|1))|'''1'''|border=silver)) [[1969 Pacific hurricane season#Hurricane Doreen|Doreen]] || 10 || Unknown || Includes the latest first-named storm at that time, [[1969 Pacific hurricane season#Tropical Storm Ava|Ava]], which formed in July.
|-
|}

===1970s===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! [[Accumulated cyclone energy|ACE]] !! Strongest<br>storm !! Deaths!! Damages<br>(USD) !! Notes
|-
| [[1970 Pacific hurricane season|1970]] || 21 || 19 || 5 || 0 || – ||((color box|((storm color|2))|'''2'''|border=silver)) [[1970 Pacific hurricane season#Hurricane Lorraine|Lorraine]] || 22 || Unknown ||
|-
| [[1971 Pacific hurricane season|1971]] || 22 || 18 || 12 || 6 || 139 ||((color box|((storm color|3))|'''3'''|border=silver)) [[Hurricane Irene–Olivia|Olivia]] || 52 || $40 million || First year of reliable records in the eastern and central Pacific basins.
|-
|  [[1972 Pacific hurricane season|1972]] || 20 || 14 || 9 || 4 || 136 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1972 Pacific hurricane season#Hurricane Celeste|Celeste]]|| 1 || $75,000 || 
|-
| [[1973 Pacific hurricane season|1973]] || 18 || 12 || 7 || 3 || 114 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Ava|Ava]]|| 0 || Unknown || Featured the strongest hurricane in the basin at the time and the earliest category five in the Eastern Pacific on record.
|-
| [[1974 Pacific hurricane season|1974]] || 25 || 18 || 11 || 3 || 90 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1974 Pacific hurricane season#Hurricane Maggie|Maggie]] || 18–33 || $4 million || Featured one of the most active periods of tropical cyclones on record with five existing simultaneously ([[1974 Pacific hurricane season#Hurricane Ione|Ione]], [[1974 Pacific hurricane season#Hurricane Joyce|Joyce]], [[1974 Pacific hurricane season#Hurricane Kirsten|Kirsten]], [[1974 Pacific hurricane season#Tropical Storm Lorraine|Lorraine]], and [[1974 Pacific hurricane season#Hurricane Maggie|Maggie]]).
|-
| [[1975 Pacific hurricane season|1975]] || 21 || 17 || 9 || 4 || 112 ||((color box|((storm color|4))|'''4'''|border=silver)) [[1975 Pacific hurricane season#Hurricane Denise|Denise]]|| 30 || $20 million || 
|-
| [[1976 Pacific hurricane season|1976]] || 19 || 15 || 9 || 5 || 121 ||((color box|((storm color|4))|'''4'''|border=silver)) [[1976 Pacific hurricane season#Hurricane Annette|Annette]]|| 614–964 || $360 million ||
|-
| [[1977 Pacific hurricane season|1977]] || 17 || 8 || 4 || 0 || 22 || ((color box|((storm color|2))|'''2'''|border=silver)) [[1977 Pacific hurricane season#Hurricane Florence|Florence]] || 8 || $39.6 million || Least active season until [[2010 Pacific hurricane season|2010]].<br>Featured no major hurricanes, tied with [[2003 Pacific hurricane season|2003]].
|-
| [[1978 Pacific hurricane season|1978]] || 25 || 19 || 14 || 7 || 207 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Fico|Fico]] <br /> ((color box|((storm color|4))|'''4'''|border=silver)) [[1978 Pacific hurricane season#Hurricane Hector|Hector]] <br /> ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Norman (1978)|Norman]]|| 4 || $301 million || First season to use masculine and feminine names.
|-
| [[1979 Pacific hurricane season|1979]] || 13 || 10 || 6 || 4 || 57 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1979 Pacific hurricane season#Hurricane Ignacio|Ignacio]] || Unknown || Unknown ||Most recent year in which no tropical cyclones crossed into the Central Pacific basin.
|- class="sortbottom"
! Total !! 201 !! 150 !! 86 !! 36 !! 1110 !! Ava !! 767–1,102 !! ≥$385.075 million !! 
|-
|}

===1980s===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! [[Accumulated cyclone energy|ACE]] !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[1980 Pacific hurricane season|1980]] || 16 || 15 || 7 || 3 || 77 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1980 Pacific hurricane season#Hurricane Kay|Kay]] || 0 || Unknown ||
|-
| [[1981 Pacific hurricane season|1981]] || 17 || 15 || 8 || 1 || 72 || ((color box|((storm color|3))|'''3'''|border=silver)) [[Hurricane Norma (1981)|Norma]] || 79 || $134 million || 
|-
| [[1982 Pacific hurricane season|1982]] || 30 || 23 || 12 || 5 || 161 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1982 Pacific hurricane season#Hurricane Olivia|Olivia]] || 1,937 || $1.3 billion || Fifth most active season on record. 
|-
| [[1983 Pacific hurricane season|1983]] || 26 || 21 || 12 || 8 || 206 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1983 Pacific hurricane season#Hurricane Kiko|Kiko]] <br /> ((nowrap|((color box|((storm color|4))|'''4'''|border=silver)) [[1983 Pacific hurricane season#Hurricane Raymond|Raymond]])) || 168 || $303.33 million || Tied with [[1984 Pacific hurricane season|1984]] for the fourth most active season at the time.
|-
| [[1984 Pacific hurricane season|1984]] || 26 || 21 || 13 || 7 || 193 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1984 Pacific hurricane season#Hurricane Douglas|Douglas]] || 21 || Unknown || Tied with [[1983 Pacific hurricane season|1983]] for the fourth most active season at the time.
|-
| [[1985 Pacific hurricane season|1985]] || 28 || 24 || 12 || 8 || 192 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Rick (1985)|Rick]] || 1 || $1 million || Third most active season on record. <br /> Tied with [[2018 PHS|2018]] for having five named storms in the month of June. <br> Tied with [[2015 Pacific hurricane season|2015]] and [[2016 Pacific hurricane season|2016]]  for the most active month of July since reliable records began.
|-
| [[1986 Pacific hurricane season|1986]] || 26 || 17 || 9 || 3 || 107 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Roslyn (1986)|Roslyn]] || 2 || $352 million ||
|-
| [[1987 Pacific hurricane season|1987]] || 20 || 20 || 10 || 4 || 132 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1987 Pacific hurricane season#Hurricane Max|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 Pacific hurricane season|1988]] || 23 || 15 || 7 || 3 || 127 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1988 Pacific hurricane season#Hurricane Hector|Hector]] || 24 || Unknown || [[Hurricane Joan]] crossed over Central America and was named [[1988 Pacific hurricane season#Tropical Storm Miriam|Miriam]] in the Eastern Pacific basin.
|-
| [[1989 Pacific hurricane season|1989]] || 25 || 18 || 9 || 4 || 110 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Raymond (1989)|Raymond]] || 14 || $1.75 million ||
|- class="sortbottom"
! Total !! 237 !! 189 !! 99 !! 46 !! 1377 !! Max !! 2,250 !! ≥$2.240 billion !!
|-
|}

===1990s===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! [[Accumulated cyclone energy|ACE]] !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[1990 Pacific hurricane season|1990]] || 27 || 21 || 16 || 6 || 245 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1990 Pacific hurricane season#Hurricane Trudy|Trudy]] || 19 || $12.5 million || Fifth most active season on record and third most active in terms of ACE. <br> Tied with [[1992 Pacific hurricane season|1992]], [[2014 Pacific hurricane season|2014]], and [[2015 Pacific hurricane season|2015]] for the most hurricanes in a single season.
|-
| [[1991 Pacific hurricane season|1991]] || 16 || 14 || 10 || 5 || 178 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1991 Pacific hurricane season#Hurricane Kevin|Kevin]] || 11 || Unknown ||
|-
| [[1992 Pacific hurricane season|1992]] || 30 || 27 || 16 || 10 || 295 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Tina (1992)|Tina]] || 25 || $3.15 billion || Second-most active Pacific hurricane season on record in terms of ACE.<br> Tied with [[1990 Pacific hurricane season|1990]], [[2014 Pacific hurricane season|2014]], and [[2015 Pacific hurricane season|2015]] for the most hurricanes in a single season. <br> Includes the strongest hurricane on record to strike Hawaii, [[Hurricane Iniki|Iniki]]. <br>  [[Hurricane Ekeka]] is the most intense off-season hurricane in the Pacific basin.
|-
| [[1993 Pacific hurricane season|1993]] || 18 || 15 || 11 || 9 || 201 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Lidia (1993)|Lidia]] || 50 || $40 million || 
|-
| [[1994 Pacific hurricane season|1994]] || 23 || 20 || 10 || 5 || 185 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Gilma (1994)|Gilma]] || 26 || $735 million || Tied with [[2002 Pacific hurricane season|2002]] and [[2018 Pacific hurricane season|2018]] for having the most category 5 hurricanes in a single season. <br> Includes the tropical cyclone that travelled the farthest distance on record, [[Hurricane John (1994)|Hurricane John]]. It was also the longest-lasting tropical cyclone ever observed until surpassed by [[Cyclone Freddy]] in 2023.
|-
| [[1995 Pacific hurricane season|1995]] || 11 || 10 || 7 || 3 || 100 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Juliette (1995)|Juliette]] || 124 || $31 million || Least active season since [[1979 Pacific hurricane season|1979]].
|-
| [[1996 Pacific hurricane season|1996]] || 14 || 9 || 5 || 2 || 53 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1996 Pacific hurricane season#Hurricane Douglas|Douglas]] || 48 || $813,000 || Tied with [[2021 Pacific hurricane season|2021]] for the most hurricanes to strike Mexico in a single season. <br> [[Hurricane Cesar–Douglas|Hurricane Cesar]] crossed over from Central America and was renamed Douglas in the Pacific basin.
|-
| [[1997 Pacific hurricane season|1997]] || 24 || 19 || 9 || 7 || 167 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Linda (1997)|Linda]] || 261–531 || $551 million || Hurricane Linda was the most intense hurricane in the Pacific basin until [[Hurricane Patricia|Patricia]] in [[2015 Pacific hurricane season|2015]].
|-
| [[1998 Pacific hurricane season|1998]] || 16 || 13 || 9 || 6 || 134 || ((color box|((storm color|4))|'''4'''|border=silver)) [[1998 Pacific hurricane season#Hurricane Howard|Howard]] || 54 || $760 million || 
|-
| [[1999 Pacific hurricane season|1999]] || 14 || 9 || 6 || 2 || 90 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Dora (1999)|Dora]] || 16 || None || 
|- class="sortbottom"
! Total !!  193 !! 157 !! 99 !! 55 !! 1,648 !! Linda !! 581–853 !! ≥$4.9 billion !!
|-
|}

===2000s===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! [[Accumulated cyclone energy|ACE]] !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[2000 Pacific hurricane season|2000]] || 21 || 19 || 6 || 2 || 95 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Carlotta (2000)|Carlotta]] || 27 || ((ntsp|84000000||$)) || 
|-
| [[2001 Pacific hurricane season|2001]] || 19 || 15 || 8 || 2 || 90 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Juliette (2001)|Juliette]] || 13 || ((ntsp|401000000||$)) ||
|-
| [[2002 Pacific hurricane season|2002]] || 19 || 15 || 8 || 6 || 124 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Kenna|Kenna]] || 7 || ((ntsp|101000000||$)) || Tied with [[1994 Pacific hurricane season|1994]] and [[2018 Pacific hurricane season|2018]] for having the most category 5 hurricanes in a single season. <br> Includes the fourth most intense hurricane in the Pacific basin, Kenna.
|-
| [[2003 Pacific hurricane season|2003]] || 17 || 16 || 7 || 0 || 56 || ((color box|((storm color|2))|'''2'''|border=silver)) [[Hurricane Nora (2003)|Nora]] || 23 || ((ntsp|129000000||$)) || Featured no major hurricanes, tied with [[1977 Pacific hurricane season|1977]].
|-
| [[2004 Pacific hurricane season|2004]] || 18 || 12 || 6 || 3 || 71 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Javier (2004)|Javier]] || None || None ||
|-
| [[2005 Pacific hurricane season|2005]] || 17 || 15 || 7 || 2 || 96 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Kenneth (2005)|Kenneth]] || 6 || ((ntsp|12000000||$)) || 
|-
| [[2006 Pacific hurricane season|2006]] || 25 || 19 || 11 || 6 || 155 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Ioke|Ioke]] || 14 || ((ntsp|355100000||$)) || Most active since [[2000 Pacific hurricane season|2000]]. <br> Includes the most intense hurricane in the Central Pacific basin, Ioke.
|-
| [[2007 Pacific hurricane season|2007]] || 15 || 11 || 4 || 1 || 52 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Flossie (2007)|Flossie]] || 42 || ((ntsp|80000000||$)) || 
|-
| [[2008 Pacific hurricane season|2008]] || 19 || 17 || 7 || 2 || 83 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Norbert (2008)|Norbert]] || 45 || ((ntsp|152500000||$)) ||
|-
| [[2009 Pacific hurricane season|2009]] || 23 || 20 || 8 || 5 || 127 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Rick (2009)|Rick]] || 16 || ((ntsp|225831000||$)) || Most active since [[1994 Pacific hurricane season|1994]]. <br> Tied with [[1968 Pacific hurricane season|1968]] for having the most storms named in the month of August. <br> Includes the third most intense hurricane in the Pacific basin, Rick.
|- class="sortbottom"
! Total
! ((#expr:21+19+19+17+17+17+25+15+19+23))
! ((#expr:19+15+15+16+12+15+19+11+17+20))
! ((#expr:6+8+8+7+6+7+11+4+7+8))
! ((#expr:2+2+6+0+3+2+6+1+2+5))
! ((#expr:95+90+124+56+71+96+155+52+83+127))
! [[Hurricane Rick (2009)|Rick]]
! ((#expr:27+13+7+23+0+6+14+42+45+16))
! ≥((ntsp|1540431000||$))
!
|-
|}

===2010s===
{| class="wikitable sortable"
|-
!  Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! [[Accumulated cyclone energy|ACE]] !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[2010 Pacific hurricane season|2010]] || 13 || 8 || 3 || 2 || 52 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Celia (2010)|Celia]] || 268 || $1.62 billion || Least active Pacific hurricane season on record, tied with [[1977 Pacific hurricane season|1977]].<br/>Includes a [[List of Category 5 Pacific hurricanes|Category 5 hurricane]] in the basin, Celia.<br/>Includes a rare-off season in the month of December, [[Tropical Storm Omeka|Omeka]].
|-
| [[2011 Pacific hurricane season|2011]] || 13 || 11 || 10 || 6 || 121 || ((color box|((storm color|4))|'''4'''|border=silver)) [[Hurricane Dora (2011)|Dora]] || 43 || >$203.67 million ||
|-
| [[2012 Pacific hurricane season|2012]] || 17 || 17 || 10 || 5 || 98 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2012 Pacific hurricane season#Hurricane Emilia|Emilia]] || 8 || $27.9 million ||
|-
| [[2013 Pacific hurricane season|2013]] || 21 || 20 || 9 || 1 || 76 || ((color box|((storm color|3))|'''3'''|border=silver)) [[Hurricane Raymond (2013)|Raymond]] || 194 || $4.56 billion ||
|-
| [[2014 Pacific hurricane season|2014]] || 23 || 22 || 16 || 9 || 199 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Marie (2014)|Marie]] || 49 || >$1.52 billion || Fourth most active season on record. <br> Tied with [[1990 Pacific hurricane season|1990]], [[1992 Pacific hurricane season|1992]], and [[2015 Pacific hurricane season|2015]] for the most hurricanes in a single season.
|-
| [[2015 Pacific hurricane season|2015]] || 31 || 26 || 16 || 11 || 287 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Patricia|Patricia]] || 45 || $566 million || Second most active season on record. <br> Includes the most intense hurricane in the Pacific basin, Patricia. <br> Tied with [[1990 Pacific hurricane season|1990]], [[1992 Pacific hurricane season|1992]], and [[2014 Pacific hurricane season|2014]] for the most hurricanes in a single season.<br> Tied with [[1985 Pacific hurricane season|1985]] and [[2016 Pacific hurricane season|2016]] for the most active month of July since reliable records began. <br> Latest ending to a season on record.
|-
| [[2016 Pacific hurricane season|2016]] || 23 || 22 || 13 || 6 || 183 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2016 Pacific hurricane season#Hurricane Seymour|Seymour]] || 11 || $95.8 million || Earliest start on record in the Pacific basin. <br> Fourth most active season on record. <br> Tied with [[1985 Pacific hurricane season|1985]] and [[2015 Pacific hurricane season|2015]] for the most active month of July since reliable records began. <br> [[2016 Pacific hurricane season#Tropical Storm Agatha|Agatha]] was the latest forming first-named storm on record in the Eastern Pacific since reliable records began.
|-
| [[2017 Pacific hurricane season|2017]] || 20 || 18 || 9 || 4 || 100 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2017 Pacific hurricane season#Hurricane Fernanda|Fernanda]] || 45 || $375.28 million  ||
|-
|  [[2018 Pacific hurricane season|2018]] || 26 || 23 || 13 || 10 || 318 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Walaka|Walaka]] || 56 || >$1.46 billion || Fourth-most active season on record.<br />Most active Pacific hurricane season on record in terms of ACE.<br> Tied with [[1985 Pacific hurricane season|1985]] for the most named storms on record in the month of June (5).<br>Tied with [[1994 Pacific hurricane season|1994]] and [[2002 Pacific hurricane season|2002]] for having the most Category 5 hurricanes in a single season.
|-
| [[2019 Pacific hurricane season|2019]] || 21 || 19 || 7 || 4 || 97 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2019 Pacific hurricane season#Hurricane Barbara|Barbara]] || 7 || $16.1 million || Third-latest first named storm since reliable records began in 1971.<br/>No hurricanes formed in August for the first time since [[1973 Pacific hurricane season|1973]]. 
|- class="sortbottom"
! Total 
! ((#expr:13+13+17+21+23+31+23+20+26+21))
! ((#expr:8+11+17+20+22+26+22+18+23+19))
! ((#expr:3+10+10+9+16+16+13+9+13+7))
! ((#expr:2+6+5+1+9+11+6+4+10+4))
! ((#expr:52+121+98+76+199+287+183+100+318+97))
! [[Hurricane Patricia|Patricia]]
! ((#expr:268+43+8+194+49+45+11+46+52+7))
! ≥((ntsp|10241907000||$))
!
|-
|}

=== 2020s ===
{| class="wikitable sortable"
|-
! Year !! ((abbr|TD|Tropical depressions)) !! ((abbr|TS|Tropical storms)) !! ((abbr|HU|Hurricanes)) !! ((abbr|MH|Major hurricanes)) !! [[Accumulated cyclone energy|ACE]] !! Strongest<br>storm !! Deaths !! Damages<br>(USD) !! Notes
|-
| [[2020 Pacific hurricane season|2020]]|| 21 || 17 || 4 || 3 || 77.3 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2020 Pacific hurricane season#Hurricane Marie|Marie]] || 47 || >$276.91 million || Least active season since [[2011 Pacific hurricane season|2011]].<br/>First season in which no tropical cyclones formed in the Central Pacific basin.<br/>Featured one unnamed tropical storm which was operationally classified as a tropical depression.
|-
| [[2021 Pacific hurricane season|2021]]|| 19 || 19 || 8 || 2 || 94 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2021 Pacific hurricane season#Hurricane Felicia|Felicia]] || 13 || >$255 million ||Earliest start to a season east of 140°E on record, second earliest fifth named storm on record.<br/>Second consecutive season in which no tropical cyclones formed in the Central Pacific basin.<br/>Five systems made landfall in Mexico.
|-
| [[2022 Pacific hurricane season|2022]]|| 19 || 19 || 10 || 4 || 116.5 || ((color box|((storm color|4))|'''4'''|border=silver)) [[2022 Pacific hurricane season#Hurricane Darby|Darby]] || 33 || >$123.3 million ||  Featured two tropical cyclones that crossed over from the Atlantic ([[Hurricane Bonnie (2022)|Bonnie]] and [[Hurricane Julia (2022)|Julia]]).<br/>Third consecutive season in which no tropical cyclones formed in the Central Pacific basin.<br/>Second season in a row to have at least five systems make landfall.
|- 
| [[2023 Pacific hurricane season|2023]]|| 20 || 17 || 10 || 8 || 163.2 || ((color box|((storm color|5))|'''5'''|border=silver)) [[Hurricane Otis (2023)|Otis]] || >61 || >$16.689 billion || Costliest Pacific hurricane season on record.<br/>[[2023 Pacific hurricane season#Hurricane Adrian|Adrian]] was the second-latest forming first-named storm on record in the Eastern Pacific since reliable records began.<br/>Featured [[Hurricane Hilary|Hilary]], the first tropical storm to enter California since [[Hurricane Nora (1997)|Nora]] in 1997.<br/>Featured Hurricanes [[Hurricane Jova (2023)|Jova]] and [[Hurricane Otis|Otis]], two of the fastest intensifying Pacific hurricanes on record.<br/>Otis was also the first Pacific hurricane to make landfall at Category 5 intensity.<br/>Tied with [[1992 Pacific hurricane season|1992]] for the most named storms in October.<br/>Fourth consecutive season in which no tropical cyclones formed in the Central Pacific basin.
|-
| [[2024 Pacific hurricane season|2024]] || 0 || 0 || 0 || 0 || 0 || || None || None ||
|- class="sortbottom" 
! Total 
! ((#expr:21+19+19+20+0)) 
! ((#expr:17+19+19+17+0)) 
! ((#expr:4+8+10+10+0))
! ((#expr:3+2+4+8+0))
! ((#expr:77.3+94+116.5+163.2+0))
! [[Hurricane Otis (2023)|Otis]]
! ((#expr:47+13+33+61+0))
! ≥((ntsp|17344910000||$)) <!-- 17,344.91 -->
!
|-
|}

==History==
[[File:Pacific hurricane tracks 1980-2005.jpg|thumb|Tracks of East Pacific tropical cyclones ((nowrap|(1980–2005)))]]
Documentation of Pacific hurricanes dates to the [[New Spain|Spanish colonization of Mexico]], when the military and [[mission (Christianity)|mission]]s wrote about "tempestades". In 1730, such accounts indicated an understanding of the storms. After observing the rotating nature of tropical cyclones, meteorologist [[William Charles Redfield]] expanded his study to include storms in the eastern North Pacific Ocean in the middle of the 19th century. Between June and October 1850, Redfield observed five tropical cyclones along "the southwestern coast of North America", along with one in each of the three subsequent years. In 1895, [[Cleveland Abbe]] reported the presence of many storms between 5° and 15°&ndash;[[Latitude|N]] in the eastern Pacific, although many such storms dissipated before affecting the Mexican coast. Two years later, the German Hydrography Office ''Deutsche Seewarte'' documented 45&nbsp;storms from 1832 to 1892 off the west coast of Mexico.<ref name="calif"/>

Despite the documentation of storms in the region, the official position of the [[National Weather Service|United States Weather Bureau]] denied the existence of such storms. In 1910, the agency reported on global tropical cyclones, noting that "the occurrence of tropical storms is confined to the summer and autumn months of the respective hemispheres and to the western parts of the several oceans." In 1913, the Weather Bureau reinforced their position by excluding Pacific storms among five [[tropical cyclone basins]]; however, the agency acknowledged the existence of "certain cyclones that have been traced for a relatively short distance along a northwest course... west of Central America."<ref name="calif">((cite book|author=Arnold Court|publisher=California State University|location=Northridge, California|year=1980|title=Tropical Cyclone Effects on California|series=NOAA technical memorandum NWS WR ;159|pages=2, 4, 6, 8, 34|access-date=February 2, 2012|url=http://babel.hathitrust.org/cgi/pt?id=uc1.31822009671892;seq=10;size=125;view=image))</ref>

After [[California]] became a state and the discovery of gold there in 1848, shipping traffic began increasing steadily in the eastern Pacific. Such activity increased further after the [[Panama Canal]] opened in 1914, and the shipping lanes moved closer to the coast. By around 1920, Pacific hurricanes were officially recognized due to widespread ship observations, radio service, and a newly created weather network in western Mexico. Within 60&nbsp;years, further studies of the region's tropical activity indicated that the eastern Pacific is in fact the second most active basin in the world.<ref name="calif"/>

During the 1920s, a few documents in the [[Monthly Weather Review]] reported additional storms within ((convert|2,000|mi|km|abbr=on)) off the Mexican coastline.<ref name=Tingley>((cite journal|year=1922|page=99|title=North Pacific Ocean|author=Tingley, F. G.|access-date=December 20, 2010|issue=3|journal=Monthly Weather Review|volume=50|publisher=American Meteorological Society|url=http://docs.lib.noaa.gov/rescue/mwr/050/mwr-050-02-0098.pdf|doi=10.1175/1520-0493(1929)57<121:NPO>2.0.CO;2|issn=1520-0493|bibcode = 1929MWRv...57..121H |doi-access=free))</ref><ref name="ENPTC">((cite journal|title=Eastern North Pacific tropical cyclones|date=April 21, 1929|volume=57|url=http://docs.lib.noaa.gov/rescue/mwr/057/mwr-057-02-0043.pdf|access-date=December 21, 2010|author=Hurd, Willis Edwin|journal=Monthly Weather Review|issue=2 |page=98|publisher=American Meteorological Society|doi=10.1175/1520-0493(1922)50<98:NPO>2.0.CO;2|bibcode = 1922MWRv...50...98T |doi-access=free))</ref>

==The Eastern and Central Pacific hurricane database==
The Eastern Pacific hurricane best track database was initially compiled on [[magnetic tape]] in 1976 for the seasons between 1949 and 1975, at the NHC to help with the development of two [[tropical cyclone forecast model]]s, which required tracks of past cyclones as a base for its predictions.<ref name="Stat">((cite report|access-date=July 27, 2013 |url=http://docs.lib.noaa.gov/noaa_documents/NWS/NWS_WR/TM_NWS_WR_124.PDF |publisher=United States National Oceanic and Atmospheric Administration's National Weather Service&nbsp;— Western Region |title=Statistical Guidance for the Prediction of Eastern North Pacific Tropical Cyclone Motion&nbsp;— Part I |author=Neumann, Charles J |author2=Leftwhich, Preston W |type=NOAA Technical Memorandum NWS WR-124 |archive-url=https://web.archive.org/web/20130301184246/http://www.nhc.noaa.gov/pdf/NWS-NHC-1982-16.pdf |archive-date=March 1, 2013 |date=August 1977 |url-status=live |page=14 ))</ref><ref name="Comp">((cite report|access-date=July 27, 2013 |url=http://www.nhc.noaa.gov/pdf/NWS-NHC-1982-16.pdf |publisher=United States National Oceanic and Atmospheric Administration's National Weather Service |title=A Compilation of Eastern and Central North Pacific Tropical Cyclone Data |author=Brown, Gail M |author2=Leftwhich, Preston W |author3=National Hurricane Center |type=NOAA Technical Memorandum NWS NHC 16 |archive-url=https://web.archive.org/web/20130301184246/http://www.nhc.noaa.gov/pdf/NWS-NHC-1982-16.pdf |archive-date=March 1, 2013 |date=August 1982 |url-status=live ))</ref> The database was based on records held by the United States Navy and were interpolated from 12 hourly intervals to 6 hourly intervals based on a scheme devised by Hiroshi Akima in 1970.((Tropical Cyclones of the Eastern North Pacific Basin, 1949-2006))<ref name="Intra Seasonal">((cite report|access-date=July 27, 2013 |url=http://docs.lib.noaa.gov/noaa_documents/NWS/NWS_WR/TM_NWS_WR_160.pdf |publisher=United States National Oceanic and Atmospheric Administration's National Weather Service&nbsp;— Western Region |title=Eastern North Pacific Tropical Cyclone Occurrences during Intra Seasonal Periods |type=NOAA Technical Memorandum NWS WR-160 |author2=Brown, Gail M |archive-url=https://web.archive.org/web/20150218235654/http://docs.lib.noaa.gov/noaa_documents/NWS/NWS_WR/TM_NWS_WR_160.pdf |archive-date=February 18, 2015 |author=Leftwhich, Preston W |date=February 1981 |url-status=live |pages=2–3 ))</ref> Initially tracks for the Central Pacific region and tracks for tropical depressions that did not develop into tropical storms or hurricanes were not included within the database.<ref name="Intra Seasonal"/> After the database had been created Arthur Pike of the NHC made some internal adjustments, while in 1980 a review was made by Arnold Court under contract from the [[United States National Weather Service]] and resulted in additions and/or modifications to 81 tracks in the database.<ref name="EPAC Book"/><ref name="1949-1983">((cite report|access-date=July 28, 2013 |url=http://www.nhc.noaa.gov/pdf/NWS-NHC-1984-25.pdf |publisher=United States National Oceanic and Atmospheric Administration's National Weather Service |title=A Tropical Cyclone Data Tape for the Eastern and Central North Pacific Basins, 1949-1983: Contents, Limitations, and Uses |type=NOAA Technical Memorandum NWS NHC 25 |author2=Brown, Gail M |archive-url=https://web.archive.org/web/20130219021154/http://www.nhc.noaa.gov/pdf/NWS-NHC-1984-25.pdf |archive-date=February 19, 2013 |date=September 1984 |author3=Leftwhich, Preston W |url-status=live |pages=2–3 |author=Davis, Mary A.S. |author4=National Hurricane Center ))</ref> Between 1976 and 1987, the NHC archived best track data from the [[Eastern Pacific Hurricane Center]] <small>(EPHC)</small>, and in 1982 started including information on Central Pacific tropical storms and hurricanes started to be included in the database based on data from the [[Joint Typhoon Warning Center]] and research done by Samuel Shaw of the [[Central Pacific Hurricane Center]] <small>(CPHC)</small> in 1981.<ref name="Stat"/><ref name="EPAC Book"/>

The format of the database was completely revised by the NHC during 1984, so that the format could resemble the Atlantic database before they took over the warning responsibility from the EPHC for the Eastern Pacific during 1988.<ref name="EPAC Book"/><ref name="1949-1983"/><ref>((cite journal|title=The National Hurricane Center&nbsp;— Past, Present, and Future|date=June 1990|url=http://www.nhc.noaa.gov/pdf/NHC_Past_Present_Future_1990.pdf|volume=5|issue=2|page=197|issn=1520-0434|doi=10.1175/1520-0434(1990)005<0185:TNHCPA>2.0.CO;2|journal=Weather and Forecasting|author=Sheets, Robert C|bibcode = 1990WtFor...5..185S ))</ref> During 2008 and 2013 several revisions were made to the database to extend tracks in land, based on reports in the [[Mariners Weather Log]] and extrapolation of the tracks since the EPHC stopped issuing advisories on systems before they made landfall.<ref name="EPAC Metadata">((cite report|access-date=March 6, 2015|url=http://www.aoml.noaa.gov/hrd/hurdat/tracks-hurdat2-epac-metadata-apr13.html|publisher=United States National Oceanic and Atmospheric Administration's National Weather Service|title=Revisions made to EPAC HURDAT|date=April 2015|author=National Hurricane Center))</ref> The archives format was significantly changed during 2013 to include non-synoptic best track times, non-developing tropical depressions and wind radii.<ref name="HURDAT2">((cite report|access-date=July 28, 2013 |url=http://www.nhc.noaa.gov/data/hurdat/hurdat2-format-nencpac.pdf |publisher=United States National Oceanic and Atmospheric Administration's National Weather Service |title=The revised Northeast and North Central Pacific hurricane database (HURDAT2) |author=Landsea, Christopher W |author2=Franklin, James L |author3=Blake, Eric S |author4=Tanabe Raymond |archive-url=https://web.archive.org/web/20130828162814/http://www.nhc.noaa.gov/data/hurdat/hurdat2-format-nencpac.pdf |archive-date=August 28, 2013 |date=April 2013 |url-status=live |pages=1 ))</ref> During February 2016, the NHC released the [[1959 Mexico hurricane]]'s reanalysis, which was the first system to be reassessed, using methods developed for the Atlantic reanalysis process.<ref>((cite press release|access-date=February 4, 2016 |url=http://www.nhc.noaa.gov/news/20160204_pa_1959HurricaneReanalysis.pdf |title=Re-analysis of the 1959 Manzanillo Mexico Hurricane Landfall intensity changed from category 5 to category 4 |date=February 4, 2016 |url-status=live |archive-url=https://web.archive.org/web/20160205005228/http://www.nhc.noaa.gov/news/20160204_pa_1959HurricaneReanalysis.pdf |publisher=United States National Hurricane Center |archive-date=February 5, 2016 ))</ref>

==Climatology==
The presence of a semi-permanent [[high-pressure area]] known as the [[North Pacific High]] in the eastern Pacific is a dominant factor against the formation of tropical cyclones in the winter, as the Pacific High results in [[wind shear]] that causes unfavorable, environmental conditions for tropical cyclone formation. Its effects in the central Pacific basin are usually related to keeping cyclones away from the Hawaiian Islands. Due to westward [[trade wind]]s, hurricanes in the Pacific rarely head eastward, unless recurved by a trough. A second factor preventing tropical cyclones from forming during the winter is the occupation of a semi-permanent [[low-pressure area]] designated the [[Aleutian Low]] between January and April. Its presence over western Canada and the northwestern United States contributes to the area's occurrences of precipitation in that duration. In addition, its effects in the central Pacific near 160°&nbsp;W causes tropical waves that form in the area to drift northward into the [[Gulf of Alaska]] and dissipate. The retreat of this low allows the Pacific High to also retreat into the central Pacific, leaving a warm and moist environment in its wake. The [[Intertropical Convergence Zone]] comes northward into the East Pacific in mid-May permitting the formation of the earliest [[tropical wave]]s,<ref name="Longshore2009">((cite book|last=Longshore|first=David|title=Encyclopedia of Hurricanes, Typhoons, and Cyclones, New Edition|url=https://books.google.com/books?id=8kXwskQHBLoC&pg=PA115|year=2009|publisher=Infobase Publishing|isbn=978-1-4381-1879-6|page=333))</ref> coinciding with the start of the eastern Pacific hurricane season on May&nbsp;15.<ref name="season">((cite web|url=http://www.aoml.noaa.gov/hrd/tcfaq/G1.html|title=TCFAQ G1) When is hurricane season?|author=Dorst, Neal|date=January 21, 2010|publisher=Atlantic Oceanographic and Meteorological Laboratory|work=Hurricane Research Division|access-date=November 30, 2011|location=United States))</ref>

The [[El Niño–Southern Oscillation]] also influences the frequency and intensity of hurricanes in the Northeast Pacific basin. During [[El Niño]] events, [[sea surface temperature]]s increase in the Northeast Pacific and vertical wind shear decreases. Because of this, an increase in tropical cyclone activity occurs; the opposite happens in the [[Tropical cyclone basins#Northern Atlantic Ocean|Atlantic basin]] during El Niño, where increased wind shear creates an unfavorable environment for tropical cyclone formation.<ref>((cite web|url=http://earthobservatory.nasa.gov/Features/Hurricanes/hurricanes_3.php|title=Hurricanes: The Greatest Storms on Earth: Feature Articles|first1=Steve|last1=Graham|first2=Holli|last2=Riebeek|date=November 1, 2006|work=[[NASA Earth Observatory|Earth Observatory]]|publisher=[[NASA|National Aeronautics and Space Administration]]|access-date=July 24, 2018|location=United States|archive-url=https://web.archive.org/web/20170506091751/https://earthobservatory.nasa.gov/Features/Hurricanes/hurricanes_3.php|archive-date=May 6, 2017|url-status=live))</ref> Contrary to El Niño, [[La Niña]] events increase wind shear and decreases sea surface temperatures over the eastern Pacific, while reducing wind shear and increasing sea surface temperatures over the Atlantic.<ref name="Longshore2009"/>

==Eastern North Pacific==
((More citations needed section|date=September 2012))
[[File:Hist east pac ace trend 1971-2007.gif|thumb|Historical East Pacific Seasonal Activity, 1971–2007. Data on ACE is considered reliable starting with the 1971 season]]
Hurricane season runs between May 15 and November 30 each year.<ref name="CPHC climatology">((cite web|url=http://www.prh.noaa.gov/cphc/pages/FAQ/Climatology.php|title=Tropical Cyclone Climatology|publisher=[[Central Pacific Hurricane Center]]|work=FAQ|access-date=December 31, 2007))</ref> These dates encompass the vast majority of tropical cyclone activity in this region.

The [[Regional Specialized Meteorological Center]] for this basin is the [[United States]]' [[National Hurricane Center]].<ref>((cite web | url=https://www.wmo.int/pages/prog/www/tcp/Advisories-RSMCs.html | title=Latest Advisories on Current Tropical Cyclones Hurricanes Typhoons | publisher=World Meteorological Organization | access-date=April 1, 2015))</ref> Previous forecasters are the [[Eastern Pacific Hurricane Center]] and the [[Joint Hurricane Warning Center]]. The RSMC monitors the eastern Pacific and issues reports, watches and warnings about tropical weather systems and cyclones as defined by the [[World Meteorological Organization]].

This area is, on average, the second-most active basin in the world. There are an average of 16 tropical storms annually, with 9 becoming hurricanes, and 4 becoming major hurricanes.<ref>[[National Hurricane Center]]. [http://www.nhc.noaa.gov/pastprofile.shtml? Tropical Cyclone Climatology.] ((Webarchive|url=https://web.archive.org/web/20071213074803/http://www.nhc.noaa.gov/pastprofile.shtml |date=December 13, 2007 )) Retrieved on April 19, 2008.</ref>  Tropical cyclones in this region frequently affect mainland [[Mexico]] and the [[Revillagigedo Islands]].  Less often, a system will affect the [[Continental United States]] or [[Central America]]. Northbound hurricanes typically reduce to tropical storms or dissipate before reaching the United States: there is only one recorded case of a Pacific system reaching [[California]] as a hurricane in almost 200&nbsp;years of observations&mdash;the [[1858 San Diego Hurricane]].<ref name="aoml">Michael Chenoweth and [[Chris Landsea]]. [http://www.aoml.noaa.gov/hrd/Landsea/chenowethlandsea.pdf The San Diego Hurricane of 2 October 1858.] Retrieved on April 19, 2008.</ref>

Most east Pacific hurricanes originate from a tropical wave that drifts westward across the intertropical convergence zone,  and across northern parts of South America. Once it reaches the Pacific, a surface low begins to develop, however, with only little or no convection. After reaching the Pacific, it starts to move north-westward and eventually west. By that time, it develops convection and thunderstorm activity from the warm ocean temperatures but remains disorganized. Once the tropical wave becomes organized, it becomes a tropical depression. Formation usually occurs from south of the Gulf of Tehuantepec to south of Baja California with a more westerly location earlier in the season. In the eastern Pacific, development is more centered than anywhere else. If wind shear is low, a tropical cyclone can undergo [[rapid intensification]] as a result of very warm oceans, becoming a major hurricane. Tropical cyclones weaken once they reach unfavorable areas for a tropical cyclone formation. Their remnants sometimes reach Hawaii and cause showers there.

There are a few types of Pacific hurricane tracks: one is a westerly track, another moves north-westward along Baja California and another moves north. Sometimes storms can move north-east either across Central America or mainland Mexico and possibly enter the Caribbean Sea becoming a [[North Atlantic hurricane]], but these are rare.

==Central Pacific==
Hurricane season runs from June 1 to November 30, with a strong peak in August and September. However, tropical cyclones have formed outside those dates.<ref name="CPHC climatology"/> The [[Central Pacific Hurricane Center]] is the RSMC for this basin and monitors the storms that develop or move into the defined area of responsibility. A previous forecaster was the [[Joint Hurricane Warning Center]].

It is rare that tropical cyclones form in the Central Pacific, though on average 3 or 4 storms move into this area per year, primarily from the Eastern Pacific, but also on rare occasions from across the International Dateline in the Western Pacific. Most often, storms that occur in the area are weak and often decline in strength upon entry. The only land masses impacted by tropical cyclones in this region are [[Hawaii]] and [[Johnston Atoll]]. Due to the small size of the islands in relation to the Pacific Ocean, direct hits and landfalls are rare.

==Steering factors==
((See also|Tropical cyclone track forecasting|Subtropical ridge))
Hurricanes in the Eastern Pacific tend to move westward out to sea, harming no land—unless they cross into the Central Pacific or Western Pacific basins, in which case they might harm land such as Hawaii or Japan. However, hurricanes can recurve to the north or northeast, hitting Central America or Mexico early and late in the hurricane season.

==Extremes==
((Main|List of Pacific hurricane records))
*The strongest recorded Pacific hurricane was [[Hurricane Patricia]] (2015), with 1-minute [[maximum sustained winds]] of 215&nbsp;mph (345&nbsp;km/h) and a minimum [[barometric pressure]] of 872&nbsp;mbar (hPa; 25.75&nbsp;inHg). This ranks Patricia as the strongest tropical cyclone globally in terms of 1-minute sustained winds and the second strongest globally in terms of barometric pressure.<ref>((cite report|author1=Todd B. Kimberlain |author2=Eric S. Blake |author3=John P. Cangialosi  |name-list-style=amp |publisher=[[National Hurricane Center]]|date=February 1, 2016|access-date=February 4, 2016|title=Hurricane Patricia|series=Tropical Cyclone Report|url=((NHC TCR url|id=EP202015_Patricia))|format=PDF|location=Miami, Florida))</ref>
*[[Hurricane John (1994)]] was the farthest-travelling tropical cyclone worldwide, traversing 7,165&nbsp;mi (13,280&nbsp;km) in 30&nbsp;days and 18&nbsp;hours.<ref>((cite web|url=http://www.prh.noaa.gov/cphc/pages/FAQ/Tropical_Cyclone_Records.php|title=Tropical Cyclone Records|publisher=[[National Hurricane Center]] & [[Central Pacific Hurricane Center]]|access-date=November 30, 2019|work=FAQ|archive-url=https://web.archive.org/web/20190104215551/http://www.prh.noaa.gov/cphc/pages/FAQ/Tropical_Cyclone_Records.php|archive-date=January 4, 2019|url-status=dead))</ref>
*The [[1959 Mexico hurricane]] was the deadliest Pacific hurricane, causing 1,800 fatalities mostly in [[Colima]] and [[Jalisco]].<ref>((cite web|url=http://www.ejournal.unam.mx/atmosfera/Vol16-4/ATM16401.pdf |author=E. Jáuregui |title=Climatology of landfalling hurricanes and tropical storms in Mexico |year=2003 |work=Atmósfera |pages=200 |access-date=December 28, 2007 |archive-url=https://web.archive.org/web/20071201101508/http://www.ejournal.unam.mx/atmosfera/Vol16-4/ATM16401.pdf |archive-date=December 1, 2007 |url-status=dead ))</ref>

==See also==
((portal|Tropical cyclones))
((div col))
* [[Atlantic hurricane]]
* [[Cordonazo wind]]
* [[Tropical cyclone]]
* [[Typhoon]]
* [[Atlantic hurricane season]]
* [[Pacific typhoon climatology]]
* [[Pacific typhoon season]]
* [[North Indian Ocean tropical cyclone season]]
* [[South-West Indian Ocean tropical cyclone season]]
* [[Australian region tropical cyclone season]]
* [[South Pacific tropical cyclone season]]
* [[South Atlantic tropical cyclone]]
* [[Mediterranean tropical-like cyclone]]
* [[List of tropical cyclone records]]
((div col end))

==References==
((Reflist))
((Cyclones))

((DEFAULTSORT:Pacific Hurricane))
[[Category:Pacific hurricanes| Pacific]]
[[Category:Tropical cyclone meteorology|*]]

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