Storms Note: indicates the name was retired after that usage in the respective basin.
Obet 2022 – tropical depression that minimally affected the Philippines and Taiwan. 2026 – a Category 4 typhoon that made landfall in the China which was one of the longest-lived typhoons on record.
Octave 1983 – considered the worst tropical cyclone in the history of Arizona, whose remnants caused devastating and record-breaking flooding in the state. 1989 – a Category 4 hurricane whose remnants brought notable rainfall to Southern California. 2001 – a category 1 hurricane, never threatened land. 2013 – a powerful tropical storm that made landfall in Baja California in October 2013. 2019 – never threatened land. 2025 – a Category 1 hurricane that stayed out to sea.
Odalys 2020 – a late-season weak tropical storm that stayed at sea. 2026 – a Category 4 hurricane that did not threaten land.
Odessa 1964 – never threatened land. 1982 – never threatened land. 1985 – a category 2 typhoon that hit Japan. 1988 – never threatened land.
Odette 1971 – a rare off-season tropical storm in the South-West Indian Ocean. 1985 – formed off the coast of Queensland and moved across the Coral Sea. 2003 – an off-season storm that formed near the coast of Panama and made landfall in the Dominican Republic. 2007 – formed in the Coral Sea, causing heavy swell along the coast of Queensland. 2013 – a Category 4-equivalent super typhoon that affected parts of the Philippines, Taiwan, and China. 2017 – a category 2 typhoon that affected the northern part of the Philippines and later hit southern China. 2021 (April) – formed off the coast of Western Australia and was soon fully absorbed into the circulation of Cyclone Seroja. 2021 (September) – a weak short-lived storm that formed off the Mid-Atlantic U.S. coast and moved out to sea. 2021 (December) – a Category 5-equivalent super typhoon that caused severe and widespread damage in the Southern Philippines.
Odile 1984 – a Category 2 hurricane that made landfall northwest of Zihuatanejo and killed 21 people. 1990 – a powerful Category 4 hurricane that did not threaten land. 1994 – a powerful Category 3 tropical cyclone that did not threaten land. 2008 – a tropical storm that affected Central America and Mexico. 2014 – a devastating Category 4 hurricane that struck the Baja California Peninsula and also affected parts of Northwest Mexico and the Southwestern United States.
Ofa 1979 – a Category 2 tropical cyclone stayed at sea. 1990 – a powerful tropical cyclone that caused severe damage in Polynesia
Ofel 2004 – a weak tropical storm that hit eastern China. 2008 – the most intense tropical cyclone in the Northwest Pacific Ocean during the 2000. 2012 – a powerful, late-forming typhoon that devastated the Philippines with tropical storm strength, and battered Northern Vietnam with hurricane-force winds at landfall. 2020 – tropical depression that affected the Philippines and Vietnam. 2024 – a Category 4 super typhoon that struck the Philippines and Taiwan.
Ofelia 1990 – the first of two typhoons in 1990 to directly affect the Philippines within a week. 1993 – an early-season tropical cyclone that passed south Japan.
Ogden 1981 – a Category 1 typhoon that made landfall Japan and South Korea. 1984 – a Category 1 typhoon that had no effect on land. 1987 – a tropical depression that made landfall in the Vietnam.
Ogni (2006) – throughout Andhra Pradesh, Ogni killed 24 people, mostly on rice or shrimp farms damage totaled $47 million.
Oka (1987) – a tropical storm stayed at sea.
Olaf 1985 – never threatened land. 1997 – an erratic and long-lived tropical cyclone that brought heavy rainfall to regions of Mexico, which would be devastated by Hurricane Pauline a week later. 2003 – a minimal hurricane that made landfall in Mexico as a tropical storm. 2005 – a powerful Category 5 cyclone that caused severe damage in both Samoa and American Samoa. 2009 – approached Baja California. 2015 – a Category 4 major hurricane that moved into the Central Pacific and then back into the Eastern Pacific while still tropical. 2021 – a Category 2 Pacific hurricane that struck the Baja California Peninsula in September 2021.
Olga 1948 – a strong tropical storm that formed in the South China Sea. 1954 – a category 3 typhoon, never threatened land. 1958 – never threatened land. 1961 – Category 1 typhoon that hit southern China. 1964 – formed and remained in the Gulf of Tonkin. 1966 – a weak tropical storm that affected the Philippines. 1970 – a powerful tropical cyclone affected Japan. 1972 – struck the Marshall Islands and the Northern Marianas, causing minimal damage. 1976 – affected the Philippines and Japan. 1981 – a powerful tropical cyclone stayed at sea. 1999 – killed 106 people in North and South Korea and caused US$657 million in damages. 2000 – paralleled the Kimberley and Pilbara coasts. 2001 – large Category 1 hurricane that had no effect on land. 2007 – off-season storm that killed 40 people, mostly in the Dominican Republic. 2010 – crossed the lower Cape York Peninsula and then meandered in the southern Gulf of Carpentaria. 2019 – formed in the Gulf of Mexico, then caused severe damage as an extratropical system across the Central United States. 2024 – Category 5 severe tropical cyclone that dissipated off the coast of Western Australia.
Oli 1993 – a Category 1 tropical cyclone that made landfall in Fiji. 2010 – a Category 4 tropical cyclone that affected French Polynesia.
Olive 1947 – a Category 3 typhoon that had no effect on land. 1952 – a Category 5 typhoon that affected Wake Island. 1956 – a strong typhoon that struck the Philippines. 1960 – a powerful typhoon that struck the Philippines and China. 1963 – a Category 4 typhoon that had no effect on land. 1965 (March) – didn't affect land. 1965 (August) – a Category 5 typhoon that had no effect on land. 1968 – did not significantly impact land. 1971 – an erratic and slightly long-lived tropical cyclone that impacted Japan and affected Manchuria. 1974 – didn't affect land. 1978 – a powerful tropical cyclone which affected the Philippines and Taiwan.
Olivia 1967 – struck Baja California. 1971 – continuation of Atlantic Hurricane Irene; hit Mexico. 1975 – caused heavy damage in Mazatlán. 1978 – continuation of Hurricane Greta; struck Mexico. 1982 – brought rain to California. 1994 – never threatened land. 1996 – a powerful tropical cyclone that passing over Barrow Island off the Western Australian northwest coast, and caused major damage on the Pilbara coast, Pannawonica, and Mardie. 2000 – never threatened land. 2006 – never threatened land. 2012 – never threatened land. 2018 – made landfall in Hawaii as a tropical storm.
Olwyn (2015) –a powerful tropical cyclone that caused extensive damage across the northwestern coast of Western Australia in March 2015.
Oma 2001 – a Category 1 tropical cyclone that never threatened land. 2019 – a Category 3 severe tropical cyclone tha impacted Vanuatu, New Caledonia and the Solomon Islands.
Omais 2004 – a weak storm that formed in May of 2004. 2010 – recurved out to sea as a tropical storm. 2016 – recurved out to sea, later threatening Alaska as an extratropical cyclone 2021 – A long-lived tropical cyclone which affected South Korea and the Mariana Islands.
Omar 1992 – a category 4 super typhoon in the Pacific Ocean, struck Guam, Taiwan, and China, causing 2 deaths and about half a billion dollars in damage. The name was retired after the 1992 season, and was replaced with Oscar for the 1995 season. 2008 – a category 4 hurricane that grazed the Netherlands Antilles, Puerto Rico, and the Virgin Islands, doing minor to moderate damage and causing 1 indirect death. 2020 – minimal tropical storm that caused rip currents and swells in the Carolinas, earliest fifteenth named storm on record in the Atlantic.
Ompong 2006 – wind shear from Typhoon Soulik prevented any intensification. 2014 – the most intense tropical cyclone worldwide in 2014, and struck Japan as a large tropical system. It also indirectly affected the Philippines and Taiwan. 2018 – a very powerful and catastrophic tropical cyclone that caused extensive damage in Guam, the Philippines and South China in September 2018.
Ondoy 2001 – a weak storm that completed a loop to the east of Samar Island before moving further out to sea. 2005 – made landfall in the northern Philippines. 2009 – made landfall in the Philippines and causing massive flooding in Metro Manila and other nearby provinces.
Oniang 1963 – a Category 4 typhoon that impacted Taiwan and China causing 239 fatalities with 89 missing. 1967 – struck southern China. 1971 – made landfall on Vietnam. 1975 – had no significant effects on land. 1979 – struck Japan. 1983 – a Category 1 typhoon that did not significantly impact land. 1987 – a Category 2 typhoon that caused 9 deaths and $365.6 million (1987 USD) in damages when it made landfall on Japan. 1991 – a Category 3 typhoon that traveled in an erratic path before striking Taiwan and southern China. 1995 – made landfall on Vietnam and the Philippines. 1999 – a Category 5-equivalent super typhoon that struck Japan, causing 36 deaths and $5.75 billion (1999 USD) in damages.
Onil (2004) – was the first tropical cyclone to be named in the northern Indian Ocean.
Onyok 2003 – the strongest tropical cyclone to strike the Pearl River delta since Typhoon Hope in 1979. 2011 – a powerful and persistent tropical cyclone that affected Japan, including some areas that had been damaged by another typhoon just a few weeks prior. 2015 – a weak tropical cyclone that caused only minimal damages in the Philippines. 2019 – a moderately strong typhoon that severely affected Taiwan, East China and South Korea.
Opal 1945 – a Category 1 typhoon passed off the coast of Japan. 1946 – a Category 3 typhoon that struck the Philippines and South China. 1955 – a Category 2 typhoon that made landfall Japan as tropical storm. 1959 – a short-lived tropical storm, forming between northeast of Pohnpei and southwest of Ujelang Atoll. 1962 – a Category 5 super typhoon that struck Taiwan, China, Korea and Japan. 1964 – an intense Category 5-equivalent typhoon that made landfall Philippines. 1967 – a Category 5 super typhoon passed near Japan. 1970 – a weak tropical storm that minimal affected Philippines. 1973 – a Category 1 typhoon that made landfall South Vietnam. 1976 – never threatened land. 1995 – a Category 4 hurricane that caused severe and extensive damage along the northern Gulf Coast of the United States. 1997 – a Category 2 typhoon that made landfall Japan.
Openg 1965 – hit Taiwan as a Category 3-equivalent typhoon. 1969 – a typhoon which affected the Philippines, Taiwan and Japan, killing 75; considered by JTWC as merely a high-end tropical storm. 1973 – the final named storm of the 1973 season; affected the Philippines. 1977 – struck the Philippines before having an erratic track in the South China Sea, resulting to 54 lives lost. 1981 – made landfall in Japan, causing widespread damage amounting to $1.03 billion and killing 43 people. 1985 – hit Hainan and northern Vietnam at peak intensity, ultimately causing the deaths of 46 individuals. 1989 – a powerful typhoon which affected the Philippines, Taiwan and China, claiming 71 lives in total. 1993 – mid-season typhoon that impacted Japan and South Korea, resulting to 54 fatalities. 1997 – a strong tropical storm which later crossed into the North Indian Ocean after making landfalls in Vietnam and Thailand; considered as the most devastating typhoon to hit southern Vietnam, killing at least 3,111 people, in addition to 164 fatalities in Thailand.
Ophelia 1948 – a weak tropical storm struck southern China 1953 – a Category 3 typhoon hit Hong Kong and Vietnam.