The list of unnamed tropical cyclones since naming began includes all tropical cyclones that met the criteria for naming in a basin, but that for whatever reason, did not receive a name. These systems have occurred in all basins and for various reasons.

Scope, reasons, and naming overview

Naming has been used since the 1950 season. In order to ease communications and advisories, tropical cyclones are named when, according to the appropriate Regional Specialized Meteorological Center or Tropical Cyclone Warning Center, it has reached tropical storm status. A tropical cyclone with winds of tropical storm intensity or higher goes unnamed when operationally, it is not considered to have met the criteria for naming. Reasons for this include:

Being missed during a season, usually because of uncertainties in classification in real time. An example of this is the Azores subtropical storm from the 2005 Atlantic hurricane season. Disagreements between warning centre and naming centres over intensity of a cyclone. An example of this is Tropical Storm 06W from the 1995 Pacific typhoon season. Formation of a cyclone in an area where no official agency is responsible for naming. An example of this is Tropical Cyclone 29P from the 1996–97 South Pacific cyclone season. Intentionally left unnamed to avoid confusion. An example of this is the Perfect Storm from the 1991 Atlantic hurricane season. Post-operational upgrading. An example of this is Tropical Storm One-E from the 1996 Pacific hurricane season.

North Atlantic Ocean Only unnamed subtropical cyclones that could have been named are included. This excludes several that existed, but that were unnamed because subtropical cyclones were not named when they existed.

Storm Year Peak classification Twelve 1950 Fifteen 1950 Sixteen 1950 One 1951 Twelve 1951 "Groundhog Day" 1952 Three 1952 Five 1952 Eight 1952 Eleven 1952 Two 1953 Five 1953 Eight 1953 Eleven 1953 Thirteen 1953 One 1954 Two 1954 Four 1954 Nine 1954 Eleven 1954 Thirteen 1954 Fifteen 1954 Five 1955 Eleven 1955 Twelve 1955 One 1956 Two 1956 Nine 1956 Ten 1956 Twelve 1956 One 1957 Eight 1957 One 1958 Twelve 1958

Storm Year Peak classification "Escuminac" 1959 Six 1959 Eight 1959 Nine 1959 "Texas" 1960 Six 1960 Six 1961 Twelve 1961 One 1962 Ten 1962 One 1963 Four 1963 One 1964 Two 1964 Three 1964 Thirteen 1964 One 1965 Four 1965 Seven 1965 Nine 1965 Ten 1965 Two 1966 Fourteen 1966 Fifteen 1966 One 1967 Two 1967 Four 1967 Eight 1967 Twelve 1967 Five 1968 Ten 1969 Eleven 1969 Sixteen 1969 Seventeen 1969

Storm Year Peak classification Eight 1970 Ten 1970 Twenty-One 1970 "Caribbean–Azores" 1970 "Canada" 1970 Nineteen 1970 Twenty-Three 1970 Two 1971 "Gulf Coast" 1987 Unnamed 1988 "Perfect Storm" 1991 Unnamed 1997 Unnamed 2000 "Azores" 2005 Unnamed 2006 Unnamed 2011 Unnamed 2013 Unnamed 2023

South Atlantic Ocean The South Atlantic is not officially classified as a tropical cyclone basin by the World Meteorological Organization and does not have a designated regional specialized meteorological center (RSMC) that gives official names to tropical cyclones. Despite this, in 2011, the Hydrographic Center of the Brazilian Navy began giving unofficial names to tropical and subtropical cyclones in the south Atlantic. Prior to that, a few systems in the south Atlantic were given names.

There has been one system, Tropical Storm 01Q in 2021, that was monitored and designated 01Q by the National Oceanic and Atmospheric Administration (NOAA). However, the Brazilian Navy did not recognize the system as a tropical cyclone and it remains unnamed.

Eastern and Central North Pacific Ocean

Naming began in 1960. Before 1960, a few systems in the central Pacific basin were given names, generally in an ad hoc manner.

Storm Year Peak classification Four 1962 Hurricane "C" 1962 Tropical Storm "R" 1962 Tropical Storm "T" 1962 Tropical Storm "X" 1962 Tropical Storm "Z" 1962 Tropical Storm "A" 1962 Seven 1962 Four 1963 "Pacific Northwest" 1975 Unnamed 1996 Unnamed 2020 Unnamed 2024

Western North Pacific Ocean

The official practice of tropical cyclone naming started in 1945 within the western north Pacific. Due to differences in wind speed criteria between the Japan Meteorological Agency and the Joint Typhoon Warning Center, a system will sometimes be considered a tropical storm by the JTWC but only a depression by the JMA, or vice versa. This results in several apparent unnamed systems. Prior to 2000, the JTWC was responsible for tropical cyclone naming, with the JMA assuming responsibility for naming from 2000 and beyond. Due to this, unnamed cyclones that met the JMA's tropical storm criteria but not those of the JTWC prior to 2000 are excluded. Likewise, systems that met the JTWC's tropical storm criteria but not those of the JMA from 2000 to present are also excluded.

Storm Year Peak classification Tropical Storm 24W 1948 Tropical Storm 26W 1948 Tropical Storm 02W 1950 Tropical Storm 12W 1952 Tropical Storm 14W 1952 Tropical Storm 04W 1953 Tropical Storm 09W 1953 Tropical Storm 13W 1953 Tropical Storm 16W 1953 Tropical Storm 22W 1953 Tropical Storm 23W 1953 Tropical Storm 01W 1954 Tropical Storm 07W 1954 Tropical Storm 08W 1954 Tropical Storm 15W 1954

Storm Year Peak classification Tropical Storm 09W 1955 Tropical Storm 17W 1955 Tropical Storm 20W 1955 Tropical Storm 02W 1956 Tropical Storm 04W 1956 Tropical Storm 08W 1956 Tropical Storm 18W 1956 Tropical Storm 01W 1957 Tropical Storm 08W 1957 Tropical Storm 17W 1957 Tropical Storm 06W 1995 Tropical Storm 24W 1996 Tropical Storm 35W 1996 Tropical Storm 38W 1996 Tropical Storm 03W 1998

North Indian Ocean Due to differences in wind speed criteria between the India Meteorological Department and the Joint Typhoon Warning Center, a system will sometimes be considered a tropical storm by the JTWC but only a depression by the IMD. This results in several apparent unnamed systems. Because the IMD is responsible for naming, unnamed cyclones that met the JTWC's tropical storm criteria but not those of the IMD are excluded.

Naming has taken place since mid-2003.

There have been no unnamed tropical cyclones using the India Meteorological Department's criteria. One system, 2007's Yemyin, was upgraded after the fact and retroactively named.

South-West Indian Ocean

Tropical cyclones have been named within this basin since 1960, with any tropical or subtropical depressions that RSMC La Réunion analyze as having 10-minute sustained windspeeds of at least 65 km/h, 40 mph being named. However, unlike other basins RSMC La Réunion does not name tropical depressions, as they delegate the rights to name tropical cyclones to the subregional tropical cyclone warning centers in Mauritius or Madagascar depending on whether the system is located east or west of the 55th meridian east.

Storm Year Peak classification Moderate Tropical Storm F1 1998–99 Subtropical Depression 13 1999–2000 Moderate Tropical Storm 10 2000–01 Subtropical Depression 11 2000–01 Subtropical Depression 15 2006–07 Tropical Cyclone 01U 2007–08 Subtropical Depression 10 2009–10 Subtropical Depression 09 2010–11 Subtropical Depression 13 2013–14 Moderate Tropical Storm 01 2018–19 Moderate Tropical Storm 08 2021–22 Moderate Tropical Storm 09 2022–23

Australian region

Storm Year Peak classification Five 1964–65 Six 1964–65 Six 1965–66 Nine 1965–66 Two 1967–68 Three 1967–68 Eleven 1967–68 Thirteen 1967–68 Seventeen 1967–68 Fifteen 1968–69 Sixteen 1968–69 One 1969–70 Seven 1969–70

Storm Year Peak classification "Flores" 1972–73 Tropical Cyclone 04U 1981–82 Tropical Cyclone 06U 1983–84 Tropical Cyclone 01U 2002–03 Tropical Cyclone 01U 2007–08 Tropical Cyclone 25U 2010–11 Tropical Cyclone 22U 2016–17 Tropical Cyclone 01U 2022–23 Tropical Cyclone 09U 2024–25 Tropical Cyclone 25U 2024–25

South Pacific Ocean

Storm Year Peak classification One 1971–72 Six 1971–72 One 1973–74 Five 1976–77 Six 1976–77 Five 1980–81 Seven 1980–81 Four 1983–84 Six 1983–84 One 1984–85 Tropical Cyclone 19P 1986–87 Two 1990–91 Tropical Cyclone 29P 1996–97

Notes

References

Unless otherwise indicated, all storms come from the following datasets from the Regional Specialized Meteorological Center: Atlantic: Western north Pacific: Northern Indian, western north Pacific, Southern Hemisphere: Southwestern Indian Ocean:

External links Unisys Weather Data