List of unnamed tropical cyclones

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

In order to ease communications and advisories,^[1] 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 2005 Azores subtropical storm from the 2005 Atlantic hurricane season.^[2]

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.

The unnamed hurricane or "Perfect Storm" of 1991

Naming has been used since the 1950 season.

• Tropical Storm 12 – 1950
• Tropical Storm 1 – 1952
• Tropical Storm 3 – 1953
• Tropical Storm 7 – 1953
• Tropical Storm 10 – 1953
• Tropical Storm 11 – 1953
• Tropical Storm 13 – 1953
• Tropical Storm 14 – 1953
• Hurricane 8 – 1954
• Tropical Storm 10 – 1954
• Tropical Storm 5 – 1955
• Tropical Storm 11 – 1955
• Tropical Storm 1 – 1956
• Tropical Storm 1 – 1957
• Tropical Storm 8 – 1957
• Hurricane 3 – 1959
• Tropical Storm 1 – 1960
• Tropical Storm 6 – 1961
• Tropical Storm 3 – 1963
• Tropical Storm 1 – 1964
• Tropical Storm 2 – 1964
• Tropical Storm 12 – 1964
• Tropical Storm 1 – 1965
• Hurricane 10 – 1969
• Tropical Storm 11 – 1969
• Tropical Storm 16 – 1969
• Hurricane 17 – 1969
• Tropical Storm 4 – 1970
• Hurricane 9 – 1970
• Hurricane 10 – 1970
• Hurricane 2 – 1971
• Tropical Storm 1 – 1987
• Tropical Storm 7 – 1988
• Hurricane 8 – 1991 – was deliberately left unnamed to avoid any confusion as the news media was focused, on the Perfect Storm and was expected to be short-lived and primarily of concern to maritime interests.^[3]
• Subtropical Storm 19 – 2005
• Tropical Storm 2 – 2006
• Tropical Storm 12 – 2011 – advisories were not issued on this system during August/September 2011, because of the intermittent nature of the convection and the somewhat frontal nature of the satellite presentation.^[4]
• Subtropical Storm 15 – 2013

Eastern and central north Pacific Ocean

The unnamed tropical storm in 1996

Naming began in 1960. Before 1957, a few systems in the central Pacific basin were given names, generally in an ad hoc manner.

• Unnamed August tropical storm 1962 – This system was upgraded from a tropical depression to a tropical storm after a letter from a ship called the Golden State prompted a re evaluation of the system.^[5]
• Unnamed September tropical storm 1962 – This system was upgraded from a tropical depression to a tropical storm after a ship called the Richfield reported sustained winds of 115 km/h (70 mph).^[5]
• Unnamed tropical storm – 1963 – This system was not named or numbered as a tropical cyclone operationally, but has been recognized as an Unnamed tropical storm since.^[6][7]
• Pacific Northwest hurricane – 1975
• Tropical Storm One-E – Was upgraded from a tropical depression to a tropical storm after the United States Coast Guard relayed ship reports to the National Hurricane Center, that suggested the cyclone was a tropical storm.^[8]

Western north Pacific Ocean

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. This results in several apparent unnamed systems. Because the JMA is responsible for naming, "unnamed tropical cyclones" that met the JTWC's tropical storm criteria but not those of the JMA are excluded.

• Tropical Storm 1 – 1957
• Tropical Storm 8 – 1957
• Tropical Storm 9 – 1957
• Tropical Storm 17W – 1957
• Tropical Storm 33 – 1965
• Tropical Storm 09 – 1986
• Tropical Storm 15 – 1986
• Tropical Storm 06S – 1990
• Tropical Storm 06W – 1995
• Tropical Storm 17 – 2000
• Tropical Storm 22 – 2000

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 tropical 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.^[9]

South-west Indian Ocean

The unnamed subtropical storm from the 2006–07 season

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

• Moderate Tropical Storm F1
• Subtropical Depression 13 (2000)
• Subtropical Depression 15 – 2000–01
• Subtropical Depression 15 (2006)
• Tropical Cyclone 01U (2008)
• Subtropical Depression 10 (2010)
• Subtropical Depression 09 (2011)
• Subtropical Depression 13 (2014)

Australian region

The unnamed cyclone of the 2002–03 season

• Cyclone 5 – 1964–65
• Cyclone 6 – 1964–65
• Cyclone 6 – 1965–66
• Cyclone 9 – 1965–66
• Cyclone 2 – 1967–68
• Cyclone 3 – 1967–68
• Cyclone 11 – 1967–68
• Cyclone 13 – 1967–68
• Cyclone 17 – 1967–68
• Cyclone 15 – 1968–69
• Cyclone 16 – 1968–69
• Cyclone 1 – 1969–70
• Cyclone 7 – 1969–70
• Unrecorded Cyclone^[10]
• Cyclone 2 – 1981–82
• Cyclone 6 – 1983–84
• Cyclone 8 – 1995–96
• Cyclone 1 – 2002–03
• Tropical Cyclone 01U – 2007–08 ^[11]

South Pacific

• Unnamed Tropical Cyclone 1971–72 – December 1971
• Unnamed Tropical Cyclone 1971–72 – January 1972
• Unnamed Tropical Cyclone 1973–74 – November 1973
• Unnamed Tropical Cyclone 1976–77 – February 1977 (1)
• Unnamed Tropical Cyclone 1976–77 – February 1977 (2)
• Unnamed Tropical Cyclone 1980–81 – February 1981
• Unnamed Tropical Cyclone 1980–81 – February/March 1981
• Unnamed Tropical Cyclone 1980–81 – March 1981
• Unnamed Tropical Cyclone 1983–84 – February 1984
• Unnamed Tropical Cyclone 1983–84 – March 1984
• Unnamed Tropical Cyclone 1984–85 – December 1985
• Unnamed Tropical Cyclone 1986–87 – March 1987
• Unnamed Tropical Cyclone 1988–89 – February 1989
• Unnamed tropical cyclone 1990–91 – December 1990
• Tropical Cyclone 29P could not be named during February 1997 as it had developed into a tropical cyclone within the subtropic region of the Southern Pacific.^[12][13]

References

Unless otherwise indicated, all storms come from the following datasets from the Regional Specialized Meteorological Center:

• Atlantic: ^[14]
• Western north Pacific: "RSMC Best Track Data (Text)". Japan Meteorological Agency. Retrieved 2008-06-21. 
• Northern Indian, western north Pacific, Southern Hemisphere: "JTWC Tropical Cyclone Best Track Data Site". Joint Typhoon Warning Center. 2007-08-09. Retrieved 2008-05-21. 
• Southwestern Indian Ocean: "Untitled". Météo-France. Archived from the original on 2008-04-21. Retrieved 2008-06-21. 

External links

• Unisys Weather Data