List of South-West Indian Ocean severe tropical storms

Satellite image of Tropical Storm Jasmine

Within the South-West Indian Ocean, the term severe tropical storms is reserved for those systems, that have winds of at least 50 knots (95 km/h; 60 mph). It is the third-highest classification used within the South-West Indian Ocean to classify tropical cyclones with.

Background

The South-West Indian Ocean tropical cyclone basin is located to the south of the Equator between Africa and 90°E.[1] The basin is officially monitored by Météo-France who run the Regional Specialised Meteorological Centre in La Réunion, while other meteorological services such as the Australian Bureau of Meteorology, Mauritius Meteorological Service as well as the United States Joint Typhoon Warning Center also monitor the basin.[1] Within the basin a severe tropical storm is a tropical storm that has 10-minute maximum sustained wind speeds between 48–63 kn (89–117 km/h; 55–72 mph).[1]

Systems

Name Duration Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Wind speed Pressure
Roma 18 February 23, 1973 100 km/h (65 mph) 982 hPa (29.00 inHg) None None None [2][3]
Honorine April 12 – 23, 1974 95 km/h (60 mph) 998 hPa (29.47 inHg) None None None [4]
Norah November 1 – 4, 1974 95 km/h (60 mph) 988 hPa (29.18 inHg) Christmas Island, Cocos Island None None [5]
Ines March 9 – 19, 1975 110 km/h (70 mph) 985 hPa (29.09 inHg) None None None [6]
Junon April 18 – 22, 1975 95 km/h (60 mph) 1005 hPa (29.68 inHg) None None None [6]
Kevin May 5 – 12, 1979 95 km/h (60 mph) 986 hPa (29.12 inHg) None None None [7]
Tony August 26 – 31, 1979 95 km/h (60 mph) 990 hPa (29.23 inHg) None None None [8]
Ikonjo May 11 – 20, 1990 95 km/h (60 mph) 976 hPa (28.82 inHg) Seychelles Minimal None [9][10]
Antoinette October 15 – 21, 1996 115 km/h (70 mph) 965 hPa (28.50 inHg) None None None [11][12]
Alex-Andree October 28 — 30, 2001 95 km/h (60 mph) 985 hPa (29.09 inHg) None None None [13]
Juba May 5 — 15, 2004 100 km/h (65 mph) 975 hPa (28.79 inHg) None None None [14]

2010's

Name Duration Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Wind speed Pressure
Adjali November 15 – 21, 2014 100 km/h (65 mph) 987 hPa (29.15 inHg) None None None [15]
Chedza January 14 – 19, 2015 105 km/h (65 mph) 975 hPa (28.79 inHg) Southern Africa, Madagascar, Réunion $40 million 80 [16][17][18]
Fundi February 5 – 8, 2015 100 km/h (65 mph) 978 hPa (28.88 inHg) Madagascar Unknown 5 [19]
Glenda February 22 – 28, 2015 95 km/h (60 mph) 970 hPa (28.64 inHg) None None None [20]
Ikola April 5 – 6, 2017 105 km/h (65 mph) 982 hPa (29.00 inHg) None None None [21]
Abela July 12 – 20, 2016 95 km/h (60 mph) 987 hPa (29.15 inHg) Madagascar Unknown None [22]
Flamboyan April 28 – May 1, 2018 110 km/h (70 mph) 978 hPa (28.88 inHg) None None None [23]
Bongoyo December 4 — 10, 2020 100 km/h (65 mph) 988 hPa (29.18 inHg) Cocos Islands None None
Chalane December 19 – 30, 2020 110 km/h (70 mph) 983 hPa (29.03 inHg) Madagascar, Mozambique, Zimbabwe, Botswana, Namibia Minimal 7
Danilo December 28, 2020 — January 12, 2021 100 km/h (65 mph) 981 hPa (28.97 inHg) Chagos Archipelago None None
Ana January 20 — 20, 2022 95 km/h (60 mph) 987 hPa (29.15 inHg) Mascarene Islands, Madagascar, Southern Africa 25 million 142
Fezile February 16 — 18, 2022 95 km/h (60 mph) 978 hPa (28.88 inHg) None None None
Jasmine April 21 — 27, 2022 110 km/h (70 mph) 982 hPa (29.00 inHg) Comoros, Mozambique, Madagascar Unknown 10
Candice January 26, 2024 95 km/h (60 mph) 985 hPa (29.09 inHg) Mauritius Unknown None
Eleanor February 21–23, 2024 100 km/h (65 mph) 984 hPa (29.06 inHg) Mauritius, Reunion Unknown None

Climatology

Intense tropical cyclones by month
Month Number of storms
January
0
February
0
March
0
April
0
May
0
June
0
July
0
August
0
September
0
October
0
November
0
December
3
Severe tropical storms by decade
Decade Number of storms
1970s
0
1980s
0
1990s
0
2000s
0
2010s
0
2020s
4

See also

References

  1. ^ a b c RA I Tropical Cyclone Committee (2023). Tropical Cyclone Operational Plan for the South-West Indian Ocean (PDF) (Report). World Meteorological Organization.
  2. ^ "1973 Severe Tropical Storm Roma (1973108S12082)". International Best Track Archive for Climate Stewardship. Retrieved April 6, 2022.
  3. ^ "Tropical Cyclone Roma" (PDF). Australian Bureau of Meteorology. Retrieved April 6, 2022.
  4. ^ "Saison 1973-1974 des perturbations tropicales dans l'océan indien du sud-ouest" [1973-1974 Tropical disturbance season in the southwestern Indian Ocean]. Météorologie Maritime (in French). No. 87. 1975. pp. 46–49. ISSN 0222-5123.
  5. ^ "1974 Tropical Cyclone Norah (1974301S08105)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  6. ^ a b "Saison 1974-1975 des perturbations tropicales dans l'océan indien du sud-ouest" [1974-1975 Tropical disturbance season in the southwestern Indian Ocean]. Météorologie Maritime (in French). No. 87. 1976. pp. 40–48. ISSN 0222-5123.
  7. ^ "1979 Severe Tropical Storm Kevin (1979122S04095)". International Best Track Archive for Climate Stewardship. Retrieved May 13, 2022.
  8. ^ Tropical Cyclone Tony (Report). Australian Bureau of Meteorology. Retrieved May 13, 2022.
  9. ^ "1990 Tropical Cyclone Ikonjo (1990130S03081)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  10. ^ Cahng Seng, Denis; Guillande, Richard (July 8, 2009). Disaster risk profile of the Republic of Seychelles (PDF) (Report). United Nations Development Programme. pp. 43, 44, 45, 51. Retrieved December 3, 2011.
  11. ^ Saison Cyclonique Sud-Ouest 1996-1997 dans de l'océan Indien [Cyclone Season 1996-1997 in the South-West Indian Ocean] (PDF) (Report) (in French). Météo-France. Archived from the original (PDF) on March 7, 2022. Retrieved May 11, 2022.
  12. ^ "1996 Tropical Cyclone Antoinette (1996289S05093)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  13. ^ "2001 Severe Tropical Storm Alex:Andre (2001298S07098)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  14. ^ "2004 Tropical Cyclone Juba (2004125S08084)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  15. ^ "2014 Severe Tropical Storm Adjali (2014319S06066)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  16. ^ "2015 Tropical Cyclone Chedza (2015013S18038)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  17. ^ "Flood death toll across Southern Africa reaches 260". Chicago Tribune. Retrieved January 21, 2015.
  18. ^ "Madagascar tropical storm claims 46 lives". Yahoo! News! via AP. Retrieved January 21, 2015.
  19. ^ "2015 Severe Tropical Storm Fundi (2015036S20038)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  20. ^ "2015 Severe Tropical Storm Glenda (2015050S11094)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  21. ^ "2016 Severe Tropical Cyclone Ikola (2015094S10087)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  22. ^ "2016 Severe Tropical Storm Abela (2016195S06076)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.
  23. ^ "2018 Tropical Cyclone Flamboyan (2018117S07098)". International Best Track Archive for Climate Stewardship. Retrieved May 8, 2022.