1979–80 South-West Indian Ocean cyclone season: Difference between revisions

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	The '''1979–80 South-West Indian Ocean cyclone season''' was an above-average cyclone season. The season officially ran from November 1, 1979, to April 30, 1980.		The '''1979–80 South-West Indian Ocean cyclone season''' was an above-average cyclone season, and is most notable for featuring the wettest tropical cyclone ever recorded, ]. The season officially ran from November 1, 1979, to April 30, 1980.

	== Systems ==		== Systems ==
Line 31:		Line 31:
	AlignBars = early		AlignBars = early
	DateFormat = dd/mm/yyyy		DateFormat = dd/mm/yyyy
	Period = from:01/08/1979 till:30/04/1980		Period = from:01/11/1979 till:30/04/1980
	TimeAxis = orientation:horizontal		TimeAxis = orientation:horizontal
	ScaleMinor = grid:black unit:month increment:1 start:01/08/1979		ScaleMinor = grid:black unit:month increment:1 start:01/11/1979
	Colors =		Colors =
	id:canvas value:gray(0.88)		id:canvas value:gray(0.88)
	id:GP value:red		id:GP value:red
	id:ZD value:rgb(0.5,0.8,1) legend:Zone_of_Disturbed_Weather/~~Tropical_Disturbance~~		id:ZD value:rgb(0,0.52,0.84) legend:Zone_of_Disturbed_Weather/Tropical_Disturbance_=_≤31_mph_(≤50_km/h)
	id:TD value:rgb(0.38,0.73,1) legend:Tropical_Depression		id:TD value:rgb(0.43,0.76,0.92) legend:Tropical_Depression/Subtropical_Depression_=_32–38_mph_(51–62_km/h)
	id:TS value:rgb(0,0.98,~~0.96~~) legend:~~Moderate_Tropical_Storm~~		id:TS value:rgb(0.30,1,1) legend:Moderate_Tropical_Storm_=_39–54_mph_(63–88_km/h)
	id:ST value:rgb(0.80,1,1) legend:~~Severe_Tropical_Storm~~		id:ST value:rgb(0.75,1,0.75) legend:Severe_Tropical_Storm_=_55–73_mph_(89–118_km/h)
	id:TC value:rgb(1,1,0.80) legend:~~Tropical_Cyclone~~		id:TC value:rgb(1,0.85,0.55) legend:Tropical_Cyclone_=_74–103_mph_(119–166_km/h)
	id:IT value:rgb(1,0.76,0.25) legend:~~Intense_Tropical_Cyclone~~		id:IT value:rgb(1,0.45,0.54) legend:Intense_Tropical_Cyclone_=_104–133_mph_(167–214_km/h)
	id:VI value:rgb(1,0.38,0.38) legend:~~Very_Intense_Tropical_Cyclone~~		id:VI value:rgb(0.55,0.46,0.9) legend:Very_Intense_Tropical_Cyclone_=_≥134_mph_(≥215_km/h)

	Backgroundcolors = canvas:canvas		Backgroundcolors = canvas:canvas
Line 53:		Line 53:
	PlotData=		PlotData=
	barset:Hurricane width:11 align:left fontsize:S shift:(4,-4) anchor:till		barset:Hurricane width:11 align:left fontsize:S shift:(4,-4) anchor:till
⚫	from:31/08/~~1979~~ till:31/08/~~1979~~ color:ZD text:~~Tony~~ (~~TDi~~)"
	from:25/11/1979 till:06/12/1979 color:IT text:Albine (ITC)"		from:25/11/1979 till:06/12/1979 color:IT text:Albine (ITC)"
	from:15/12/1979 till:18/12/1979 color:TD text:Berenice (TD)"		from:15/12/1979 till:18/12/1979 color:TS text:Berenice (MTS)"
	from:18/12/1979 till:28/12/1979 color:IT text:Viola-Claudette (ITC)"		from:18/12/1979 till:28/12/1979 color:IT text:Viola-Claudette (ITC)"
	from:01/01/1980 till:03/01/1980 color:TD text:Wilf-Danitza (TD)"		from:01/01/1980 till:03/01/1980 color:TD text:Wilf-Danitza (TD)"
Line 62:		Line 61:
	from:10/01/1980 till:13/01/1980 color:TD text:Gudule (TD)"		from:10/01/1980 till:13/01/1980 color:TD text:Gudule (TD)"
	barset:break		barset:break
	from:15/01/1980 till:28/01/1980 color:TC text:Hyacinthe (TC)"		from:15/01/1980 till:28/01/1980 color:IT text:Hyacinthe (ITC)"
	from:24/01/1980 till:26/01/1980 color:TD text:Ivanne (TD)"		from:24/01/1980 till:26/01/1980 color:TD text:Ivanne (TD)"
	from:01/02/1980 till:07/02/1980 color:IT text:Jacinthe (ITC)"		from:01/02/1980 till:07/02/1980 color:IT text:Jacinthe (ITC)"
	from:25/02/1980 till:08/03/1980 color:ST text:Kolia (STS)"		from:25/02/1980 till:08/03/1980 color:ST text:Kolia (STS)"
		⚫	from:03/03/1980 till:15/03/1980 color:IT text:Laure (ITC)"
	from:14/03/1980 till:20/03/1980 color:TS text:22S (MTS)"		from:14/03/1980 till:20/03/1980 color:TS text:22S (MTS)"

	bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas		bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas
	from:01/08/1979 till:31/08/1979 text:August
	from:01/09/1979 till:30/09/1979 text:September
	from:01/10/1979 till:31/10/1979 text:October
	from:01/11/1979 till:30/11/1979 text:November		from:01/11/1979 till:30/11/1979 text:November
	from:01/12/1979 till:31/12/1979 text:December		from:01/12/1979 till:31/12/1979 text:December
Line 109:		Line 106:
	\|Dissipated=December 6		\|Dissipated=December 6
	\|10-min winds=105		\|10-min winds=105
	\|1-min winds=~~100~~		\|1-min winds=90
	\|Pressure=		\|Pressure=960
	}}		}}
	Albine existed from 25 November to 6 December.		Albine existed from 25 November to 6 December.
Line 122:		Line 119:
	\|Formed=December 18 <small>(Crossed 80°E)</small>		\|Formed=December 18 <small>(Crossed 80°E)</small>
	\|Dissipated=December 28		\|Dissipated=December 28
	\|10-min winds=~~110~~		\|10-min winds=115
	\|1-min winds=110		\|1-min winds=110
	\|Pressure=~~930~~		\|Pressure=955
	}}		}}
	] entered the basin on December 18 from the Australian region, whereupon it became Cyclone Claudette.<ref>{{cite report\|title=Severe Tropical Cyclone Viola\|publisher=]\|location=Melbourne, Victoria\|url=http://www.bom.gov.au/cyclone/history/viola.shtml\|access-date=September 19, 2022}}</ref> After passing southeast of St. Brandon, Claudette struck Mauritius on December 22, producing wind gusts of {{convert\|221\|km/h\|mph\|abbr=on}}. The storm caused 5 fatalities, 257 injuries, and US$175 million in damage on the island. About 5,000 houses were destroyed or severely damaged. Effects on neighboring Réunion were limited to {{convert\|79\|km/h\|mph\|abbr=on}} wind gusts and some rainfall.<ref name="mau">{{cite web\|publisher=Mauritius Meteorological Services\|title=List of Historical Cyclones\|accessdate=February 4, 2019\|url=http://metservice.intnet.mu/publications/list-of-historical-cyclones.php}}</ref><ref name="usaid">{{cite web\|author=Office of U.S. Foreign Disaster Assistance\|title=Significant Data on Major Disasters Worldwide 1900-present\|date=August 1993\|page=140\|accessdate=February 5, 2019\|url=http://pdf.usaid.gov/pdf_docs/PNABP986.pdf}}</ref><ref>{{cite news\|title=Bee Swarms\|date=January 1, 1980\|newspaper=The Canberra Times\|agency=Australian Associated Press\|url=https://trove.nla.gov.au/newspaper/article/137005695?searchTerm=cyclone%20claudette%20%20%20%20%20%20%20%20%20%20%20%20&searchLimits=}}</ref><ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Cyclone Claudette, 10–28 December\|year=1996\|work=National Climatic Data Center\|accessdate=February 5, 2019\|url={{GTECCA url\|basin=SWI\|year=1979_13}}}}</ref>		] entered the basin on December 18 from the Australian region, whereupon it became Cyclone Claudette.<ref>{{cite report\|title=Severe Tropical Cyclone Viola\|publisher=]\|location=Melbourne, Victoria\|url=http://www.bom.gov.au/cyclone/history/viola.shtml\|access-date=September 19, 2022}}</ref> After passing southeast of St. Brandon, Claudette struck Mauritius on December 22, producing wind gusts of {{convert\|221\|km/h\|mph\|abbr=on}}. The storm caused 5 fatalities, 257 injuries, and US$175 million in damage on the island. About 5,000 houses were destroyed or severely damaged. Effects on neighboring Réunion were limited to {{convert\|79\|km/h\|mph\|abbr=on}} wind gusts and some rainfall.<ref name="mau">{{cite web\|publisher=Mauritius Meteorological Services\|title=List of Historical Cyclones\|accessdate=February 4, 2019\|url=http://metservice.intnet.mu/publications/list-of-historical-cyclones.php}}</ref><ref name="usaid">{{cite web\|author=Office of U.S. Foreign Disaster Assistance\|title=Significant Data on Major Disasters Worldwide 1900-present\|date=August 1993\|page=140\|accessdate=February 5, 2019\|url=http://pdf.usaid.gov/pdf_docs/PNABP986.pdf}}</ref><ref>{{cite news\|title=Bee Swarms\|date=January 1, 1980\|newspaper=The Canberra Times\|agency=Australian Associated Press\|url=https://trove.nla.gov.au/newspaper/article/137005695?searchTerm=cyclone%20claudette%20%20%20%20%20%20%20%20%20%20%20%20&searchLimits=}}</ref><ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Cyclone Claudette, 10–28 December\|year=1996\|work=National Climatic Data Center\|accessdate=February 5, 2019\|url={{GTECCA url\|basin=SWI\|year=1979_13}}}}</ref>
	{{clear}}		{{clear}}

	===~~Severe~~ Tropical Storm Berenice===		===Moderate Tropical Storm Berenice===
	{{Infobox hurricane small		{{Infobox hurricane small
	\|Basin=SWI		\|Basin=SWI
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	\|Formed=December 15		\|Formed=December 15
	\|Dissipated=December 21		\|Dissipated=December 21
	\|10-min winds=50		\|10-min winds=35
	\|1-min winds=35		\|1-min winds=35
	\|Pressure=		\|Pressure=1000
	}}		}}
	Berenice existed from 15 December to 21 December.		Berenice existed from 15 December to 21 December.
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	{{clear}}		{{clear}}

	===Tropical Cyclone Hyacinthe===		===Intense Tropical Cyclone Hyacinthe===
	{{Infobox hurricane small		{{Infobox hurricane small
	\|Basin=SWI		\|Basin=SWI
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	\|Formed=January 15		\|Formed=January 15
	\|Dissipated=January 31		\|Dissipated=January 31
	\|10-min winds=72		\|10-min winds=90
	\|1-min winds=70		\|1-min winds=70
	\|Pressure=~~955~~		\|Pressure=960
	}}		}}
	{{main\|Cyclone Hyacinthe}}		{{main\|Cyclone Hyacinthe}}
	Hyacinthe formed on January 15, 1980, to the northeast of ] in the southern ]. Initially it moved to the west-southwest, and while slowly intensifying it passed north of the French ] of ]. On January 19, ] estimated that the storm had intensified to a ]. Hyacinthe looped to the south of eastern ] and weakened, although it restrengthened after turning to the east. The storm executed another loop to the southwest of Réunion, passing near the island for a second and later third time. Hyacinthe became ] on January 29 after turning southward, dissipating two days later.		Hyacinthe formed on January 15, 1980, to the northeast of ] in the southern ]. Initially it moved to the west-southwest, and while slowly intensifying it passed north of the French ] of ]. On January 19, ] estimated that the storm had intensified to a ]. Hyacinthe looped to the south of eastern ] and weakened, although it restrengthened after turning to the east. The storm executed another loop to the southwest of Réunion, passing near the island for a second and later third time. Hyacinthe became ] on January 29 after turning southward, dissipating two days later.

	Tropical Cyclone Hyacinthe set several worldwide tropical cyclone rainfall records in ] in the Southwestern Indian Ocean, including a peak total of 5678 mm (223.5 inches).<ref name="mfreport">{{cite web\|author=Météo-France \|year=2007 \|title=Avec GAMEDE et 27 ans après HYACINTHE, La Réunion bat ses propres records mondiaux de précipitations sur les durées de 3 à 9 jours \|language=French \|accessdate=April 12, 2008 \|url=http://www.meteo.fr/temps/domtom/La_Reunion/Evenement_du_mois/AccueilEvenement.html \|url-status=dead \|archiveurl=https://web.archive.org/web/20070328081503/http://www.meteo.fr/temps/domtom/La_Reunion/Evenement_du_mois/AccueilEvenement.html \|archivedate=March 28, 2007 }}</ref> For twelve days, Hyacinthe dropped torrential rainfall on Réunion; nearly all of the island received more than 1 m (3.3 ft) of precipitation. Over a 15‑day period from January 14 to January 28, {{convert\|6083\|mm\|in\|abbr=on}} of rainfall were recorded at Commerson's Crater, a volcano. The heaviest rainfall occurred through a process called ] in the mountainous interior, leading to hundreds of landslides. Widespread floods washed out roads and isolated three villages. Hyacinthe caused heavy damage to crops and damaged or destroyed 2,000 houses. Losses from the storm totaled $167 million (1980 ], 676 million ]), and 25 people were killed.		Tropical Cyclone Hyacinthe set several worldwide tropical cyclone rainfall records in ] in the Southwestern Indian Ocean, including a peak total of 5678 mm (223.5 inches).<ref name="mfreport">{{cite web\|author=Météo-France \|year=2007 \|title=Avec GAMEDE et 27 ans après HYACINTHE, La Réunion bat ses propres records mondiaux de précipitations sur les durées de 3 à 9 jours \|language=French \|accessdate=April 12, 2008 \|url=http://www.meteo.fr/temps/domtom/La_Reunion/Evenement_du_mois/AccueilEvenement.html \|url-status=dead \|archiveurl=https://web.archive.org/web/20070328081503/http://www.meteo.fr/temps/domtom/La_Reunion/Evenement_du_mois/AccueilEvenement.html \|archivedate=March 28, 2007 }}</ref> For twelve days, Hyacinthe dropped torrential rainfall on Réunion; nearly all of the island received more than 1 m (3.3 ft) of precipitation. Over a 15‑day period from January 14 to January 28, {{convert\|6083\|mm\|in\|abbr=on}} of rainfall were recorded at Commerson's Crater, a volcano. The heaviest rainfall occurred through a process called ] in the mountainous interior, leading to hundreds of landslides. Widespread floods washed out roads and isolated three villages. Hyacinthe caused heavy damage to crops and damaged or destroyed 2,000 houses. Losses from the storm totaled $167 million (1980 ], 676 million ]), and 25 people were killed.
	{{Clear}}		{{Clear}}

	===Tropical Cyclone Jacinthe===		===Intense Tropical Cyclone Jacinthe===
	{{Infobox hurricane small		{{Infobox hurricane small
	\|Basin=SWI		\|Basin=SWI
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	\|Formed=February 1		\|Formed=February 1
	\|Dissipated=February 7		\|Dissipated=February 7
	\|10-min winds=		\|10-min winds=100
	\|1-min winds=100		\|1-min winds=100
	\|Pressure=		\|Pressure=955
	}}		}}
	Jacinthe existed from 1 February to 7 February. On February 3, the cyclone passed between Mauritius and Rodrigues, producing wind gusts of {{convert\|117\|km/h\|abbr=on}} and {{convert\|119\|km/h\|mph\|abbr=on}} on the respective islands.<ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Cyclone Jacinthe, 1–7 February\|year=1996\|work=National Climatic Data Center\|accessdate=February 2, 2019\|url={{GTECCA url\|basin=SWI\|year=1980_2}}}}</ref>		Jacinthe existed from 1 February to 7 February. On February 3, the cyclone passed between Mauritius and Rodrigues, producing wind gusts of {{convert\|117\|km/h\|abbr=on}} and {{convert\|119\|km/h\|mph\|abbr=on}} on the respective islands.<ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Cyclone Jacinthe, 1–7 February\|year=1996\|work=National Climatic Data Center\|accessdate=February 2, 2019\|url={{GTECCA url\|basin=SWI\|year=1980_2}}}}</ref>
	{{clear}}		{{clear}}

	===Tropical ~~Cyclone~~ Kolia===		===Severe Tropical Storm Kolia===
	{{Infobox hurricane small		{{Infobox hurricane small
	\|Basin=SWI		\|Basin=SWI
Line 199:		Line 196:
	\|Formed=February 25		\|Formed=February 25
	\|Dissipated=March 13		\|Dissipated=March 13
	\|10-min winds=		\|10-min winds=60
	\|1-min winds=60		\|1-min winds=60
	\|Pressure=		\|Pressure=985
	}}		}}
	Kolia existed from 25 February to 13 March. The storm executed two loops near the Mascarene Islands, bringing the storm between Réunion and Mauritius twice. Wind gusts reached {{convert\|80\|km/h\|mph\|abbr=on}} on Mauritius.<ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Depression Kolia, 25 February to 13 March\|year=1996\|work=National Climatic Data Center\|accessdate=February 2, 2019\|url={{GTECCA url\|basin=SWI\|year=1980_4}}}}</ref>		Kolia existed from 25 February to 13 March. The storm executed two loops near the Mascarene Islands, bringing the storm between Réunion and Mauritius twice. Wind gusts reached {{convert\|80\|km/h\|mph\|abbr=on}} on Mauritius.<ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Depression Kolia, 25 February to 13 March\|year=1996\|work=National Climatic Data Center\|accessdate=February 2, 2019\|url={{GTECCA url\|basin=SWI\|year=1980_4}}}}</ref>
	{{clear}}		{{clear}}

	===Tropical Cyclone Laure===		===Intense Tropical Cyclone Laure===
	{{Infobox hurricane small		{{Infobox hurricane small
	\|Basin=SWI		\|Basin=SWI
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	\|Formed=March 8		\|Formed=March 8
	\|Dissipated=March 17		\|Dissipated=March 17
	\|10-min winds=		\|10-min winds=90
	\|1-min winds=100		\|1-min winds=100
	\|Pressure=		\|Pressure=965
	}}		}}
	Laure existed from 8 March to 17 March. On March 13, the cyclone passed just east of Mauritius, producing wind gusts of {{convert\|109\|km/h\|mph\|abbr=on}} and {{convert\|65.7\|mm\|in\|abbr=on}} of rainfall.<ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Cyclone Laure, 8–17 March\|year=1996\|work=National Climatic Data Center\|accessdate=February 2, 2019\|url={{GTECCA url\|basin=SWI\|year=1980_4}}}}</ref>		Laure existed from 8 March to 17 March. On March 13, the cyclone passed just east of Mauritius, producing wind gusts of {{convert\|109\|km/h\|mph\|abbr=on}} and {{convert\|65.7\|mm\|in\|abbr=on}} of rainfall.<ref>{{cite report\|series=Global tropical/extratropical cyclone climatic atlas\|title=Tropical Cyclone Laure, 8–17 March\|year=1996\|work=National Climatic Data Center\|accessdate=February 2, 2019\|url={{GTECCA url\|basin=SWI\|year=1980_4}}}}</ref>
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	{{clear}}		{{clear}}

	===Tropical ~~Cyclone~~ 22S===		===Moderate Tropical Storm 22S===
	{{Infobox hurricane small		{{Infobox hurricane small
	\|Basin=SWI		\|Basin=SWI
Line 230:		Line 227:
	\|Formed=March 14		\|Formed=March 14
	\|Dissipated=March 20		\|Dissipated=March 20
	\|10-min winds=		\|10-min winds=45
	\|1-min winds=40		\|1-min winds=40
	\|Pressure=		\|Pressure=
Line 246:		Line 243:
	{{reflist}}		{{reflist}}

			{{Tropical cyclone season\|1979\|split-year=y}}
	{{TC Decades\|Year=1970\|basin=South-West Indian Ocean\|type=cyclone\|shem=yes}}		{{TC Decades\|Year=1970\|basin=South-West Indian Ocean\|type=cyclone\|shem=yes}}

Latest revision as of 20:13, 24 March 2024

Cyclone season in the Southwest Indian Ocean

1979–80 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed	August 30, 1979
Last system dissipated	March 20, 1980
Strongest storm

Name	Viola-Claudette
• Maximum winds	205 km/h (125 mph) (10-minute sustained)
• Lowest pressure	930 hPa (mbar)

Seasonal statistics
Total depressions	11
Total storms	11
Tropical cyclones	4
Intense tropical cyclones	2
Total fatalities	30
Total damage	$342 million (1980 USD)
Related articles
1979–80 Australian region cyclone season 1979–80 South Pacific cyclone season
South-West Indian Ocean tropical cyclone seasons 1977–78, 1978–79, 1979–80, 1980–81, 1981–82

The 1979–80 South-West Indian Ocean cyclone season was an above-average cyclone season, and is most notable for featuring the wettest tropical cyclone ever recorded, Cyclone Hyacinthe. The season officially ran from November 1, 1979, to April 30, 1980.

Systems

Tropical Cyclone Tony

Category 2 tropical cyclone (Australian scale)

Duration	August 27 – August 31
Peak intensity	95 km/h (60 mph) (10-min); 990 hPa (mbar)

On 26 August, the BoM reported that a tropical low had developed on a shear line about 1300 km (810 mi) to the northwest of Cocos Island. Over the next couple of days the depression gradually developed further before at 1800 UTC on 27 August, TCWC Perth estimated that it had become a tropical cyclone and named it Tony. During the next couple of days, the system moved towards the west-southwest before on 29 August it reached its peak intensity of 95 km/h (60 mph) and a peak pressure of 990 hPa (29.23 inHg) as it approached the edge of TCWC Perth's area of responsibility. During the next day, Tony moved into the South West Indian Ocean and weakened gradually before it dissipated during 31 August. Neither the Mauritius or Reunion meteorological services monitored Tony as a tropical cyclone while it was active, while it was not included in the JTWC's analysis of the season.

Intense Tropical Cyclone Albine

Intense tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)

Duration	November 25 – December 6
Peak intensity	195 km/h (120 mph) (10-min); 960 hPa (mbar)

Albine existed from 25 November to 6 December.

Intense Tropical Cyclone Viola–Claudette

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)

Duration	December 18 (Crossed 80°E) – December 28
Peak intensity	215 km/h (130 mph) (10-min); 955 hPa (mbar)

Cyclone Viola entered the basin on December 18 from the Australian region, whereupon it became Cyclone Claudette. After passing southeast of St. Brandon, Claudette struck Mauritius on December 22, producing wind gusts of 221 km/h (137 mph). The storm caused 5 fatalities, 257 injuries, and US$175 million in damage on the island. About 5,000 houses were destroyed or severely damaged. Effects on neighboring Réunion were limited to 79 km/h (49 mph) wind gusts and some rainfall.

Moderate Tropical Storm Berenice

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	December 15 – December 21
Peak intensity	65 km/h (40 mph) (10-min); 1000 hPa (mbar)

Berenice existed from 15 December to 21 December.

Tropical Depression Wilf–Danitza

Tropical depression (MFR)
Tropical storm (SSHWS)

Duration	December 23 – January 3
Peak intensity	55 km/h (35 mph) (10-min); 1000 hPa (mbar)

Wilf-Danitza existed from 23 December 1979, to 3 January 1980.

Intense Tropical Cyclone Hyacinthe

Intense tropical cyclone (MFR)
Category 1 tropical cyclone (SSHWS)

Duration	January 15 – January 31
Peak intensity	165 km/h (105 mph) (10-min); 960 hPa (mbar)

Main article: Cyclone Hyacinthe

Hyacinthe formed on January 15, 1980, to the northeast of Mauritius in the southern Indian Ocean. Initially it moved to the west-southwest, and while slowly intensifying it passed north of the French overseas department of Réunion. On January 19, Météo-France estimated that the storm had intensified to a tropical cyclone. Hyacinthe looped to the south of eastern Madagascar and weakened, although it restrengthened after turning to the east. The storm executed another loop to the southwest of Réunion, passing near the island for a second and later third time. Hyacinthe became extratropical on January 29 after turning southward, dissipating two days later.

Tropical Cyclone Hyacinthe set several worldwide tropical cyclone rainfall records in Réunion in the Southwestern Indian Ocean, including a peak total of 5678 mm (223.5 inches). For twelve days, Hyacinthe dropped torrential rainfall on Réunion; nearly all of the island received more than 1 m (3.3 ft) of precipitation. Over a 15‑day period from January 14 to January 28, 6,083 mm (239.5 in) of rainfall were recorded at Commerson's Crater, a volcano. The heaviest rainfall occurred through a process called orographic lift in the mountainous interior, leading to hundreds of landslides. Widespread floods washed out roads and isolated three villages. Hyacinthe caused heavy damage to crops and damaged or destroyed 2,000 houses. Losses from the storm totaled $167 million (1980 USD, 676 million francs), and 25 people were killed.

Intense Tropical Cyclone Jacinthe

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)

Duration	February 1 – February 7
Peak intensity	185 km/h (115 mph) (10-min); 955 hPa (mbar)

Jacinthe existed from 1 February to 7 February. On February 3, the cyclone passed between Mauritius and Rodrigues, producing wind gusts of 117 km/h (73 mph) and 119 km/h (74 mph) on the respective islands.

Severe Tropical Storm Kolia

Severe tropical storm (MFR)
Tropical storm (SSHWS)

Duration	February 25 – March 13
Peak intensity	110 km/h (70 mph) (10-min); 985 hPa (mbar)

Kolia existed from 25 February to 13 March. The storm executed two loops near the Mascarene Islands, bringing the storm between Réunion and Mauritius twice. Wind gusts reached 80 km/h (50 mph) on Mauritius.

Intense Tropical Cyclone Laure

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)

Duration	March 8 – March 17
Peak intensity	165 km/h (105 mph) (10-min); 965 hPa (mbar)

Laure existed from 8 March to 17 March. On March 13, the cyclone passed just east of Mauritius, producing wind gusts of 109 km/h (68 mph) and 65.7 mm (2.59 in) of rainfall.

Moderate Tropical Storm 22S

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	March 14 – March 20
Peak intensity	85 km/h (50 mph) (10-min);

22S existed from 14 March to 20 March.

References

^ "Tropical Cyclone Tony 1979-80". Australian Bureau of Meteorology. 2010. Retrieved 14 June 2011.
Donque, G. "La saison cyclonique 1979-1980 a Madagascar" (PDF). Madagascar Rev. De Geo (in French). 38 (Janv-Juin 1981). Direction de la Meteorologie Service de La Reunion: 115–120. Archived from the original (PDF) on 2011-07-22. Retrieved 14 June 2011.
Bath, Michael (23 July 2010). "Southern Hemisphere Tropical Cyclone Season 1979-1980". Australian Severe Weather. Retrieved 14 June 2011.
Severe Tropical Cyclone Viola (Report). Melbourne, Victoria: Bureau of Meteorology. Retrieved September 19, 2022.
"List of Historical Cyclones". Mauritius Meteorological Services. Retrieved February 4, 2019.
Office of U.S. Foreign Disaster Assistance (August 1993). "Significant Data on Major Disasters Worldwide 1900-present" (PDF). p. 140. Retrieved February 5, 2019.
"Bee Swarms". The Canberra Times. Australian Associated Press. January 1, 1980.
Tropical Cyclone Claudette, 10–28 December. National Climatic Data Center (Report). Global tropical/extratropical cyclone climatic atlas. 1996. Retrieved February 5, 2019.
Météo-France (2007). "Avec GAMEDE et 27 ans après HYACINTHE, La Réunion bat ses propres records mondiaux de précipitations sur les durées de 3 à 9 jours" (in French). Archived from the original on March 28, 2007. Retrieved April 12, 2008.
Tropical Cyclone Jacinthe, 1–7 February. National Climatic Data Center (Report). Global tropical/extratropical cyclone climatic atlas. 1996. Retrieved February 2, 2019.
Tropical Depression Kolia, 25 February to 13 March. National Climatic Data Center (Report). Global tropical/extratropical cyclone climatic atlas. 1996. Retrieved February 2, 2019.
Tropical Cyclone Laure, 8–17 March. National Climatic Data Center (Report). Global tropical/extratropical cyclone climatic atlas. 1996. Retrieved February 2, 2019.

v t e Tropical cyclones in 1979 and 1980
Cyclones	Australian region North Indian Ocean (1979 1980) South-West Indian Ocean South Pacific
Hurricanes	Atlantic (1979 1980) Pacific (1979 1980)
Typhoons	Pacific (1979 1980)
Non-seasonal lists	Mediterranean South Atlantic

1970–1979 South-West Indian Ocean cyclone seasons
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