1979–80 South-West Indian Ocean cyclone season

1979–80 South-West Indian Ocean cyclone season
Season summary map
First system formed November 25
Last system dissipated March 20
Strongest storm1 Viola-Claudette – 930 hPa (mbar), 230 km/h (145 mph) (1-minute sustained)
Total fatalities Unknown
Total damage Unknown
1Strongest storm is determined by lowest pressure
South-West Indian Ocean tropical cyclone seasons
1977–78, 1978–79, 1979–80, 1980–81, 1981–82
Related articles

The 1979–80 South-West Indian Ocean cyclone season was a below average cyclone season. The season officially ran from November 1, 1979, to April 30, 1980.

Storms

Tropical Cyclone Tony

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration 26 August – 31 August
Peak intensity 95 km/h (60 mph) (10-min)  990 hPa (mbar)

On 26 August, TCWC Perth reported that a tropical low had developed on a shear line about 1300 km (810 mi) to the northwest of Cocos Island.[1] 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.[1] 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.[1] During the next day, Tony moved into the South West Indian Ocean and weakened gradually before it dissipated during 31 August.[1] 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.[1][2][3]

Intense Tropical Cyclone Albine

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)
Duration 25 November – 6 December
Peak intensity 195 km/h (120 mph) (10-min) 

Albine existed from 25 November to 6 December.

Intense Tropical Cyclone Viola-Claudette

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)
Duration 10 December – 28 December
Peak intensity 205 km/h (125 mph) (10-min)  930 hPa (mbar)

Viola-Claudette existed from 10 December to 28 December.

Severe Tropical Storm Berenice

Severe tropical storm (MFR)
Tropical storm (SSHWS)
Duration 15 December – 21 December
Peak intensity 95 km/h (60 mph) (10-min) 

Berenice existed from 15 December to 21 December.

Severe Tropical Cyclone Wilf-Danitza

Category 3 severe tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration 23 December – 3 January
Peak intensity 130 km/h (80 mph) (10-min)  973 hPa (mbar)

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

Tropical Cyclone Hyacinthe

Tropical cyclone (MFR)
Category 1 tropical cyclone (SSHWS)
Duration 15 January – 31 January
Peak intensity 135 km/h (85 mph) (10-min)  955 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).[4] 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.

Cyclone Jacinthe

Category 3 tropical cyclone (SSHWS)
Duration 1 February – 7 February
Peak intensity 185 km/h (115 mph) (1-min) 

Jacinthe existed from 1 February to 7 February.

Cyclone Fred

Category 2 tropical cyclone (SSHWS)
Clockwise vortex
Duration February 20 – February 28
Peak intensity 175 km/h (110 mph) (1-min) 

Fred existed from 20 February to 28 February.

Cyclone Kolia

Tropical storm (SSHWS)
Clockwise vortex
Duration 25 February – 13 March
Peak intensity 110 km/h (70 mph) (1-min) 

Kolia existed from 25 February to 13 March.

Cyclone Laure

Category 3 tropical cyclone (SSHWS)
Duration 8 March – 17 March
Peak intensity 185 km/h (115 mph) (1-min) 

Laure existed from 8 March to 17 March.

Cyclone 22S

Tropical storm (SSHWS)
Clockwise vortex
Duration 14 March – 20 March
Peak intensity 75 km/h (45 mph) (1-min) 

22S existed from 14 March to 20 March.

See also

References

  1. 1 2 3 4 5 Unattributed (2010). "Tropical Cyclone Tony 1979-80". Bureau of Meteorology. Retrieved 14 June 2011.
  2. ↑ Donque, G. "La saison cyclonique 1979-1980 a Madagascar" (PDF). Madagascar Rev. de Geo (in French). Direction de la Meteorologie Service de La Reunion. 38 (Janv-Juin 1981): 115–120. Retrieved 14 June 2011.
  3. ↑ Bath, Michael (23 July 2010). "Southern Hemisphere Tropical Cyclone Season 1979-1980". Australian Severe Weather. Retrieved 14 June 2011.
  4. ↑ 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 22, 2007. Retrieved April 12, 2008.
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