2014–15 South-West Indian Ocean cyclone season

Last updated
2014–15 South-West Indian Ocean cyclone season
2014-2015 South-West Indian Ocean cyclone season summary.png
Season summary map
Seasonal boundaries
First system formedNovember 15, 2014
Last system dissipatedApril 11, 2015
Strongest storm
NameBansi
  Maximum winds220 km/h (140 mph)
(10-minute sustained)
  Lowest pressure910 hPa (mbar)
Seasonal statistics
Total disturbances14
Total depressions13
Total storms11
Tropical cyclones4
Intense tropical cyclones3
Very intense tropical cyclones2 (record high, tied with 2013–14)
Total fatalities111 total
Total damage$46.3 million (2015 USD)
Related articles
South-West Indian Ocean tropical cyclone seasons
2012–13, 2013–14, 2014–15, 2015–16, 2016–17

The 2014–15 South-West Indian Ocean cyclone season was an above average event in tropical cyclone formation. It began on November 15, 2014, and ended on April 30, 2015, with the exception for Mauritius and the Seychelles, for which it ended on May 15, 2015. These dates conventionally delimit the period of each year when most tropical and subtropical cyclones form in the basin, which is west of 90°E and south of the Equator. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion.

Tropical cyclone Is a rotating storm system

A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. Depending on its location and strength, a tropical cyclone is referred to by different names, including hurricane, typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone. A hurricane is a tropical cyclone that occurs in the Atlantic Ocean and northeastern Pacific Ocean, and a typhoon occurs in the northwestern Pacific Ocean; in the south Pacific or Indian Ocean, comparable storms are referred to simply as "tropical cyclones" or "severe cyclonic storms".

Mauritius Island nation in the Indian Ocean

Mauritius, officially the Republic of Mauritius, is an island nation in the Indian Ocean. The main Island of Mauritius is located about 2,000 kilometres (1,200 mi) off the southeast coast of the African continent. The Republic of Mauritius also includes the islands of Rodrigues, Agalega and St. Brandon. The capital and largest city Port Louis is located on the main island of Mauritius.

Seychelles Island country to the East of Africa

Seychelles, officially the Republic of Seychelles, is an archipelago country in the Indian Ocean. The capital of the 115-island country, Victoria, lies 1,500 kilometres (932 mi) east of mainland East Africa. Other nearby island countries and territories include Comoros, Mayotte, Madagascar, Réunion and Mauritius to the south; as well as the Maldives and British Indian Ocean Territory to the east. With a population of roughly 94,228, it has the smallest population of any sovereign African country.

Contents

Seasonal summary

Tropical Storm ChedzaTropical cyclone scales#Comparisons across basins2014-15 South-West Indian Ocean cyclone season

During October 2014, the Mauritius Meteorological Services issued its seasonal outlook for the summer of 2014–15 and predicted that between ten and twelve named storms would develop during the season. [1] The first tropical disturbance of the season developed on November 16, and quickly developed into the first named storm of the season and was named Adjali by Mauritius.

Systems

Severe Tropical Storm Adjali

Severe tropical storm (MFR)
Category 1 tropical cyclone (SSHWS)
Adjali 2014-11-17 0920Z.jpg   Adjali 2014 track.png
DurationNovember 15 – November 21
Peak intensity110 km/h (70 mph) (10-min)  987  hPa  (mbar)

An area of low pressure developed close to Diego Garcia on November 14. It slowly organized as it made a northwest-south-southeast loop over the next two days. By the evening of November 16, the center of the storm became more well defined with convective rainbands wrapped tightly into it. [2] Around that time, RSMC La Réunion started tracking the system as a tropical disturbance, [3] and subsequently upgraded it to a Tropical Depression. [4] Later that day, the JTWC issued a tropical cyclone formation alert on the system. [5] The depression strengthened further and became the first named tropical storm of the year, on the same day. Mauritius Meteorological Service, which usually names storms in the region, named the system Adjali. [6] The JTWC also initiated advisories on Adjali. [7] On November 17, MFR upgraded it to a Severe Tropical Storm. [8] On November 20, Adjali turned west until reached the northern tip of Madagascar on November 23 and rapidly dissipated.[ citation needed ]

Diego Garcia British atoll in the Indian Ocean

Diego Garcia is an atoll just south of the equator in the central Indian Ocean, and the largest of 60 small islands comprising the Chagos Archipelago. It was first discovered by Europeans and named by the Portuguese, settled by the French in the 1790s and transferred to British rule after the Napoleonic Wars. It was one of the "Dependencies" of the British Colony of Mauritius until it was detached for inclusion in the newly created British Indian Ocean Territory (BIOT) in 1965.

Tropical Depression 02

Tropical depression (MFR)
Tropical storm (SSHWS)
02R 2014-11-28 0610Z.jpg   02R 2014 track.png
DurationNovember 24 – November 30
Peak intensity60 km/h (35 mph) (10-min)  997  hPa  (mbar)

During November 25, RSMC La Reunion reported that Tropical Disturbance 2, had developed within a marginal environment for further development to the northeast of the Mascarene islands. [9] During that day despite having a low-level circulation centre that was located to the east of the deepest atmospheric convection, the system developed into a tropical depression. The depression continued to intensified as it was classified as a tropical storm by the JTWC early on November 28. The next day, the system moved in a southwestward direction and cooler waters. With this, the MFR downgraded it to a tropical disturbance again on November 29, with the JTWC downgrading it to a tropical depression.[ citation needed ]

Intense Tropical Cyclone Kate

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)
Kate Dec 30 2014 0430Z.jpg   Kate 2014 track.png
DurationDecember 30 (Entered basin) – December 31
Peak intensity165 km/h (105 mph) (10-min)  950  hPa  (mbar)

During December 30, Severe Tropical Cyclone Kate moved into the basin from the Australian region, where it was immediately classified as an intense tropical cyclone with 10-minute sustained wind speeds of 175 km/h (110 mph) by RSMC La Reunion. [10] [11] Over the next day the system rapidly weakened into a tropical storm as it moved into an unfavourable environment for development, before RSMC La Reunion and the JTWC issued their final advisories on the system during December 31.[ citation needed ]

Very Intense Tropical Cyclone Bansi

Very intense tropical cyclone (MFR)
Category 5 tropical cyclone (SSHWS)
Bansi 2015-01-13 0625Z.jpg   Bansi 2015 track.png
DurationJanuary 10 – January 18
Peak intensity220 km/h (140 mph) (10-min)  910  hPa  (mbar)

On January 9, the MFR upgraded a low-pressure system east of Madagascar to a zone of disturbed weather, and the system became a tropical disturbance late on the next day. [12] [13] On January 11, the MFR upgraded the system to a tropical depression. Later that day, it intensified into a moderate tropical storm, receiving the name Bansi, whilst the JTWC upgraded it to a tropical storm. In the next day, the MFR upgraded Bansi to a tropical cyclone, as the system formed a ragged eye. [14] [15] [16] On January 13, Bansi explosively intensified into a Category 5 cyclone. However, it soon weakened to a Category 2 on the SSHWS (intense tropical cyclone for MFR) due to an eyewall replacement cycle.[ citation needed ]

Madagascar island nation off the coast of Southeast Africa, in the Indian Ocean

Madagascar, officially the Republic of Madagascar, and previously known as the Malagasy Republic, is an island country in the Indian Ocean, approximately 400 kilometres off the coast of East Africa. The nation comprises the island of Madagascar and numerous smaller peripheral islands. Following the prehistoric breakup of the supercontinent Gondwana, Madagascar split from the Indian subcontinent around 88 million years ago, allowing native plants and animals to evolve in relative isolation. Consequently, Madagascar is a biodiversity hotspot; over 90% of its wildlife is found nowhere else on Earth. The island's diverse ecosystems and unique wildlife are threatened by the encroachment of the rapidly growing human population and other environmental threats.

Eye (cyclone) region of mostly calm weather at the center of strong tropical cyclones

The eye is a region of mostly calm weather at the center of strong tropical cyclones. The eye of a storm is a roughly circular area, typically 30–65 km (20–40 miles) in diameter. It is surrounded by the eyewall, a ring of towering thunderstorms where the most severe weather and highest winds occur. The cyclone's lowest barometric pressure occurs in the eye and can be as much as 15 percent lower than the pressure outside the storm.

It re-intensified slowly to a Category 4 on the SSHWS as it moved East-Southeast until January 13. Then it slowly curved Southeast and impacted Rodrigues on January 14.[ citation needed ] Approximately 90 percent of the island was left without power as a result of the storm. Some flooding occurred and 115 people sought refuge in shelters. [17] From this moment onwards it started weakening gradually at first, but then deteriorated quickly. [18] On January 16, Bansi began to undergo an extratropical transition. Consequently, the MFR and JTWC issued Bansi's final warning, as Bansi was absorbed by an extratropical cyclone to the northeast.[ citation needed ]

Severe Tropical Storm Chedza

Severe tropical storm (MFR)
Tropical storm (SSHWS)
Chedza Jan 16 2015 0655Z.jpg   Chedza 2015 track.png
DurationJanuary 14 – January 19
Peak intensity105 km/h (65 mph) (10-min)  975  hPa  (mbar)

On January 11, the JTWC started to monitor a weak tropical disturbance inland over Mozambique. On January 14, the MFR upgraded a low-pressure system east of Mozambique to a zone of disturbed weather, and the system became a tropical disturbance late on the same day. On January 15, the MFR upgraded the system to a tropical depression. Later next day, it intensified into a moderate tropical storm, receiving the name Chedza, whilst the JTWC upgraded it to a tropical storm. On the same day, MFR upgraded it to a Severe Tropical Storm. Later that day, it made landfall over Madagascar. On January 17, it left Madagascar and went to the South-West Indian Ocean. On the next day, it re-intensified to a Severe Tropical Storm. On January 19, Chedza began to undergo an extratropical transition. Consequently, the MFR issued Chedza's final warning.[ citation needed ]

The formative stages of Chedza brought rainfall to an already flooded region across southeastern Africa. [19] Weeks of heavy rainfall killed 117 people in Mozambique and 104 in neighboring Malawi, where it was the worst floods in 24 years. [20] [21] [22] In Madagascar, Chedza struck after weeks of heavy rainfall, [23] causing rivers to increase and flooding widespread areas of crop fields. [24] [25] In the capital city of Antananarivo, the deluge damaged the main water pump that controlled water levels in the region. [26] The rainfall caused mudslides and damaged roads. [24] [27] Across the country, flooding from Chedza displaced 54,792 people, after destroying 4,430 houses and flooding another 3,442, mostly in Vatovavy-Fitovinany in the southeastern portion. [24] Chedza killed 80 people and caused about $40 million in damage (2015  USD). [19] [20] Later, the storm brought heavy rainfall and strong winds to the mountainous peaks of Réunion. [28]

Moderate Tropical Storm Diamondra

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
Diamondra 2015-01-28 0830Z.jpg   Diamondra 2015 track.png
DurationJanuary 26 – January 30
Peak intensity85 km/h (50 mph) (10-min)  986  hPa  (mbar)

On January 26, a tropical low formed east-southeast of Diego Garcia. It slowly moved towards it, before the MFR upgraded the low into a zone of disturbed weather. Later that day, the area of disturbed weather intensified into a depression, as the MFR and JTWC issued their initial advisories, and designated it as 08S. On January 27, MFR reported that Tropical Depression 08S intensified into a moderate tropical storm, and so was issued the name Diamondra. Later that day, Diamondra continued to strengthen, and late on January 28, Diamondra reached moderate tropical storm intensity. Diamondra weakened, after moving over cooler waters. Late on January 29, Diamondra continued to weaken, so JTWC issued Diamondra's final warning. On January 30, Diamondra began to undergo an extratropical transition. Two days later, it was reported that Diamondra had become extratropical, and MFR announced their final advisory on the system soon after.[ citation needed ]

Very Intense Tropical Cyclone Eunice

Very intense tropical cyclone (MFR)
Category 5 tropical cyclone (SSHWS)
Eunice 2015-01-30 0530Z.jpg   Eunice 2015 track.png
DurationJanuary 27 – February 1
Peak intensity230 km/h (145 mph) (10-min)  915  hPa  (mbar)

On January 27, RSMC La Reunion reported that Tropical Disturbance 08, had developed to the northeast of Mauritius. [29] Later that day, the JTWC issued its initial warnings and designated it as 09S. On January 28, MFR reported that Tropical Depression 09S intensified into a moderate tropical storm, as MFR named it Eunice. Then Eunice moved from north to southeast, before Eunice intensified into a severe tropical storm, according to MFR. The JTWC upgraded Eunice into a Category 2 tropical cyclone, while the MFR upgraded Eunice to a tropical cyclone. After a period of rapid intensification, Eunice was classified as a very intense tropical cyclone by the MFR and a Category 5-equivalent tropical cyclone by the JTWC. The next day, Eunice weakened to an intense tropical cyclone as it underwent an eyewall replacement cycle. On February 2, Eunice began to undergo an extratropical transition. One day later, MFR announced their final advisory on the system.[ citation needed ]

Severe Tropical Storm Fundi

Severe tropical storm (MFR)
Tropical storm (SSHWS)
Fundi Feb 7 2015 1045Z.jpg   Fundi 2015 track.png
DurationFebruary 5 – February 8
Peak intensity100 km/h (65 mph) (10-min)  978  hPa  (mbar)

Similar to the formation of Chedza, a weak tropical disturbance developed near shore over southern Mozambique on February 4. On February 5, the MFR upgraded a low-pressure system east of Mozambique to a zone of disturbed weather. On February 6, the MFR upgraded the system to a tropical depression. Later same day, it intensified into a moderate tropical storm, receiving the name Fundi, whilst the JTWC upgraded it to a tropical storm. Fundi weakened, after moving over cooler waters. Late on February 8, Fundi continued to weaken, so JTWC issued Fundi's final warning. On February 9, Fundi began to undergo an extratropical transition. Same day later, it was reported that Fundi had become extratropical, and MFR announced their final advisory on the system soon after.[ citation needed ]

While in its formative stages, the storm brought rainfall to southwestern Madagascar, totaling 109 mm (4.3 in) in Tulear. [20] Severe floods impacted the city of Toliara, killing five people and affecting 1,200 homes. [30] The effects of Fundi in Madagascar worsened the situation in areas still recovering from Severe Tropical Storm Chedza the previous month. [31]

Severe Tropical Storm Glenda

Severe tropical storm (MFR)
Tropical storm (SSHWS)
Glenda Feb 25 2015 0855Z.jpg   Glenda 2015 track.png
DurationFebruary 22 – February 28
Peak intensity95 km/h (60 mph) (10-min)  974  hPa  (mbar)

On February 22, a tropical low formed on open seas of the Indian Ocean east of Diego Garcia. It moved westwards, before the MFR upgraded it into a zone of disturbed weather. Then it got upgraded into Tropical Disturbance 10 later.[ citation needed ] The disturbance continued to move in a westerly direction as the JTWC issued a tropical cyclone formation alert on the system. [32] On February 24, the system gradually intensified into a tropical depression, whilst the JTWC upgraded it into a tropical storm. However, the MFR upgraded the depression into a moderate tropical storm, which was then named Glenda. It intensified slightly because of favourable conditions for further development, within moderate vertical wind shear. On February 25, the storm continued to intensify, and it reached peak intensity. It quickly weakened the next day, and continued to weaken on February 28, and it lost its energy on March 1, so MFR announced their final advisory on the system soon after.[ citation needed ]

Tropical Depression 11

Tropical depression (MFR)
Tropical storm (SSHWS)
11R Mar 06 2015 0740Z.jpg   15S 2015 track.png
DurationMarch 4 – March 7
Peak intensity55 km/h (35 mph) (10-min)  998  hPa  (mbar)

On March 5, the JTWC started issuing advisories on a tropical system over the Mozambique Channel and was designated as 15S. The next day, RSMC La Reunion reported that it had intensified into Tropical Depression 11. On March 7, the system moved in a westward direction and near shore. With this, the MFR downgraded it to a tropical disturbance again on the same day, with the JTWC downgrading it to a tropical depression and issued its final warning. It continued to weaken on the next day, so MFR announced their final advisory on the system soon after.[ citation needed ]

Moderate Tropical Storm Haliba

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
Haliba Mar 09 2015 0630Z.jpg   Haliba 2015 track.png
DurationMarch 7 – March 10
Peak intensity85 km/h (50 mph) (10-min)  993  hPa  (mbar)

On March 7, a tropical disturbance formed east of Madagascar. It intensified into a zone of disturbed weather and became a tropical disturbance. It became Tropical Depression 12 by MFR, within the JTWC's designation 16S on March 8, and became Moderate Tropical Storm Haliba. The next day, Haliba continued to intensify.[ citation needed ]

During the early stages of Haliba's development it produced heavy rains across eastern Madagascar, resulting in severe flooding. A total of 26 people lost their lives on the island while approximately 96,000 people were affected, 39,000 of whom were rendered homeless. Roughly 13,000 hectares (32,000 acres) of rice fields were destroyed. [33] Torrential rains also affected Mauritius for three days, leading to damaging floods. [34] A 24‑hour rainfall of 135.6 mm (5.34 in) was observed at Ganga Talao. [35] While passing near Réunion, the cyclone produced torrential rain over the northern areas of the island. Total accumulations peaked at 796 mm (31.3 in) in Salazie. Although heavy, the rains were noted as normal for a tropical cyclone. Wind gusts were not as strong as initially forecast and did not exceed 100 km/h (62 mph); a peak gust of 91 km/h (57 mph) was measured in Bellevue Bras Panon. [36] Agricultural damage in the region amounted to 6 million (US$6.4 million). [37]

Tropical Cyclone Joalane

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)
Joalane 2015-04-08 0930Z.jpg   Joalane 2015 track.png
DurationApril 2 – April 11
Peak intensity140 km/h (85 mph) (10-min)  962  hPa  (mbar)

On April 1, the MFR started to monitor Tropical Disturbance 13 several miles southeast of Diego Garcia. Post-storm analysis determined that it did not develop until April 2. Joalane rapidly intensified into a Tropical Cyclone strength system and reached peak intensity. Afterwards, Joalane kept strength while accelerating southward. Joalane became a remnant low late on April 11.[ citation needed ]

Severe Tropical Storm Ikola

Severe tropical storm (MFR)
Category 1 tropical cyclone (SSHWS)
Ikola 2015-04-05 0720Z.png   Ikola 2015 track.png
DurationApril 5 – April 6 (Exited basin)
Peak intensity105 km/h (65 mph) (10-min)  982  hPa  (mbar)

On April 5, Tropical Depression 14 developed just west of the border of the Australian region basin. Later that day, the JTWC designated it as 21S. Due to a favorable environment, the system strengthened quickly, with MFR upgrading it to a tropical cyclone and was named Ikola as it crossed into the Australian region the next day.[ citation needed ]

Other systems

Early on December 13, Tropical Cyclone Bakung was a category 1 tropical cyclone on the Australian tropical cyclone intensity scale before entering this basin. [38] [39] However, during that day the system's low-level circulation centre became exposed and displaced about 280 km (175 mi) from the deep convection. [38] [40] As a result, TCWC Jakarta and the JTWC issued their final warnings on the system, while RSMC La Reunion declared it to be a remnant low in their first and only warning on the system. [39] [40] [41]

Storm names

Within the South-West Indian Ocean, tropical depressions and subtropical depressions that are judged to have 10-minute sustained windspeeds of 65 km/h, (40 mph) by the Regional Specialized Meteorological Center on La Réunion Island, France (RSMC La Réunion) are usually assigned a name. However, it is the Sub-Regional Tropical Cyclone Advisory Centers in Mauritius and Madagascar who name the systems. The Sub-Regional Tropical Cyclone Advisory Center in Mauritius names the storm should it intensify into a moderate tropical storm between 55°E and 90°E, if the storm should intensify into a moderate tropical storm between 30°E and 55°E then the Sub-Regional Tropical Cyclone Advisory Center in Madagascar assigns the appropriate name to the storm. New name lists are used every year, while a name is normally only used once so there are currently no names are retired. [42]

Of note is the presence of the name Nathan in this list. This is unrelated to Cyclone Nathan which coincidentally formed during the same cyclone season in the neighbouring Australian region.

  • Adjali
  • Bansi
  • Chedza
  • Diamondra
  • Eunice
  • Fundi
  • Glenda
  • Haliba
  • Ikola
  • Joalane
  • Kesha (unused)
  • Lugenda (unused)
  • Mahara (unused)
  • Nathan (unused)
  • Oscar (unused)
  • Puleng (unused)
  • Quenelle (unused)
  • Rosaline (unused)
  • Sitara (unused)
  • Tarik (unused)
  • Umali (unused)
  • Vuntu (unused)
  • Wezi (unused)
  • Xolani (unused)
  • Yolande (unused)
  • Zita (unused)

Seasonal effects

This table lists all of the tropical cyclones and subtropical cyclones that were monitored during the 2014–2015 South-West Indian Ocean cyclone season. Information on their intensity, duration, name, areas affected, primarily comes from RSMC La Réunion. Death and damage reports come from either press reports or the relevant national disaster management agency while the damage totals are given in 2014 or 2015 USD.

NameDates active Peak classification Sustained
wind speeds
PressureAreas affectedDamage
(USD)
DeathsRefs
AdjaliNovember 15 – 21Severe tropical storm110 km/h (70 mph)987 hPa (29.15 inHg)NoneNoneNone
02November 24 – 30Tropical depression55 km/h (35 mph)997 hPa (29.44 inHg)Diego Garcia, Mauritius, RodriguesNoneNone
BakungDecember 13Remnant low35 km/h (25 mph)1004 hPa (29.65 inHg)NoneNoneNone
KateDecember 30 – 31Intense tropical cyclone165 km/h (105 mph)950 hPa (28.05 inHg)NoneNoneNone
BansiJanuary 10 – 18Very intense tropical cyclone220 km/h (140 mph)910 hPa (26.87 inHg)Mascarene IslandsMinimalNone
Chedza January 14 – 19Severe tropical storm100 km/h (65 mph)975 hPa (28.79 inHg)Zimbabwe, Malawi, Mozambique, Madagascar, Réunion$40 million80 [43] [44]
DiamondraJanuary 26 – 30Moderate tropical storm85 km/h (50 mph)986 hPa (29.12 inHg)NoneNoneNone
EuniceJanuary 26 – February 1Very intense tropical cyclone230 km/h (145 mph)915 hPa (27.02 inHg)NoneNoneNone
FundiFebruary 5 – 8Severe tropical storm100 km/h (65 mph)978 hPa (28.88 inHg)MadagascarUnknown5
GlendaFebruary 22 – 28Severe tropical storm95 km/h (60 mph)974 hPa (28.76 inHg)NoneNoneNone
11March 4 – 7Tropical depression55 km/h (35 mph)998 hPa (29.47 inHg)Mozambique, MadagascarNoneNone
HalibaMarch 7 – 10Moderate tropical storm85 km/h (50 mph)993 hPa (29.32 inHg)Madagascar, Réunion, Mauritius$6.4 million26
JoalaneApril 2 – 11Tropical cyclone140 km/h (85 mph)962 hPa (28.41 inHg)NoneNoneNone
IkolaApril 5 – 6Severe tropical storm105 km/h (65 mph)982 hPa (29.00 inHg)NoneNoneNone
Season aggregates
14 systemsNovember 16 – April 11230 km/h (145 mph)910 hPa (26.87 inHg)$46.4 million111

See also

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The 2001–02 South-West Indian Ocean cyclone season had the earliest named storm since 1992. Many storms formed in the north-east portion of the basin, and several more originated around Australia. The basin is defined as the waters of the Indian Ocean west of longitude 90°E to the coast of Africa and south of the equator. Eleven tropical storms formed, compared to an average of nine. Tropical systems were present during 73 days, which was significantly higher than the average of 58 for this basin.

2000–01 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 2000–01 South-West Indian Ocean cyclone season was a fairly quiet season with only five named storms, although there was an additional unnamed tropical storm and two subtropical cyclones with gale-force winds. It started early, with a tropical disturbance forming on August 1 – the first day of the cyclone year. However, the first named storm, Ando, was not named until January 2, which at the time was the 4th latest on record. Ando would become the most intense cyclone of the year, reaching peak winds of 195 km/h (120 mph) according to the Météo-France office (MFR) on Réunion, the official Regional Specialized Meteorological Center for the basin. The agency tracked storms south of the Equator and west of 90°E to the east coast of Africa.

Cyclone Gamede South-West Indian cyclone in 2007

Cyclone Gamede was among the wettest tropical cyclones on record, dropping more than 5.5 m (18 ft) of rain in a nine-day period on Réunion island in the southwest Indian Ocean. Only Cyclone Hyacinthe has a higher recorded rainfall total. The seventh named storm of the 2006–07 South-West Indian Ocean cyclone season, Gamede formed south of Diego Garcia on February 19 as a tropical disturbance. It tracked generally westward and steadily intensified, reaching tropical cyclone status on February 23. For two days, Gamede stalled northwest of the Mascarene Islands as an intense tropical cyclone, during which it reached 10 minute maximum sustained winds of winds of 165 km/h (105 mph), according to the Météo-France meteorological office in Réunion. The American-based Joint Typhoon Warning Center (JTWC) estimated peak 1 minute winds of 195 km/h (120 mph), equivalent to a Category 3 on the Saffir-Simpson scale. For four days, Gamede remained within 400 km (250 mi) of Réunion before accelerating southward. On March 2, Gamede transitioned into an extratropical cyclone to the southeast of Madagascar. The MFR tracked the storm for four more days.

2008–09 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 2008–09 South-West Indian Ocean cyclone season was a slightly above average event in tropical cyclone formation. It began on November 15, 2008, and officially ended on April 30, 2009, with the exception for Mauritius and the Seychelles, for which it ended on May 15, 2009. These dates conventionally delimit the period of each year when most tropical cyclones form in the basin, which is west of 90°E and south of the Equator. Tropical cyclones in this basin were monitored by the Regional Specialised Meteorological Centre in Réunion.

1996–97 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 1996–97 South-West Indian Ocean cyclone season was the longest on record, with both an unusually early start and unusually late ending. Most activity was from November through February. According to the Météo-France office (MFR) at Réunion, there were 21 tropical disturbances, 14 of which intensified into tropical depressions. There were 12 named storms, beginning with Antoinette and proceeding sequentially until Lisette. In addition, the Joint Typhoon Warning Center also warned on storms in the region, which identified five other tropical storms. Five of the storms attained tropical cyclone status, or with 10–minute maximum sustained winds of at least 120 km/h (75 mph); of these, three strengthened further into intense tropical cyclones, with Daniella and Helinda tied for strongest storm of the season.

2009–10 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 2009–10 South-West Indian Ocean tropical cyclone year was a near average event in tropical cyclone formation. the season officially started on July 1, 2009, and ended on June 30, 2010, after incorporating the tropical cyclone season which ran from November 1 to April 30 for all areas except for Mauritius and the Seychelles, for which it ended on May 15, 2010. In this basin which officially runs from 30 to 90E and is to the south of the equator, the main warning center is the Regional Specialized Meteorological Center on La Reunion Island; however they delegate the naming of Cyclones to the Meteorological services of Mauritius and Madagascar.

2010–11 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 2010–11 South-West Indian Ocean cyclone season was the least active cyclone season on record in the basin, tied with 1982–83, producing only four systems of gale intensity. This was due to cooler than normal water temperatures and the Walker circulation – a broad atmospheric circulation – causing unusually moist conditions in the eastern Indian Ocean and unusually dry conditions in the western Indian Ocean. The basin includes the waters of the ocean south of the equator and west of 90º E to the eastern coast of Africa.

2011–12 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 2011–12 South-West Indian Ocean cyclone season was a slightly above average event in tropical cyclone formation. It began on November 15, 2011, and ended on April 30, 2012, with the exception for Mauritius and the Seychelles, for which it ended on May 15, 2012. These dates conventionally delimit the period of each year when most tropical cyclones form in the region; however, Severe Tropical Storm Kuena developed in early June after the season had officially ended. The basin is defined as the area west of 90°E and south of the Equator in the Indian Ocean, which includes the waters around Madagascar westward to the east coast of Africa. Tropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion.

1984–85 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 1984–85 South-West Indian Ocean cyclone season was an average cyclone season. Tropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion. The first storm formed in mid-November, though it was not officially named. A few days later, the first official storm of the year (Anety) formed. In December, one storm formed. During January 1985, two tropical cyclones formed towards the end of the month. Three more systems developed in a short period of time in early to mid-February. After nearly two more months of inactivity, an unusually powerful late season storm developed (Helisaonina) in mid-April, which was the strongest storm of the year. While a number of storms during the season reached severe tropical storm status, only one of those intensified further. Even though two tropical cyclones this year made landfall, no known damage was recorded.

1986–87 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 1986–87 South-West Indian Ocean cyclone season was below average due to an ongoing El Niño and a weak monsoon that suppressed convection and storms. There were only five named storms tracked by the Météo-France office (MFR) on Réunion. The United States-based Joint Typhoon Warning Center (JTWC) followed four other storms in the basin, which is the waters of the Indian Ocean south of the equator and west of 90° E to the coast of Africa. The JTWC tracked a storm on August 1 in the northeastern portion of the basin, unusual for the time of year. The first named storm was Severe Tropical Storm Alinina, which originated from the intertropical convergence zone east of Madagascar in the middle of January. However, there was an unnamed tropical depression that produced heavy rainfall in Réunion and Madagascar, causing two deaths in the latter country.

1993–94 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 1993–94 South-West Indian Ocean cyclone season was the most active since the start of reliable satellite coverage in 1967, with 15 named storms including one named tropical depression. Activity lasted from mid-November, when Moderate Tropical Storm Alexina formed, until mid-April, when Tropical Cyclone Odille became extratropical. Four tropical cyclones – Daisy, Geralda, Litanne, and Nadia – struck eastern Madagascar, of which Geralda was the costliest and deadliest. With gusts as strong as 350 km/h (220 mph) accompanied by heavy rainfall, the cyclone destroyed more than 40,000 homes and left 356,000 people homeless. Geralda killed 231 people and left more than $10 million in damage. Cyclone Nadia was the second deadliest cyclone, having killed 12 people in northern Madagascar and later severely damaging portions of northeastern Mozambique, killing about 240 people and leaving $20 million in damage in the latter country. In February, Cyclone Hollanda struck Mauritius near peak intensity, causing $135 million in damage and two deaths.

2012–13 South-West Indian Ocean cyclone season cyclone season in the South-West Indian ocean

The 2012–13 South-West Indian Ocean cyclone season was a slightly above average event in tropical cyclone formation in the Southern hemisphere tropical cyclone year starting on July 1, 2012, and ending on June 30, 2013. Within this basin, tropical and subtropical disturbances are officially monitored by the Regional Specialised Meteorological Centre on Réunion island, while the Mauritius and Madagascar weather services assign names to significant tropical and subtropical disturbances. The first tropical disturbance of the season developed on October 12 and rapidly developed into the earliest known intense tropical cyclone on record during October 14.

Cyclone Bella

Cyclone Bella was a destructive tropical cyclone that passed near the Mauritius outer island of Rodrigues. The second named storm of the season, Bella originated in the middle of January 1991 from a surge in the monsoon trough to the southwest of Sumatra. For several days, the system remained weak as it moved generally west-southwestward. On January 25, it intensified to tropical storm status, but Bella took three more days to intensify to tropical cyclone status, with 10 minute maximum sustained winds of 120 kilometres per hour. The cyclone attained peak intensity on January 29, officially reaching winds of 155 km/h (100 mph). The Joint Typhoon Warning Center unofficially estimated winds of 240 km/h (150 mph), the highest the agency estimated for any storm in the Southern Hemisphere in the year. Bella later turned to the southeast and weakened, passing about 50 km (30 mi) west of Rodrigues on January 31. The storm turned to the south-southwest and back to the southeast again, becoming extratropical on February 4.

Tropical Storm Chedza

Severe Tropical Storm Chedza was a deadly tropical cyclone that struck Madagascar in January 2015. It formed from the intertropical convergence zone and moved over Mozambique, After moving open waters, the system began organizing on January 14, becoming Tropical Storm Chedza two days later. It quickly intensified over the Mozambique Channel due to warm waters and favorable conditions, and the storm attained peak 10 minute sustained winds of 100 km/h (65 mph) on January 16. That day, Chedza moved ashore western Madagascar between Belo sur Mer and Morondava, and it quickly crossed the island while weakening. The storm briefly re-intensified, passing southwest of Réunion before turning to the southeast. Chedza became extratropical on January 19, and was last noted two days later.

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