Meteorological history | |
---|---|
Formed | 21 April 2019 |
Dissipated | 29 April 2019 |
Intense tropical cyclone | |
10-minute sustained (MFR) | |
Highest winds | 215 km/h (130 mph) |
Highest gusts | 295 km/h (185 mph) |
Lowest pressure | 930 hPa (mbar);27.46 inHg |
Category 4-equivalent tropical cyclone | |
1-minute sustained (SSHWS/JTWC) | |
Highest winds | 230 km/h (145 mph) |
Lowest pressure | 934 hPa (mbar);27.58 inHg |
Overall effects | |
Fatalities | 52 total |
Damage | $345 million (2019 USD) |
Areas affected | Seychelles,Comoros,Mayotte,Madagascar,Mozambique,Tanzania,Malawi |
IBTrACS / [1] | |
Part of the 2018–19 South-West Indian Ocean cyclone season |
Intense Tropical Cyclone Kenneth was the strongest tropical cyclone to make landfall in Mozambique since modern records began. [2] The cyclone also caused significant damage in the Comoro Islands and Tanzania. The fourteenth tropical storm,record-breaking tenth tropical cyclone,and ninth intense tropical cyclone of the 2018–19 South-West Indian Ocean cyclone season,Kenneth formed from a vortex that the Météo-France office on La Réunion (MFR) first mentioned on 17 April. The MFR monitored the system over the next several days,before designating it as Tropical Disturbance 14 on 21 April. The disturbance was located in a favorable environment to the north of Madagascar,which allowed it to strengthen into a tropical depression and later a tropical storm,both on the next day. The storm then began a period of rapid intensification,ultimately peaking as an intense tropical cyclone with 10-minute sustained winds of 215 km/h (134 mph) and a minimum central pressure of 934 hPa (27.58 inHg). At that time,Kenneth began to undergo an eyewall replacement cycle and weakened slightly,before making landfall later that day as an intense tropical cyclone. [2] As a result of land interaction,Kenneth became disorganised as it made landfall and rapidly degenerated thereafter. The storm then shifted southward,with the MFR cancelling all major warnings for inland cities. Kenneth was reclassified as an overland depression after landfall,with the MFR issuing its warning at midnight UTC on 26 April. Thunderstorm activity developed off the coast of Mozambique on 27 April as the system began drifting northward. Kenneth re-emerged off the coast of northern Mozambique on 28 April,before dissipating on the next day.
In the country of Comoros;Kenneth's wind and rainfall caused at least seven deaths. Damage was estimated at US$345 million. [3] Prior to Kenneth's landfall,local authorities evacuated over 30,000 people in the path of the storm in northern Mozambique. [4] Kenneth killed 45 people in Mozambique.
On 17 April, the MFR began monitoring a vortex to the north of Madagascar. [5] The MFR continued to monitor the system over the next several days, noting a significant increase in deep convection on 21 April. [6] On 22 April at 12:00 UTC, the MFR began issuing advisories on the system, designating it as Tropical Disturbance 14. [7] Soon after, the Joint Typhoon Warning Center (JTWC) issued a tropical cyclone formation alert, noting that the disturbance was located in a favorable environment with low vertical wind shear and warm sea surface temperatures of 29–30 °C (84–86 °F). [8] Early on 23 April, the JTWC began issuing warnings on the system, classifying it as Tropical Cyclone 24S. [9] A few hours later, the MFR upgraded the system to a tropical depression while it was moving west, under the influence of a low-to-mid-level ridge located to the south. [10] The MFR upgraded the depression to a moderate tropical storm at 12:00 UTC, assigning the name Kenneth to the storm. At that time, the MFR stated that cloud top temperatures had decreased to −90 °C (−130 °F) and that the overall organization of the system had improved. [11]
Soon after being named, Kenneth began to rapidly intensify, with the JTWC noting that a formative eye feature had developed. [12] Around 00:00 UTC on 24 April, the MFR upgraded the system to a severe tropical storm. [13] A few hours later, the JTWC followed suit, upgrading Kenneth to the equivalent of a Category 1 hurricane on the Saffir–Simpson hurricane wind scale. [14] At 12:00 UTC, Kenneth was upgraded by the MFR into the record-breaking tenth tropical cyclone of the season. At that time, the MFR stated that an eye was attempting to form within the central dense overcast of the storm, and that wind shear was beginning to decrease. [15] Around 18:00 UTC, Kenneth strengthened into the equivalent of a Category 3 major hurricane. At that time, the Hahaya International Airport on the Comoros island of Grand Comore reported winds of 36 knots (67 km/h; 41 mph) while Kenneth was located about 55 km (34 mi) to the north. [16] Six hours later, the MFR upgraded Kenneth to intense tropical cyclone status, noting that the storm had a very cold convective ring and that the core had become more compact. [17] On 25 April, at 06:00 UTC, Kenneth reached peak intensity, with 10-minute sustained winds of 215 km/h (134 mph) and a minimum central pressure of 934 hPa (27.58 inHg). At that time, Kenneth had a pinhole eye surrounded by very strong convection; however, the storm also began to undergo an eyewall replacement cycle. [18] Meanwhile, the JTWC estimated that Kenneth peaked as a Category 4-equivalent tropical cyclone, with 1-minute sustained winds of 230 km/h (140 mph). [19] As Kenneth approached the Mozambique coastline, the system slowly began to weaken due to the eyewall replacement cycle and the frictional effects of land interaction. Later that day, at 13:15 UTC, Kenneth made landfall in Mozambique as an intense tropical cyclone, just north of Pemba, with 1-minute sustained winds of 220 km/h (140 mph), equivalent to a Category 4 hurricane. [20] This made Kenneth the most intense landfalling tropical cyclone in the recorded history of Mozambique. [2] This also marked the second time in Mozambique's recorded history in which two storms have made landfall during the same cyclone season at intense tropical cyclone intensity or higher. [4]
After landfall, Kenneth was re-classified as an overland depression, with 10-minute sustained winds of 155 km/h (96 mph), just below intense tropical cyclone strength. As the storm drifted further inland, it rapidly degenerated. [21] Shortly afterward, the JTWC issued its last warning on the system. Kenneth's central convection had drastically shrunk, with only a small area remaining over land. [22] Despite still being in a favorable atmospheric environment, Kenneth continued to rapidly weaken due to interaction with land. At 00:00 UTC on 26 April, the MFR issued its last warning on Kenneth, reporting 10-minute sustained winds of 65 km/h (40 mph), while the system was located about 110 km (68 mi) inland in Mozambique. [23] Kenneth continued to weaken, with its winds falling below gale force as it continued its southward motion. On 27 April, thunderstorms developed off the coast of Mozambique, although the center of Kenneth remained over land, as the system began drifting northward. [24] On 28 April, Kenneth emerged off the coast of northern Mozambique, but continued to weaken due to unfavorable conditions. Subsequently, Kenneth dissipated by 12:00 UTC on 29 April. [25]
Overall, Kenneth killed at least 52 people and damage is estimated to be at least US$345 million. [3] [26]
In the country of Comoros, Kenneth's winds and rains killed at least seven people and injured more than 200 others. Preliminary estimates state that approximately 60–80% of staple crops were destroyed. [27] Damage was estimated at CF81.7 billion (US$188 million), equivalent to 16% of the country's GDP. [28] [29]
Kenneth struck Mozambique about a month after Cyclone Idai had devastated the northern part of the country, raising fears that the ongoing humanitarian crisis there could be worsened by the storm. [20] [30] Local authorities in northern Mozambique evacuated more than 30,000 people ahead of the storm, given the expected impacts. [4]
Cyclone Kenneth made landfall just north of Pemba, Mozambique on Thursday evening, 25 April, at about 4:15 p.m., local time (12:15 UTC), with 1-minute sustained winds of 220 km/h (140 mph). [2] The IFRC reported widespread damage in the city, with power outages recorded throughout the city and numerous trees felled, which caused even more damage. In Mozambique, a total of 45 people were killed, [31] including a woman who was killed by a falling coconut tree near Pemba. [32] Additionally, four ships sank off the coast of the town of Palma. [33] On Ibo Island, it was reported that 90% of the homes were destroyed. In Cabo Delgado Province, 2,500 homes were destroyed with multiple schools and hospitals also sustaining damage. [34]
After the storm, the European Union released €1.5 million (US$1.7 million) as an immediate assistance for those being affected by the cyclone in Mozambique and Comoros. [35] The United Nations provided an emergency aid of $13 million to Mozambique and Comoros, which can help provide food and water, as well as repair the damaged infrastructure. [36] The storm also resulted in a temporary reduction of violence amid the Islamist insurgency in Mozambique, though rebel attacks resumed in May 2019. [37]
The 2006–07 South-West Indian Ocean cyclone season featured the second-most intense tropical cyclones for a season in the tropical cyclone basin, only behind the 2018–19 season. The basin contains the waters of the Indian Ocean south of the equator and west of 90°E. Météo-France's meteorological office in Réunion (MFR), the official Regional Specialized Meteorological Center for the South-West Indian Ocean, tracked 15 tropical disturbances, of which eleven attained gale-force winds. The season began in October 2006 with a short-lived tropical disturbance, followed by Anita in November, which was the first named storm of the season. Cyclone Bondo was the first of six intense tropical cyclones, which took a rare track through the southern Seychelles before making landfall on northwest Madagascar, killing 11 people. Severe Tropical Storm Clovis lasted from December 2006 to January 2007; it struck eastern Madagascar, killing four people.
The 2004–05 South-West Indian Ocean cyclone season was a near average season, despite beginning unusually early on August 30 with the formation of an early-season tropical depression. Météo-France's meteorological office in Réunion (MFR) ultimately monitored 18 tropical disturbances during the season, of which 15 became tropical depressions. Two storms – Arola and Bento – formed in November, and the latter became the most intense November cyclone on record. Bento attained its peak intensity at a low latitude, and weakened before threatening land. Tropical Cyclone Chambo was the only named storm in December. In January, Severe Tropical Storm Daren and Cyclone Ernest existed simultaneously. The latter storm struck southern Madagascar, and five days later, Moderate Tropical Storm Felapi affected the same area; the two storms killed 78 people and left over 32,000 people homeless. At the end of January, Severe Tropical Storm Gerard existed as an unnamed tropical storm for 18 hours due to discrepancies between warning centers.
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.
Intense Tropical Cyclone Bondo was the first of a series of six tropical cyclones to impact Madagascar during the 2006–07 South-West Indian Ocean cyclone season. Bondo developed on 15 December in the central Indian Ocean, west of Diego Garcia. After strengthening into a moderate tropical storm on 18 December, the storm rapidly intensified while moving westward, taking advantage of favorable atmospheric conditions. Within 18 hours of being named, Bondo intensified to tropical cyclone status, or the equivalent of a minimal hurricane. The Météo-France office on Réunion (MFR) estimated peak 10-minute sustained winds of 205 km/h (125 mph), although the American-based Joint Typhoon Warning Center estimated stronger 1-minute winds of 250 km/h (155 mph). While near peak intensity, Bondo passed just south of Agaléga island, before weakening slightly and moving through the Farquhar Group of islands belonging to the Seychelles, becoming the strongest cyclone to affect that island group in decades. Bondo turned southwestward, and after brushing the northern coast of Madagascar, the cyclone made landfall near Mahajanga on 25 December. The storm continued southward, and was last tracked by the MFR on 28 December.
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.
The 1982–83 South-West Indian Ocean cyclone season was the least active cyclone season in the basin since 1961–1962. There were six systems that were named, although three of them – Arilisy, Clera, and Fely – failed to intensify beyond tropical depression status. No storms reached tropical cyclone status, according to the official warning agency for the basin, Météo-France, although the two strongest storms – Bemany and Elinah – peaked just below that intensity. The first named storm, Arilisy, formed on October 27, and dissipated without having affected land. However, the Joint Typhoon Warning Center (JTWC), which is an unofficial warning center for the basin, briefly tracked a tropical depression in July. The next storm was Bemany, which passed east of Mauritius near peak intensity in early December. Tropical Depression Clera existed briefly in the middle of September, and Tropical Storm Dadafy moved across the eastern portion of the basin in late December.
The 1993–94 South-West Indian Ocean cyclone season was the most active season in the basin since the start of reliable satellite coverage in 1967, until the record was surpassed 25 years later in the 2018–19 South-West Indian Ocean cyclone season. 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 (215 mph) accompanied by heavy rainfall, Geralda destroyed more than 40,000 homes and left 356,000 people homeless. Geralda killed 231 people and caused 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.
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.
Very Intense Tropical Cyclone Hudah was a powerful and destructive tropical cyclone that affected Southeast Africa in April 2000. It was the last in a series of three cyclones that impacted Madagascar during the year. Hudah first developed as a disturbance embedded within the monsoon trough on 22 March, within the Australian region cyclone basin. Moving westward as the result of a strong subtropical ridge to its south, the storm quickly intensified, and reached Category 2 cyclone intensity on 25 March before entering the Southwest Indian cyclone basin. For various reasons that remain unknown, the cyclone was only designated a name by the time it had crossed into the area of responsibility of the Regional Specialized Meteorological Center in Réunion. Nonetheless, Météo-France (MFR) assigned the name Hudah to the cyclone. An eye formed, and the storm intensified into a tropical cyclone on 27 March well to the southeast of Diego Garcia. On 1 April, the MFR upgraded it to a very intense tropical cyclone, estimating peak 10-minute winds of 225 km/h (140 mph). By contrast, the Joint Typhoon Warning Center (JTWC) estimated 1-minute winds of 235 km/h (146 mph). At this time, the MFR estimated the pressure to have been 905 hPa (mbar), making Hudah the most intense tropical cyclone worldwide in 2000. Cyclone Hudah maintained peak winds until making landfall just southeast of Antalaha, Madagascar on 2 April. It weakened greatly over land, but re-attained tropical cyclone status on 5 April after moving over the Mozambique Channel. Hudah reached 10-minute winds of 160 km/h (99 mph) by the time it made landfall on Mozambique near Pebane, Mozambique, on 8 April, and dissipated by the next day.
Very Intense Tropical Cyclone Hellen of March 2014 was one of the most powerful tropical cyclones in the Mozambique Channel on record, as well as the most intense of the 2013–14 South-West Indian Ocean cyclone season. Hellen formed on March 26 in the northern portion of the channel, and the storm brought rainfall to coastal Mozambique while in its formative stages. While moving southeastward, it developed an organized area of convection over the center of circulation. Warm waters allowed Hellen to rapidly intensify while passing south of the Comoros, with a well-defined eye forming in the middle of the thunderstorms. The cyclone attained peak intensity March 30, with maximum sustained winds estimated 230 km/h (145 mph) according to the Regional Specialized Meteorological Center, Météo-France in La Réunion. Subsequently, Hellen weakened quickly due to dry air and land interaction with Madagascar, and the storm's eye dissipated. On March 31, the storm made landfall in northwestern Madagascar as a weakened cyclone, despite previous forecasts for the center to remain over water. By April 1, Hellen was no longer a tropical cyclone after most of the convection dissipated. The remnants turned to the west, moving over Mozambique without redeveloping, later dissipating on April 5.
The 2018–19 South-West Indian Ocean cyclone season was the costliest and the most active season ever recorded. Additionally, it is also the deadliest cyclone season recorded in the South-West Indian Ocean, surpassing the 1891–92 season in which the 1892 Mauritius cyclone devastated the island of Mauritius, and is mainly due to Cyclone Idai. The season was an event of the annual cycle of tropical cyclone and subtropical cyclone formation in the South-West Indian Ocean basin. It officially began on 15 November 2018, and ended on 30 April 2019, except for Mauritius and the Seychelles, which it ended on 15 May 2019. 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.
The 2019–20 South-West Indian Ocean cyclone season was a slightly above-average season in tropical cyclone and subtropical cyclone formation west of 90°E. The season officially began on 15 November, however, the formation of the first system—Zone of Disturbed Weather 01—occurred on 22 July 2019, well before the official start of the season. This was the earliest start to a season since the 2016–17 season. The season then officially ended on 30 April 2020, with the exception of Mauritius and the Seychelles, for which it officially ended on 15 May 2020. 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 Specialized Meteorological Centre in Réunion.
The 2020–21 South-West Indian Ocean cyclone season was an above-average season which produced 12 named storms, with 7 strengthening into tropical cyclones. The season started with the formation of Cyclone Alicia in the extreme northeast section of the basin on 12 November 2020, just before the official start of the season, which marked the third season in a row in which a tropical cyclone formed before the official start of the season. It officially began on 15 November 2020, and ended with the dissipation of Cyclone Jobo on 24 April, 6 days before the official end on 30 April 2021, with the exception of Mauritius and the Seychelles, which officially ended on 15 May 2021. 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 and unofficially by the Joint Typhoon Warning Center.
Severe Tropical Storm Chalane was the first of three consecutive tropical cyclones that struck Mozambique in the 2020-21 South-West Indian Ocean cyclone season. As the fourth tropical depression, third named storm, and second severe tropical storm of the season, Chalane developed out of a zone of disturbed weather which was first monitored RSMC La Réunion on 19 December. Despite conditions slowly becoming unfavorable, the system formed into a tropical depression on 23 December due to the presence of a Kelvin wave and an equatorial Rossby wave, as well as warm sea surface temperatures. The depression soon strengthened into Tropical Storm Chalane on the following day. Chalane made landfall on Madagascar on 26 December and weakened, before emerging into the Mozambique Channel a couple days later. Subsequently, Chalane restrengthened, before making landfall on Mozambique on 30 December. The system weakened as it moved inland, degenerating into a remnant low later that day. However, Chalane's remnants continued moving westward for another several days, emerging into the South Atlantic on 3 January, before dissipating later that day.
The 2021–22 South-West Indian Ocean cyclone season featured the record latest start for the first system to develop. Despite the late start, it was an above-average season that produced 12 named storms, with 5 becoming tropical cyclones. The season began on 15 November 2021, and ended on 30 April 2022, with the exception for Mauritius and the Seychelles, for which it ended on 15 May 2022. 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. However, tropical cyclones that form at any time between 1 July 2021 and 30 June 2022 will count towards the season total. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion and unofficially by the Joint Typhoon Warning Center.
Severe Tropical Storm Ana was a deadly tropical cyclone that affected the African nations of Madagascar, Malawi and Mozambique and was the third-deadliest tropical cyclone in 2022, after the Western Pacific Tropical Storm Megi and Atlantic Hurricane Ian. The first named storm of the 2021–22 South-West Indian Ocean cyclone season, Ana developed from an area of convection that was designated as Invest 93S northeast of Madagascar.
Tropical Cyclone Gombe was a strong tropical cyclone that affected Mozambique. It became the first storm to make a major landfall in Nampula Province in Mozambique since Cyclone Jokwe in 2008. The eighth tropical storm, fourth tropical cyclone and fourth intense tropical cyclone of the 2021–22 South-West Indian Ocean cyclone season, Gombe originated from a tropical disturbance located off the coast of Madagascar. This area of convection was designated by the Joint Typhoon Warning Center as Invest 97S on 6 March. The next day, it began to slowly move westward and executed a loop as it became more organized, which prompted Météo-France Reunion (MFR) to note the system as Zone of Disturbed Weather 09. The system became a depression on 9 March, and became a moderate tropical storm the same day. Soon after being named, Gombe made landfall in Madagascar, and entered in the Mozambique Channel the next day. The storm continued its westward motion while slowly intensifying, and was upgraded to a Tropical Cyclone by the MFR on 10 March. Closing in on Nampula Province, the storm underwent rapid intensification, and was upgraded to the fourth Intense Tropical Cyclone of the year and reached its peak intensity on 11 march, with maximum 10-minute sustained winds of 165 km/h (105 mph), maximum 1-minute sustained winds of 185 km/h (115 mph), and a minimum central pressure of 960 hectopascals (28 inHg). The storm proceeded to make landfall, and quickly lost its convection over land. On 12 March, Gombe degenerated into a remnant low overland. However, the system subsequently turned southeastward and reemerged over water, before briefly regenerating into a tropical depression on 17 March. Gombe dissipated later that day.
The 2022–23 South-West Indian Ocean cyclone season was one of the deadliest South-West Indian cyclone seasons on record, mostly due to Cyclone Freddy. It officially began on 15 November 2022, and ended on 30 April 2023, with the exception for Mauritius and the Seychelles, for which it ended on 15 May 2023. 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. However, tropical cyclones can form year-round, and all tropical cyclones that form between 1 July 2022 and 30 June 2023 will be part of the season. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion and unofficially by the Joint Typhoon Warning Center. The season was average in terms of the number of systems that formed, with nine systems becoming at least moderate tropical storms, and six reaching tropical cyclone strength. Activity began early, with the first two systems developing in September and October, and ended late with Fabien in May.
Tropical Cyclone Cheneso was a strong tropical cyclone that affected Madagascar in January 2023. The fourth tropical storm and fifth tropical cyclone of the 2022–23 South-West Indian Ocean cyclone season, Cheneso developed out of a zone of disturbed weather status which was first monitored at RSMC La Réunion on 17 January. Despite convection wrapping into the curved band pattern, the system formed into a tropical depression on 18 January. The depression strengthened into Severe Tropical Storm Cheneso on the following day. Cheneso made landfall over northern Madagascar and weakened into an inland depression, before emerging into the Mozambique Channel. Cheneso later strengthened into a tropical cyclone on 25 January. The system continued moving southeast, before transitioning into a post–tropical depression on 29 January.
The 2023–24 South-West Indian Ocean cyclone season was an above-average season, including ten named storms, six tropical cyclones and two intense tropical cyclones. Despite its moderate activity, it was the least deadly and destructive season in three years. It is the current event of the annual cycle of tropical and subtropical cyclogenesis. It began on 15 November 2023, and ended on 30 April 2024, with the exception for Mauritius and the Seychelles, where it ended on 15 May 2024. 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. However, tropical cyclones can form year-round, and all tropical cyclones that formed between 1 July 2023 and 30 June 2024 would be part of the season. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion and unofficially by the Joint Typhoon Warning Center.
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