Meteorological history | |
---|---|
Formed | 15 December 2006 |
Dissipated | 28 December 2006 |
Intense tropical cyclone | |
10-minute sustained (MFR) | |
Highest winds | 205 km/h (125 mph) |
Highest gusts | 285 km/h (180 mph) |
Lowest pressure | 930 hPa (mbar);27.46 inHg |
Category 4-equivalent tropical cyclone | |
1-minute sustained (SSHWS/JTWC) | |
Highest winds | 250 km/h (155 mph) |
Lowest pressure | 904 hPa (mbar);26.70 inHg |
Overall effects | |
Fatalities | 11 direct,1 missing |
Areas affected | |
IBTrACS | |
Part of the 2006–07 South-West Indian Ocean cyclone season |
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.
Due to its small size,Bondo's winds did not exceed 100 km/h (62 mph) on Agaléga,despite passing close by near peak intensity. In the Seychelles,Bondo severely damaged buildings and vegetation on Providence Atoll. High waves caused flooding elsewhere in the archipelago. In Madagascar,Bondo killed 11 people when it struck the island's west coast. The storm's high winds,reaching 155 km/h (96 mph) in Mahajanga,damaged buildings and left around 20,000 people homeless.
An area of convection, or thunderstorms, persisted west of Diego Garcia in the central Indian Ocean on 15 December. That day, the Météo-France meteorological office in Réunion (MFR) [nb 1] classified the weather disturbance as Tropical Disturbance 3. Over the next two days, the disturbance became more organized, with increasing convection over the center. This was due to the system moving into an area of lower wind shear. On 18 December, the MFR upgraded the system to Moderate Tropical Storm Bondo. On the same day, the Joint Typhoon Warning Center (JTWC) [nb 2] began issuing advisories on Bondo, designating it Tropical Cyclone 05S. [2] [3] [4]
Steered by a ridge to the south, Bondo moved westward into an area conducive for strengthening, including low wind shear, warm waters of around 29 °C (84 °F), and favorable outflow. Within 18 hours of being named, Bondo intensified to tropical cyclone status, or the equivalent of a minimal hurricane, and continued to rapidly intensify. Late on 19 December, the JTWC estimated peak 1-minute winds of 250 km/h (155 mph). Early on 20 December, the MFR estimated peak 10-minute winds of 205 km/h (125 mph), making Bondo an intense tropical cyclone. At 02:30 UTC that day, Bondo passed about 20 km (12 mi) south of Agaléga, one of the Outer Islands of Mauritius. Despite the close approach at peak intensity, the cyclone's small size spared the strongest winds from affecting the island. [2] [3] [5]
Increasing wind shear and an eyewall replacement cycle caused Bondo to weaken, beginning on 20 December. On the same day, the track shifted to the west-northwest. [3] [5] On 21 December, Bondo passed over Providence Atoll and Farquhar Atoll, part of the Outer Islands of Seychelles. It was the most intense tropical cyclone in several decades to strike that part of the Seychelles. [6] On 22 December, Bondo weakened to a moderate tropical storm as its track shifted to the southwest. The storm re-intensified due to warmer waters, regaining tropical cyclone intensity late on 23 December near the northern tip of Madagascar. On the next day, the JTWC estimated a secondary peak intensity of 215 km/h (135 mph), while the MFR estimated a secondary peak of 140 km/h (85 mph). Land interaction and drier air caused the storm to weaken slightly. Around 12:00 UTC on 25 December, Bondo made landfall in northwestern Madagascar near Mahajanga as a severe tropical storm. The storm weakened to a tropical disturbance while continuing southward through the country. On 26 December, Bondo emerged into the Mozambique Channel. The MFR continued tracking the disturbance for two more days, by which point Bondo was located off the southwest coast of Madagascar. [2] [3] [5]
Cyclone Bondo first affected the small island of Agaléga. The Mauritius Meteorological Service warned for the potential of storm surge, high winds, and heavy rainfall. While passing nearby, wind gusts did not exceed 100 km/h (62 mph). However, rainfall from the storm occurred on Agaléga, reaching about 287 mm (11.3 in) over 24 hours. [5]
Due to its proximity to the equator, the Farquhar Atoll is rarely affected by tropical cyclones. [5] Bondo was the first cyclone to affect Farquhar since Tropical Storm Honorine in 1974. [7] The MFR described Bondo as "shaking the immemorial peacefulness of the islets of the Farquhar Archipelago and wreaking havoc on the northernmost ones." [8] On 21 December, officials in Seychelles evacuated 35 of its 43 residents. The remaining eight stayed on Providence Atoll in a concrete bunker, unable to be evacuated due to limited time and resources. [9] [6] Bondo destroyed most of the buildings and about 60% of the coconut trees on Providence, decimating the island's copra industry. The island's human population was evacuated following the storm and not returned, due to the inability for emergency evacuations. [10] The storm killed native pigs, birds, hens, and cats on Providence, while also wrecking vegetation. [11] The cyclone also produced 1.8 m (5.9 ft) tides higher than normal in the Inner Islands of Seychelles, along with 3 m (9.8 ft) waves. Rough seas caused flooding, beach erosion, and coastal damage on Mahé, Praslin, and La Digue. One person was injured on Mahé. [6]
In northern Madagascar, Cyclone Bondo produced gusty winds and heavy rainfall. Eleven people were killed as a result of Bondo and another was reported as missing. A total of 20,001 people were left homeless. [12] One of the fatalities took place in Mahajanga after a wall collapsed on a man. Another fatality occurred offshore after a man went missing while taking his family canoeing. Roughly 300 people were affected in the city of Mahajanga alone. [13] The city recorded 179 mm (7.0 in) of rainfall in 24 hours, as well as peak wind gusts of 155 km/h (96 mph). [8] Bondo knocked out the power, water, and phone service in Mahajanga, [14] hampering rescue efforts. [15]
In the Seychelles, officials reinforced buildings to withstand future storm damage, following Cyclone Bondo. The improvements failed to withstand the winds from a stronger storm, Cyclone Fantala, which affected the same group of islands in 2016. [16]
In conjunction with the International Red Cross, rescue teams in Madagascar were deployed to the hardest hit regions on 27 December. These teams traveled by road to the region while a third team was set to arrive by helicopter several days later. [15] Bondo was the first in a series of six storms to affect Madagascar in the 2006-07 season, followed by Severe Tropical Storm Clovis, which struck southeastern Madagascar in January; Cyclones Favio and Gamede, which brushed the island in February, Indlala in March, and Jaya in April. [17] In late-February, 2007, the Government of Norway provided $800,000 in relief funds for the combined effects of Cyclones Bondo, Favio and Clovis. [18] On 15 March, the United Nations announced a funding program after three other storms had struck Madagascar. The goal was to provide roughly $9 million to about 300,000 of the millions of affected population. However, upon the announcement, only $3 million of this fund had been allocated. [19] Following the widespread damage from Cyclone Indlala in March, 2007, the Government of Madagascar launched an appeal to the United Nations for $246 million in relief funds for damage wrought by all five cyclones. [20] The appeal ultimately raised 76% of its target, which was spent on food, shelter, and other emergency items. [21]
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 2003–04 South-West Indian Ocean cyclone season featured the most intense tropical cyclone in the South-West Indian Ocean, Cyclone Gafilo, as well as nine other named storms. Tropical activity began on September 28 when Moderate Tropical Storm Abaimba formed at a low latitude. Activity continued until late May, following Severe Tropical Storm Juba, which marked the third year in a row that a storm formed in May. The final disturbance, one of sixteen, dissipated on May 24. Activity was near average, and the season was one of the longest on record.
The 2002–03 South-West Indian Ocean cyclone season was one of the longest lasting and the third-most active season in the South-West Indian Ocean. Storms during the season impacted the Mascarene Islands, Seychelles, Madagascar, and countries in south-eastern Africa. The season began early when an unnamed tropical storm struck Seychelles in September, becoming the most damaging storm there in 50 years. The next system, Atang, was the first named storm of the season, but was only a tropical depression; it was named due to the threat to an outer island of Mauritius. Atang later struck Tanzania in a climatologically unusual area in November, resulting in unconfirmed deaths of fishermen. The first named storm to reach tropical storm intensity was Boura, which brushed the Mascarene Islands with gusty winds and rainfall. In December, Cyclone Crystal threatened to strike Mauritius but instead veered eastward, and later, Tropical Storm Delfina lasted from late December through early January 2003. Delfina damaged or destroyed thousands of houses in Mozambique and Malawi, killing 54 people.
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.
Tropical Cyclone Elita was an unusual tropical cyclone that made landfall on Madagascar three times. The fifth named storm of the 2003–04 South-West Indian Ocean cyclone season, Elita developed in the Mozambique Channel on January 24, 2004. It strengthened to tropical cyclone status before striking northwestern Madagascar on January 28; it was the first storm to strike western Madagascar at that intensity since Cyclone Cynthia in 1991. Elita weakened to tropical depression status while crossing the island, and after exiting into the southwest Indian Ocean, it turned to the west and moved ashore in eastern Madagascar on January 31. After once again crossing the island, the cyclone reached the Mozambique Channel and re-intensified. Elita turned to the southeast to make its final landfall on February 3 along southwestern Madagascar. Two days later, it underwent an extratropical transition; subsequently, the remnant system moved erratically before dissipating on February 13.
Intense Tropical Cyclone Indlala was a powerful tropical cyclone that struck northeastern Madagascar in March 2007. The ninth named storm and fifth intense tropical cyclone of the 2006–07 South-West Indian Ocean cyclone season, Indlala developed on 3 March 2007 southwest of the Chagos archipelago in the central Indian Ocean. Initially a tropical disturbance, Indlala moved generally westward in its formative stages, attaining tropical cyclone status on 13 March. A day later, the Météo-France office on Réunion (MFR) estimated peak 10–minute sustained winds of 175 km/h (110 mph), although the American-based Joint Typhoon Warning Center estimated stronger 1–minute winds of 220 km/h (135 mph). Early on 15 March, the cyclone made landfall in northeastern Madagascar on the Masoala Peninsula near Antalaha, still at its peak intensity according to the MFR. Indlala rapidly weakened over land and turned southward, eventually re-emerging into the Indian Ocean on 18 March; it was last noted by the MFR on 19 March.
Intense Tropical 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. 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 (MFR). 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.
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.
The 1991–92 South-West Indian Ocean cyclone season was an average cyclone season in which most storms remained over open waters. At the time, the season's official bounds lasted from November 15, 1991, to April 30, 1992, although this season began early when three tropical depressions formed before the official start. The second, designated Tropical Depression A2 by the Météo-France office (MFR) on Réunion, passed north of Madagascar on October 16 before weakening.
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 1989–90 South-West Indian Ocean cyclone season was an average cyclone season, with nine named storms and five tropical cyclones – a storm attaining maximum sustained winds of at least 120 km/h (75 mph). The season officially ran from November 1, 1989, to April 30, 1990. Storms were officially tracked by the Météo-France office (MFR) on Réunion while the Joint Typhoon Warning Center (JTWC) in an unofficial basis. The first storm, Cyclone Alibera, was the second longest-lasting tropical cyclone on record in the basin, with a duration of 22 days. Alibera meandered and changed directions several times before striking southeastern Madagascar on January 1, 1989, where it was considered the worst storm since 1925. The cyclone killed 46 people and left widespread damage. Only the final storm of the year – Severe Tropical Storm Ikonjo – also had significant impact on land, when it left $1.5 million in damage (1990 USD) in the Seychelles.
The 1987–88 South-West Indian Ocean cyclone season was a moderately active cyclone season, with nine named storms. Four of the storms attained tropical cyclone status, which is the equivalent of a minimal hurricane with 10 minute sustained winds of at least 120 km/h (75 mph). The seasonal activity was evenly dispersed, officially beginning on December 9 when the Météo-France office (MFR) on Réunion started tracking Tropical Storm Ariny. The storm crossed 90° E from the adjacent Australian basin, one of two storms in the season to do so along with Cyclone Ezenina. There were also two storms tracked unofficially by the Joint Typhoon Warning Center (JTWC) in November.
The 1985–86 South-West Indian Ocean cyclone season was the first in which the Météo-France office (MFR) on Réunion tracked cyclones as far east as 90° E in Indian Ocean, south of the equator. Previously, the agency's area of responsibility was limited to 80° E. It was an active season with twelve named storms, of which five strengthened into tropical cyclone with 10 minute sustained winds of at least 120 km/h (75 mph). The first named storm was Tropical Storm Alifredy, which originated in the Mozambique Channel in late December and moved across Madagascar. However, the unofficial Joint Typhoon Warning Center (JTWC) tracked a short-lived storm in September.
The 1994–95 South-West Indian Ocean cyclone season was fairly active, with storms forming regularly from October through April. It was much less damaging than its predecessor, and most of the storms in the season remained over water or only brushed land. The first system was Tropical Depression A1, which formed in October and passed north of Madagascar. The first named storm was Albertine, which formed on November 23 in the northeastern portion of the basin and became one of three intense tropical cyclones. The last storm was Marlene, which was also an intense tropical cyclone and dissipated on April 11.
Very Intense Tropical Cyclone Hary was the strongest tropical cyclone in the 2001–02 South-West Indian Ocean cyclone season. Developing on March 5 from the monsoon trough, the storm initially moved generally to the west and gradually intensified. With favorable conditions, Hary quickly intensified on March 7, developing an eye and well-defined outflow. After reaching an initial peak, the cyclone briefly weakened due to an eyewall replacement cycle, by which time the storm turned southwestward toward Madagascar. Hary re-intensified and attained peak winds of 220 km/h (140 mph) on March 10 just offshore eastern Madagascar, which made it the first very intense tropical cyclone since 2000.
Tropical Cyclone Alibera was the third longest-lasting tropical cyclone on record in the south-west Indian Ocean, with a duration of 22 days. It formed on December 16, 1989, well to the northeast of Madagascar. For several days, it meandered southwestward while gradually intensifying. On December 20, Alibera intensified to tropical cyclone status with 10‑minute maximum sustained winds of 120 km/h (75 mph), or the equivalent of a minimal hurricane. That day, the Météo-France office in Réunion (MFR) estimated 10‑minute winds of 140 km/h (87 mph), while the Joint Typhoon Warning Center (JTWC), an unofficial warning agency for the region, estimated peak 1‑minute winds of 250 km/h (160 mph). After drifting erratically for several days, the storm began a steady southwest motion on December 29 as a greatly weakened system. On January 1, Alibera struck southeastern Madagascar near Mananjary, having re-intensified to just below tropical cyclone status. It weakened over land but again restrengthened upon reaching open waters on January 3. The storm turned to the southeast, then to the southwest, and finally back to the southeast, dissipating on January 5.
The 2015–16 South-West Indian Ocean cyclone season was a slightly below average event in tropical cyclone formation. The annual cyclone season began on November 15, 2015, with the first storm, Annabelle, forming four days following. The final and strongest storm, Fantala, dissipated on April 23, 2016, a week before the season ended on April 30 for most of the region. In Mauritius and the Seychelles, the cyclone season ended half a month later, on May 15. The season's activity was influenced by an ongoing El Niño, and a positive Indian Ocean Dipole.
Very Intense Tropical Cyclone Fantala was the most intense tropical cyclone recorded in the South-West Indian Ocean in terms of sustained winds. Part of the 2015–16 cyclone season, Fantala formed on 11 April to the south of Diego Garcia, an island in the central Indian Ocean. With a ridge to the south, the storm moved westward for several days while gaining strength, aided by warm waters and decreasing wind shear. Late on 17 April, the Météo-France office on Réunion (MFR) estimated peak 10-minute winds of 250 km/h (155 mph), making Fantala the strongest tropical cyclone of the basin in terms of 10-minute sustained winds. The Joint Typhoon Warning Center (JTWC) estimated peak 1-minute winds of 285 km/h (180 mph), equivalent to Category 5 intensity on the Saffir-Simpson scale, also the strongest on record in the South-West Indian Ocean, in terms of maximum sustained wind speed. Early on 18 April, Fantala reached its peak intensity, with a minimum central pressure of 910 millibars (27 inHg).
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.
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