Misplaced Pages

This is an old revision of this page, as edited by Es204L (talk | contribs) at 00:42, 14 February 2019 (gele na). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

2018–19 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed	September 13, 2018
Last system dissipated	Season ongoing
Strongest storm
Name	Cilida
• Maximum winds	215 km/h (130 mph) (10-minute sustained)
• Lowest pressure	940 hPa (mbar)
Seasonal statistics
Total disturbances	9
Total depressions	9
Total storms	9
Tropical cyclones	5
Intense tropical cyclones	5
Total fatalities	27 total
Total damage	None
Related articles
2018–19 Australian region cyclone season 2018–19 South Pacific cyclone season
South-West Indian Ocean tropical cyclone seasons 2016–17, 2017–18, 2018–19, 2019–20, 2020–21

The 2018–19 South-West Indian Ocean cyclone season is an ongoing and above-average event of the annual cycle of tropical cyclone and subtropical cyclone formation. It officially began on November 15, 2018, and will end on April 30, 2019, with the exception for Mauritius and the Seychelles, for which it will end on May 15, 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 first tropical cyclone was a Moderate Tropical Storm that did not receive a name formed near Madagascar on September 13, 2018 two months before the official start of the season. Two cyclones formed in the month of November, with Intense Tropical Cyclone Alcide forming on November 5 and Severe Tropical Storm Bouchra Australian region. Two tropical cyclones formed in the month of December, Cilida and Kenanga. Intense Tropical Cyclone Kenanga crossed into the basin from the Australian region, retaining its name assigned by TCWC Jakarta. Two Moderate Tropical Storms formed in the month of January 2019, Desmond and Eketsang. In the month of February, two simultaneous tropical cyclones, Funani and Gelena, formed. The season saw five intense tropical cyclones, the most since 2006-07.

Seasonal summary

The season officially began on November 15, 2018, and will end on April 30, 2019, with the exception for Mauritius and the Seychelles, for which it will end on May 15, 2019.

Systems

Moderate Tropical Storm 01

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
Duration	September 13 – September 17
Peak intensity	75 km/h (45 mph) (10-min); 1004 hPa (mbar)

On September 13, a tropical depression (tropical storm on the SSHWS scale) formed to the southwest of Diego Garcia. The system tracked west-southwestward, organizing slowly over marginally warm waters of 26–27 degrees Celsius and moderate wind shear. On September 16, the tropical depression began to weaken after encountering unfavorable conditions. On September 17, both the MFR and the JTWC issued their final warnings, and the system dissipated. In post-storm analysis, the system was upgraded into a moderate tropical storm although it remained unnamed.

Intense Tropical Cyclone Alcide

Intense tropical cyclone (MFR)
Category 3 tropical cyclone (SSHWS)
Duration	November 5 – November 12
Peak intensity	165 km/h (105 mph) (10-min); 965 hPa (mbar)

On November 6, a tropical depression formed well to the east-northeast of Madagascar. The system continued to track generally west-southwestward into more favorable conditions for the next few hours, before strengthening into Moderate Tropical Storm Alcide later that day. On November 7 at 06:00 UTC, Alcide strengthened into a tropical cyclone. On November 8 at 06:00 UTC, Alcide strengthened into an intense tropical cyclone, with maximum 10-minute sustained winds of 90 knots (165 km/h; 105 mph). It was downgraded to a tropical cyclone 6 hours later, however, due to cooler sea temperatures and generally less favorable conditions. Alcide continued to weaken as it began an anticyclonic loop east of the northern tip of Madagascar, falling to tropical storm status at 12:00 UTC on November 9. The system rapidly deteriorated thereafter, falling to tropical depression status at 00:00 UTC on November 11; Meteo-France discontinued advisories at noon that day.

Severe Tropical Storm Bouchra

Severe tropical storm (MFR)
Tropical storm (SSHWS)
Duration	November 9 – November 19 (Out of basin from November 9 to 10, from November 12 to 13, and from November 14 to 16)
Peak intensity	95 km/h (60 mph) (10-min); 990 hPa (mbar)

A weak low-pressure system developed in the equatorial Indian Ocean in Météo-France's area of responsibility on November 1 and moved slowly eastwards over the following few days while showing little signs of intensification. Late on November 9, as the developing precursor depression to Cyclonic Storm Gaja in the Bay of Bengal moved further away and the competing low-level airflow convergence associated with it diminished, the system's structure organised sufficiently to be classified as a tropical disturbance by Météo-France. Very shortly afterwards, the system crossed the 90th meridian east and entered the Australian region, where it was classified by TCWC Jakarta as a tropical depression on November 10 local time. Later the same day, the JTWC assessed the developing low as having attained tropical storm status on the Saffir-Simpson Hurricane Wind Scale, and assigned the system the unofficial designation 04S. A few hours later, at 10:00 UTC, the system moved back westwards and returned to the South-West Indian Ocean basin, where it gained the name 'Bouchra' from Météo-France and underwent a twelve-hour phase of rapid intensification to severe tropical storm status.

Over the following days, Bouchra fought increasingly unfavorable atmospheric conditions, and underwent a gradual weakening trend. During this time, the cyclone proceeded to track in a slow cyclonic loop just to the west of the border of the Australian region in weak overall steering influences, and was often quasi-stationary. After meandering here for a number of days, the system re-entered the Australian region late on November 12. By this stage, the system had weakened significantly from its peak intensity, and was only at tropical depression strength. The period of residence in the Australian basin proved to be short-lived once again, however, with Météo-France indicating that Ex-Tropical Storm Bouchra had returned to the far eastern part of their area of responsibility early on November 13. In the early hours of November 14, the Australian Bureau of Meteorology noted that the system had crossed back into the Australian region.

Intense Tropical Cyclone Kenanga

Intense tropical cyclone (MFR)
Category 4 tropical cyclone (SSHWS)
Duration	December 16 (Entered basin) – December 22
Peak intensity	185 km/h (115 mph) (10-min); 942 hPa (mbar)

On December 14, a tropical low formed well southwest of Sumatra in the Australian region. After a period of strengthening, it received the name Kenanga as it tracked roughly southwestward. Continuing on this course, it entered the South-West Indian basin on 16 December and subsequently strengthened into an intense tropical cyclone over the course of the next three days. Kenanga then dissipated on December 22.

Intense Tropical Cyclone Cilida

Intense tropical cyclone (MFR)
Category 4 tropical cyclone (SSHWS)
Duration	December 16 – December 24
Peak intensity	215 km/h (130 mph) (10-min); 940 hPa (mbar)

On December 16 Metro-France tracked a low-pressure area in possible are tropical cyclone development. While tracking southwest, it then intensified to tropical storm, then cyclone, status. On December 23, as Cyclone Cilida, it passed east of Mauritius, bringing beneficial rainfall and gusting winds that knocked down tree branches. It then turned southeast and weakened, later dissipating in the far southern reaches of the basin.

Moderate Tropical Storm Desmond

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
Duration	January 17 – January 22
Peak intensity	65 km/h (40 mph) (10-min); 995 hPa (mbar)

This section needs expansion. You can help by adding to it. (February 2019)

A total of 230 people were affected by Desmond, and 54 houses were destroyed by the storm.

Moderate Tropical Storm Eketsang

Moderate tropical storm (MFR)
Duration	January 22 – January 24
Peak intensity	75 km/h (45 mph) (10-min); 993 hPa (mbar)

This section needs expansion. You can help by adding to it. (February 2019)

The storm left 27 dead and 1 missing in Madagascar, mostly due to landslides.

Intense Tropical Cyclone Funani

Intense tropical cyclone (MFR)
Category 4 tropical cyclone (SSHWS)
Duration	February 3 – February 10
Peak intensity	195 km/h (120 mph) (10-min); 940 hPa (mbar)

This section needs expansion. You can help by adding to it. (February 2019)

The threat of the storm spurred officials to cancel 6 flights on Rodrigues.

Intense Tropical Cyclone Gelena

Intense tropical cyclone (MFR)
Category 4 tropical cyclone (SSHWS)
Duration	February 4 – February 14
Peak intensity	205 km/h (125 mph) (10-min); 942 hPa (mbar)

This section needs expansion. You can help by adding to it. (February 2019)

Gelena was the second storm to affect Rodrigues in a week. Gelena brought strong winds that destroyed 90% of the electric grid on the island. The Mauritian government distributed Rs 35 million (US$1.02 million) to repair damage.

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 a storm should it intensify into a moderate tropical storm between 55°E and 90°E. If instead a cyclone intensifies 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. Beginning from the 2016–17 season, name lists within the South-West Indian Ocean will be rotated on a triennial basis. Storm names are only used once, so any storm name used this year will be removed from rotation and replaced with a new name for the 2021–22 season. The unused names are expected to be reused in the list for the 2021–22 season.

Kenanga entered this basin as a moderate tropical storm from the Australian region on December 16, retaining its name assigned by TCWC Jakarta.

Seasonal effects

This table lists all of the tropical cyclones and subtropical cyclones that were monitored during the 2018–2019 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 2018 or 2019 USD.

See also

• Tropical cyclones in 2018 and 2019
• List of Southern Hemisphere cyclone seasons
• Atlantic hurricane seasons: 2018, 2019
• Pacific hurricane seasons: 2018, 2019
• Pacific typhoon seasons: 2018, 2019
• North Indian Ocean cyclone seasons: 2018, 2019
• 2018–19 Australian region cyclone season
• 2018–19 South Pacific cyclone season

References

1. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201809140600_1_1_20182019.pdf (in French)
2. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201809150600_3_1_20182019.pdf (in French)
3. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201809170600_7_1_20182019.pdf (in French)
4. "Saisons cycloniques archivées: Tempête Tropicale Modérée 01" (in French). Météo-France. 2018. Retrieved November 8, 2018.
5. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811060600_1_2_20182019.pdf (in French)
6. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811061800_ALCIDE.pdf (in French)
7. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811070600_ALCIDE.pdf (in French)
8. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811080600_ALCIDE.pdf (in French)
9. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811081200_ALCIDE.pdf (in French)
10. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811091200_ALCIDE.pdf (in French)
11. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811110000_EX-ALCIDE.pdf (in French)
12. http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/cmrs/CMRSF_201811111200_EX-ALCIDE.pdf (in French)
13. "12 UTC Gradient Level Wind Analysis Chart". Bureau of Meteorology. 1 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
14. "Tropical Activity Bulletin" (PDF). Météo-France La Réunion. 9 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
15. "Moderate Tropical Storm Bouchra Forecast Track Map". Météo-France La Réunion. 10 November 2018. Archived from the original on 11 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
16. "Current Tropical Cyclone Basin Activity". Meteorology, Climatology and Geophysical Agency. 10 November 2018. Archived from the original on 10 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
17. "Tropical Cyclone 04S Warning #1". Joint Typhoon Warning Center. 10 November 2018. Archived from the original on 10 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
18. "Tropical Activity Bulletin" (PDF). Météo-France La Réunion. 10 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
19. "Bouchra Analysis Bulletin #2" (PDF). Météo-France La Réunion. 11 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
20. ^ "Tropical Storm Bouchra Advisory (12 UTC)" (PDF). Météo-France La Réunion. 11 November 2018. Retrieved 14 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
21. ^ "Tropical Activity Bulletin" (PDF). Météo-France La Réunion. 13 November 2018. Retrieved 13 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
22. "Western Region Tropical Cyclone Outlook". Bureau of Meteorology. 13 November 2018. Archived from the original on 13 November 2018. Retrieved 13 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
23. "Western Region Tropical Cyclone Outlook". Bureau of Meteorology. 14 November 2018. Archived from the original on 14 November 2018. Retrieved 14 November 2018. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
24. "Cilida: un petit tour puis s'en va". Le Express. December 23, 2018. Retrieved January 3, 2019.
25. Shabneeze Oozeear (December 25, 2018). "Cilida : les pluies apportées par le cyclone bénéfique aux plantations". Mauritius Broadcasting Corporation. Retrieved January 3, 2019.
26. Hélia Chopo (January 23, 2019). "Mais de 400 famílias afectadas pela tempestade "Desmond" em Sofala" (in Portuguese). O PAÍS. Retrieved January 30, 2019.
27. "Madagascar : 27 morts suite au fortes pluies et à la Tempête EKETSANG" (in French). Cyclone Ocean Indien. January 31, 2019. Retrieved February 3, 2019.
28. "Cyclone Funani : Air Mauritius annule six vols de Rodrigues" (in French). Le Mauricien. February 7, 2019. Retrieved February 11, 2019.
29. "Mauritian government set to disburse funds to cylone-affected community". Africa Daily Voice. February 11, 2019. Retrieved February 12, 2019.
30. Regional Association I Tropical Cyclone Committee (2016). "Tropical Cyclone Operational Plan for the South-West Indian Ocean" (PDF). World Meteorological Organization. Retrieved 2016-10-05.

External links

• Météo-France La Réunion Template:Fr
• Direction Générale de la Météorologie de Madagascar Template:Fr
• Mauritius Meteorological Services
• Joint Typhoon Warning Center (JTWC)

v t e Tropical cyclones of the 2018–19 South-West Indian Ocean cyclone season
	MTS01 ITCAlcide STSBouchra ITCKenanga ITCCilida MTSDesmond MTSEketsang ITCFunani ITCGelena ITCHaleh ITCIdai TCSavannah ITCJoaninha ITCKenneth TCLorna
Category

• 2018–19 South-West Indian Ocean cyclone season
• South-West Indian Ocean cyclone seasons