User:PurpleLights/Timeline of the 2017–18 South-West Indian Ocean cyclone season

Timeline of the
2017–18 South-West Indian Ocean cyclone season
Timeline of the; 2017–18 South-West Indian Ocean cyclone season
	Season summary map
Season boundaries
First system formed	27 December 2017
Last system dissipated	4 May 2018
Strongest system
Name	Cebile
Maximum winds	185 km/h (115 mph); (10-minute sustained)
Lowest pressure	940 hPa (mbar)
Longest lasting system
Name	Cebile
Duration	13.50 days
Storm articles
	Cyclone Ava; Cyclone Berguitta; Cyclone Dumazile; Tropical Storm Eliakim; Cyclone Fakir; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
	Other years ; 2015–16, 2016–17, 2017–18, 2018–19, 2019–20

The 2017–18 South-West Indian Ocean cyclone season was an event in the annual cycle of tropical cyclone formation.

Timeline of events

December

27 December

12:00 UTC (4:00 p.m. UTC+04:00^[a]) at 9°06′S 69°12′E / 9.1°S 69.2°E / -9.1; 69.2 – Meteo-France reports that Zone of Disturbed Weather 01 has formed about 1,335 km (830 mi) northeast from Rodrigues.^[3]

30 December

06:00 UTC (10:00 a.m. UTC+04:00) at 11°30′S 64°54′E / 11.5°S 64.9°E / -11.5; 64.9 – The Joint Typhoon Warning Center (JTWC) reports that Tropical Depression 03S has formed approximately 930 km (580 mi) north-northeast of Rodrigues.^[4]

January

2 January

06:00 UTC (10:00 a.m. UTC+04:00) at 16°06′S 54°00′E / 16.1°S 54.0°E / -16.1; 54.0 – Meteo-France reports that Zone of Disturbed Weather 01 has intensified into a Tropical Disturbance about 455 km (285 mi) east-southeast of Sambava, Madagascar.^[3]
18:00 UTC (10:00 p.m. UTC+04:00) at 15°42′S 53°06′E / 15.7°S 53.1°E / -15.7; 53.1 – Meteo-France reports that Tropical Disturbance 01 has strengthened into a Tropical Depression about 350 km (215 mi) east-southeast of Sambava, Madagascar.^[3]

3 January

06:00 UTC (10:00 a.m. UTC+04:00) at 15°18′S 53°06′E / 15.3°S 53.1°E / -15.3; 53.1 – Meteo-France reports that Tropical Depression 01 has intensified into a Moderate Tropical Storm about 300 km (185 mi) east of Sambava, Madagascar, and is named Ava.^[3]

4 January

06:00 UTC (10:00 a.m. UTC+04:00) at 17°18′S 52°00′E / 17.3°S 52.0°E / -17.3; 52.0 – Meteo-France reports that Moderate Tropical Storm Ava has strengthened into a Severe Tropical Storm about 295 km (185 mi) southeast of Toamasina, Madagascar.^[3]

5 January

00:00 UTC (4:00 a.m. UTC+04:00) at 17°12′S 50°36′E / 17.2°S 50.6°E / -17.2; 50.6 – Meteo-France reports that Severe Tropical Storm Ava has intensified into a Tropical Cyclone^[b] about 170 km (105 mi) south of Toamasina, Madagascar.^[3]
00:00 UTC (4:00 a.m. UTC+04:00) at 10°36′S 94°48′E / 10.6°S 94.8°E / -10.6; 94.8 – Meteo-France reports that Zone of Disturbed Weather 02 has formed in the Australian basin about 1,120 km (695 mi) southwest of Bengkulu, Indonesia.^[5]^[c]
12:00 UTC (4:00 p.m. UTC+04:00) at 18°06′S 49°18′E / 18.1°S 49.3°E / -18.1; 49.3 – Meteo-France reports that Tropical Cyclone Ava has reached its peak intensity, with 10-minute sustained winds of 155 km/h (95 mph) and gusts up to 220 km/h (135 mph), as well as a minimum pressure of 965 mbar (28.50 inHg) about 15 km (10 mi) north of Toamasina, Madagascar.^[3]
12:00 UTC (4:00 p.m. UTC+04:00) at 11°54′S 93°30′E / 11.9°S 93.5°E / -11.9; 93.5 – Meteo-France reports that Zone of Disturbed Weather 02 has strengthened into a Tropical Disturbance about 1,320 km (820 mi) southwest of Bengkulu, Indonesia.^[5]
18:00 UTC (10:00 p.m. UTC+04:00) at 18°30′S 48°54′E / 18.5°S 48.9°E / -18.5; 48.9 – Meteo-France reports that Tropical Cyclone Ava has made landfall about 60 km (35 mi) southwest of Toamasina, Madagascar, transitioning to an overland depression.^[3]
18:00 UTC (10:00 p.m. UTC+04:00) at 12°24′S 92°36′E / 12.4°S 92.6°E / -12.4; 92.6 – Meteo-France reports that Tropical Disturbance 02 has intensified into a Tropical Depression about 1,430 km (890 mi) southwest of Bengkulu, Indonesia.^[5]

6 January

00:00 UTC (4:00 a.m. UTC+04:00) at 12°36′S 92°18′E / 12.6°S 92.3°E / -12.6; 92.3 – Meteo-France reports that Tropical Depression 02 has strengthened into a Moderate Tropical Storm about 1,470 km (915 mi) southwest of Bengkulu, Indonesia, and is named Irving by the Bureau of Meteorology.^[5]

7 January

06:00 UTC (10:00 a.m. UTC+04:00) at 22°48′S 48°36′E / 22.8°S 48.6°E / -22.8; 48.6 – Meteo-France reports that Overland Depression Ava has crossed back into the South-West Indian Ocean, transforming back into a Moderate Tropical Storm about 90 km (55 mi) southeast of Manakara, Madagascar.^[3]
06:00 UTC (10:00 a.m. UTC+04:00) at 13°48′S 85°42′E / 13.8°S 85.7°E / -13.8; 85.7 – Meteo-France reports that Moderate Tropical Storm Irving has strengthened to a Severe Tropical Storm about 2,460 km (1,530 mi) east-northeast of Rodrigues.^[5]
18:00 UTC (10:00 p.m. UTC+04:00) at 15°42′S 82°30′E / 15.7°S 82.5°E / -15.7; 82.5 – Meteo-France reports that Severe Tropical Storm Irving has intensified to a Tropical Cyclone about 2,070 km (1,285 mi) east-northeast of Rodrigues.^[5]

8 January

00:00 UTC (4:00 a.m. UTC+04:00) at 24°36′S 49°06′E / 24.6°S 49.1°E / -24.6; 49.1 – Meteo-France reports that Moderate Tropical Storm Ava has weakened to a Tropical Depression about 290 km (180 mi) south-southeast of Manakara, Madagascar.^[3]
00:00 UTC (4:00 a.m. UTC+04:00) at 16°36′S 81°18′E / 16.6°S 81.3°E / -16.6; 81.3 – Meteo-France reports that Tropical Cyclone Irving has reached its peak intensity with wind speeds of 150 km/h (95 mph) and a minimum pressure of 964 mbar (28.47 inHg) about 1,920 km (1,195 mi) east-northeast of Rodrigues.^[5]
06:00 UTC (10:00 a.m. UTC+04:00) at 25°24′S 49°18′E / 25.4°S 49.3°E / -25.4; 49.3 – Meteo-France reports that Tropical Depression Ava has strengthened back into a Moderate Tropical Storm about 235 km (145 mi) east of Tôlanaro, Madagascar.^[3]

9 January

06:00 UTC (10:00 a.m. UTC+04:00) at 28°48′S 48°18′E / 28.8°S 48.3°E / -28.8; 48.3 – Meteo-France reports that Moderate Tropical Storm Ava has transitioned to a post-tropical depression about 440 km (270 mi) south-southeast of Tôlanaro, Madagascar.^[3]
06:00 UTC (10:00 a.m. UTC+04:00) at 21°12′S 73°30′E / 21.2°S 73.5°E / -21.2; 73.5 – Meteo-France reports that Tropical Cyclone Irving has degenerated to a Severe Tropical Storm about 1,065 km (660 mi) east of Rodrigues.^[5]
18:00 UTC (10:00 p.m. UTC+04:00) at 31°18′S 49°30′E / 31.3°S 49.5°E / -31.3; 49.5 – Meteo-France reports that Post-Tropical Depression Ava has dissipated about 740 km (460 mi) southeast of Tôlanaro, Madagascar.^[3]
18:00 UTC (10:00 p.m. UTC+04:00) at 10°54′S 68°54′E / 10.9°S 68.9°E / -10.9; 68.9 – Meteo-France reports that Zone of Disturbed Weather 03 has formed about 1,345 km (835 mi) east of Agaléga.^[6]

10 January

00:00 UTC (4:00 a.m. UTC+04:00) at 25°36′S 69°06′E / 25.6°S 69.1°E / -25.6; 69.1 – Meteo-France reports that Severe Tropical Storm Irving has transitioned to a Post-Tropical Depression about 880 km (545 mi) southeast of Rodrigues.^[5]

11 January

06:00 UTC (10:00 a.m. UTC+04:00) at 40°30′S 75°54′E / 40.5°S 75.9°E / -40.5; 75.9 – Meteo-France reports that Post-Tropical Depression Irving has dissipated about 2,600 km (1,615 mi) southeast of Rodrigues.^[5]

12 January

06:00 UTC (10:00 a.m. UTC+04:00) at 16°06′S 68°36′E / 16.1°S 68.6°E / -16.1; 68.6 – Meteo-France reports that Zone of Disturbed Weather 03 has intensified to Tropical Disturbance 03 about 680 km (425 mi) northeast of Rodrigues.^[6]

13 January

00:00 UTC (4:00 a.m. UTC+04:00) at 17°30′S 65°42′E / 17.5°S 65.7°E / -17.5; 65.7 – Meteo-France reports that Tropical Disturbance 03 has strengthened into Tropical Depression 03 about 345 km (215 mi) northeast of Rodrigues.^[6]
12:00 UTC (4:00 p.m. UTC+04:00) at 18°00′S 64°30′E / 18.0°S 64.5°E / -18.0; 64.5 – Meteo-France reports that Tropical Depression 03 has strengthened into a Moderate Tropical Storm about 220 km (135 mi) north-northeast of Rodrigues, receiving the name Berguitta.^[6]

14 January

12:00 UTC (4:00 p.m. UTC+04:00) at 18°00′S 63°06′E / 18.0°S 63.1°E / -18.0; 63.1 – Meteo-France reports that Moderate Tropical Storm Berguitta has intensified to a Severe Tropical Storm about 190 km (120 mi) north of Rodrigues.^[6]
18:00 UTC (10:00 p.m. UTC+04:00) at 15°36′N 42°12′E / 15.6°N 42.2°E / 15.6; 42.2 – Meteo-France reports that Zone of Disturbed Weather 04 has formed about 255 km (160 mi) northeast of Angoche, Mozambique.^[7]

15 January

06:00 UTC (10:00 a.m. UTC+04:00) at 14°48′S 41°42′E / 14.8°S 41.7°E / -14.8; 41.7 – Meteo-France reports that Zone of Disturbed Weather 04 has strengthened into a Tropical Disturbance about 240 km (150 mi) northeast of Angoche, Mozambique.^[7]

12:00 UTC (4:00 p.m. UTC+04:00) at 17°54′S 63°00′E / 17.9°S 63.0°E / -17.9; 63.0 – Meteo-France reports that Severe Tropical Storm Berguitta has rapidly strengthened into an Intense Tropical Cyclone about 205 km (125 mi) north-northwest of Rodrigues. It simultaneously reaches its peak intensity, with wind speeds of 165 km/h (105 mph) and a minimum pressure of 940 mbar (27.76 inHg).^[6]
12:00 UTC (4:00 p.m. UTC+04:00) at 15°18′S 41°18′E / 15.3°S 41.3°E / -15.3; 41.3 – Meteo-France reports that Tropical Disturbance 04 has strengthened into a Tropical Depression about 170 km (105 mi) northeast of Angoche, Mozambique, simultaneously reaching its peak intensity with winds of 45 km/h (30 mph) and a minimum pressure of 999 mbar (29.50 inHg).^[7]

16 January

00:00 UTC (4:00 a.m. UTC+04:00) at 15°18′S 40°24′W / 15.3°S 40.4°W / -15.3; -40.4 – Meteo-France reports that Tropical Depression 04 has made landfall about 115 km (70 mi) north-northeast of Angoche, Mozambique, transitioning to an overland depression.^[7]

06:00 UTC (10:00 a.m. UTC+04:00) at 18°06′S 61°30′E / 18.1°S 61.5°E / -18.1; 61.5 – Meteo-France reports that Intense Tropical Cyclone Berguitta has weakened to a Tropical Cyclone about 270 km (170 mi) northwest of Rodrigues.^[6]
06:00 UTC (10:00 a.m. UTC+04:00) at 14°48′S 39°48′E / 14.8°S 39.8°E / -14.8; 39.8 – Meteo-France reports that Overland Depression 04 has dissipated over Mozambique about 155 km (95 mi) north of Angoche.^[7]

17 January

06:00 UTC (10:00 a.m. UTC+04:00) at 18°24′S 60°00′E / 18.4°S 60.0°E / -18.4; 60.0 – Meteo-France reports that Tropical Cyclone Berguitta has weakened to a Severe Tropical Storm about 330 km (205 mi) northeast of Mauritius.^[6]

19 January

00:00 UTC (4:00 a.m. UTC+04:00) at 23°12′S 54°30′E / 23.2°S 54.5°E / -23.2; 54.5 – Meteo-France reports that Severe Tropical Storm Berguitta has weakened to a Moderate Tropical Storm about 255 km (160 mi) south-southwest ofRéunion.^[6]

20 January

06:00 UTC (10:00 a.m. UTC+04:00) at 29°18′S 49°36′E / 29.3°S 49.6°E / -29.3; 49.6 – Meteo-France reports that Moderate Tropical Storm Berguitta has degenerated to a post-tropical depression about 255 km (160 mi) southeast of Tôlonaro, Madagascar.^[6]

24 January

00:00 UTC (4:00 a.m. UTC+04:00) at 39°24′S 64°06′E / 39.4°S 64.1°E / -39.4; 64.1 – Meteo-France reports that Post-Tropical Depression Berguitta has begun dissipating about 1,945 km (1,210 mi) southeast of Tôlonaro, Madagascar.^[6]
06:00 UTC (10:00 a.m. UTC+04:00) at 39°36′S 65°00′E / 39.6°S 65.0°E / -39.6; 65.0 – Meteo-France reports that Post-Tropical Depression Berguitta has dissipated about 2,025 km (1,260 mi) southeast of Tôlonaro, Madagascar.^[6]

25 January

06:00 UTC (10:00 a.m. UTC+04:00) at 9°18′S 80°12′E / 9.3°S 80.2°E / -9.3; 80.2 – Meteo-France reports that Zone of Disturbed Weather 05 has formed about 2,585 km (1,605 mi) east-northeast of Agaléga.^[8]

26 January

12:00 UTC (4:00 p.m. UTC+04:00) at 10°18′S 83°12′E / 10.3°S 83.2°E / -10.3; 83.2 – Meteo-France reports that Zone of Disturbed Weather 05 has strengthened into a Tropical Disturbance about 2,905 km (1,805 mi) east of Agaléga.^[8]

27 January

06:00 UTC (10:00 a.m. UTC+04:00) at 11°06′S 85°00′E / 11.1°S 85.0°E / -11.1; 85.0 – Meteo-France reports that Tropical Disturbance 05 has intensified into a Tropical Depression about 3,100 km (1,925 mi) east of Agaléga.^[8]
18:00 UTC (10:00 p.m. UTC+04:00) at 11°42′S 84°42′E / 11.7°S 84.7°E / -11.7; 84.7 – Meteo-France reports that Tropical Disturbance 05 has intensified into a Moderate Tropical Storm about 3,065 km (1,905 mi) east-southeast of Agaléga. It is subsequently named Cebile.^[8]

28 January

00:00 UTC (4:00 a.m. UTC+04:00) at 12°30′S 84°24′E / 12.5°S 84.4°E / -12.5; 84.4 – Meteo-France reports that Moderate Tropical Storm Cebile has rapidly intensified into a Severe Tropical Storm about 3,035 km (1,886 mi) east-southeast of Agaléga.^[8]
06:00 UTC (10:00 a.m. UTC+04:00) at 13°06′S 84°00′E / 13.1°S 84.0°E / -13.1; 84.0 – Meteo-France reports that Severe Tropical Storm Cebile has rapidly intensified into a Tropical Cyclone about 2,995 km (1,860 mi) east-southeast of Agaléga.^[8]
12:00 UTC (4:00 p.m. UTC+04:00) at 13°48′S 83°00′E / 13.8°S 83.0°E / -13.8; 83.0 – Meteo-France reports that Tropical Cyclone Cebile has rapidly intensified into an Intense Tropical Cyclone about 2,890 km (1,795 mi) east-southeast of Agaléga.^[8]

18:00 UTC (10:00 p.m. UTC+04:00) at 14°06′S 82°42′E / 14.1°S 82.7°E / -14.1; 82.7 – Meteo-France reports that Intense Tropical Cyclone Cebile has reached its peak intensity, with 10-minute sustained winds of 185 km/h (115 mph) and a minimum pressure of 944 mbar (27.88 inHg) about 2,140 km (1,330 mi) east-southeast of Rodrigues.^[8]

29 January

18:00 UTC (10:00 p.m. UTC+04:00) at 15°42′S 80°42′E / 15.7°S 80.7°E / -15.7; 80.7 – Meteo-France reports that Intense Tropical Cyclone Cebile has weakened to a Tropical Cyclone about 1,885 km (1,170 mi) east-southeast of Rodrigues.^[8]

February

March

April

Notes

^ UTC+04:00 is the time zone used by Réunion,^[1] where the official tropical cyclone warning center for the South-West Indian Ocean is.^[2]
^ Tropical Cyclone is a designation used by Meteo-France to describe cyclones which have sustained wind speeds between 118 and 165 km/h.
^ Cyclone Irving later entered the South-West Indian Ocean on January 6 at 12:00 UTC. Meteo-France's best track data tracks Irving throughout its lifetime.^[5]

References

^ "World Time Zone Map Section # 19". WorldTimeZone.com. Retrieved 28 June 2021.
^ Introducing a new graphical product supplied by RSMC La Reunion called "Cyclogenesis risk prognosis map for the South-West Indian Ocean" (PDF) (Report). Réunion: Meteo-France. 15 November 2016. Retrieved 28 June 2021.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m "Ava du 27/12/2017 au 09/01/2018". Meteo France (in French). Retrieved June 28, 2021.{{cite web}}: CS1 maint: url-status (link)
^ Chu, J. H.; Levine, A.; Daida, S.; Schiber, D.; Fukada, E.; Sampson, C. R. (2019). "Western North Pacific Ocean Best Track Data 2018". Joint Typhoon Warning Center. Retrieved May 16, 2020.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k "Irving du 05/01/2018 au 11/01/2018" (in French). Meteo-France. Retrieved July 17, 2021.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l "Berguitta du 09/01/2018 au 24/01/2018" (in French). Meteo-France. Retrieved July 24, 2021.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d ^e "04-20172018 du 14/01/2018 au 16/02/2018". Meteo-France (in French). Retrieved August 29, 2021.{{cite web}}: CS1 maint: url-status (link)
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ "Cebile du 25/01/2018 au 09/02/2018". Meteo-France (in French). Retrieved September 4, 2021.{{cite web}}: CS1 maint: url-status (link)

[3] UTC+04:00 is the time zone used by Réunion,^[1] where the official tropical cyclone warning center for the South-West Indian Ocean is.^[2]

[6] Tropical Cyclone is a designation used by Meteo-France to describe cyclones which have sustained wind speeds between 118 and 165 km/h.

[8] Cyclone Irving later entered the South-West Indian Ocean on January 6 at 12:00 UTC. Meteo-France's best track data tracks Irving throughout its lifetime.^[5]

[1] "World Time Zone Map Section # 19". WorldTimeZone.com. Retrieved 28 June 2021.

[2] Introducing a new graphical product supplied by RSMC La Reunion called "Cyclogenesis risk prognosis map for the South-West Indian Ocean" (PDF) (Report). Réunion: Meteo-France. 15 November 2016. Retrieved 28 June 2021.

[:0-4] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m "Ava du 27/12/2017 au 09/01/2018". Meteo France (in French). Retrieved June 28, 2021.{{cite web}}: CS1 maint: url-status (link)

[JTWC_BT-5] Chu, J. H.; Levine, A.; Daida, S.; Schiber, D.; Fukada, E.; Sampson, C. R. (2019). "Western North Pacific Ocean Best Track Data 2018". Joint Typhoon Warning Center. Retrieved May 16, 2020.

[:1-7] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k "Irving du 05/01/2018 au 11/01/2018" (in French). Meteo-France. Retrieved July 17, 2021.{{cite web}}: CS1 maint: url-status (link)

[:2-9] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l "Berguitta du 09/01/2018 au 24/01/2018" (in French). Meteo-France. Retrieved July 24, 2021.{{cite web}}: CS1 maint: url-status (link)

[:3-10] "04-20172018 du 14/01/2018 au 16/02/2018". Meteo-France (in French). Retrieved August 29, 2021.{{cite web}}: CS1 maint: url-status (link)

[:4-11] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ "Cebile du 25/01/2018 au 09/02/2018". Meteo-France (in French). Retrieved September 4, 2021.{{cite web}}: CS1 maint: url-status (link)

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