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

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

27 December

 * 12:00 UTC (4:00 p.m. UTC+04:00) at -9.1°N, 69.2°W Meteo-France reports that Zone of Disturbed Weather 01 has formed about 1335 km northeast from Rodrigues.

30 December

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -11.5°N, 64.9°W  The Joint Typhoon Warning Center (JTWC) reports that Tropical Depression 03S has formed approximately 930 km north-northeast of Rodrigues.

2 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -16.1°N, 54°W  Meteo-France reports that Zone of Disturbed Weather 01 has intensified into a Tropical Disturbance about 455 km east-southeast of Sambava, Madagascar.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -15.7°N, 53.1°W Meteo-France reports that Tropical Disturbance 01 has strengthened into a Tropical Depression about 350 km east-southeast of Sambava, Madagascar.

3 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -15.3°N, 53.1°W Meteo-France reports that Tropical Depression 01 has intensified into a Moderate Tropical Storm about 300 km east of Sambava, Madagascar, and is named Ava.

4 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -17.3°N, 52°W Meteo-France reports that Moderate Tropical Storm Ava has strengthened into a Severe Tropical Storm about 295 km southeast of Toamasina, Madagascar.

5 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -17.2°N, 50.6°W Meteo-France reports that Severe Tropical Storm Ava has intensified into a Tropical Cyclone about 170 km south of Toamasina, Madagascar.
 * 00:00 UTC (4:00 a.m. UTC+04:00) at -10.6°N, 94.8°W Meteo-France reports that Zone of Disturbed Weather 02 has formed in the Australian basin about 1120 km southwest of Bengkulu, Indonesia.
 * 12:00 UTC (4:00 p.m. UTC+04:00) at -18.1°N, 49.3°W Meteo-France reports that Tropical Cyclone Ava has reached its peak intensity, with 10-minute sustained winds of 155 kph and gusts up to 220 kph, as well as a minimum pressure of 965 mbar about 15 km north of Toamasina, Madagascar.
 * 12:00 UTC (4:00 p.m. UTC+04:00) at -11.9°N, 93.5°W Meteo-France reports that Zone of Disturbed Weather 02 has strengthened into a Tropical Disturbance about 1320 km southwest of Bengkulu, Indonesia.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -18.5°N, 48.9°W – Meteo-France reports that Tropical Cyclone Ava has made landfall about 60 km southwest of Toamasina, Madagascar, transitioning to an overland depression.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -12.4°N, 92.6°W Meteo-France reports that Tropical Disturbance 02 has intensified into a Tropical Depression about 1430 km southwest of Bengkulu, Indonesia.

6 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -12.6°N, 92.3°W Meteo-France reports that Tropical Depression 02 has strengthened into a Moderate Tropical Storm about 1470 km southwest of Bengkulu, Indonesia, and is named Irving by the Bureau of Meteorology.

7 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -22.8°N, 48.6°W 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 southeast of Manakara, Madagascar.
 * 06:00 UTC (10:00 a.m. UTC+04:00) at -13.8°N, 85.7°W – Meteo-France reports that Moderate Tropical Storm Irving has strengthened to a Severe Tropical Storm about 2460 km east-northeast of Rodrigues.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -15.7°N, 82.5°W Meteo-France reports that Severe Tropical Storm Irving has intensified to a Tropical Cyclone about 2070 km east-northeast of Rodrigues.

8 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -24.6°N, 49.1°W Meteo-France reports that Moderate Tropical Storm Ava has weakened to a Tropical Depression about 290 km south-southeast of Manakara, Madagascar.
 * 00:00 UTC (4:00 a.m. UTC+04:00) at -16.6°N, 81.3°W Meteo-France reports that Tropical Cyclone Irving has reached its peak intensity with wind speeds of 150 kph and a minimum pressure of 964 mbar about 1920 km east-northeast of Rodrigues.
 * 06:00 UTC (10:00 a.m. UTC+04:00) at -25.4°N, 49.3°W – Meteo-France reports that Tropical Depression Ava has strengthened back into a Moderate Tropical Storm about 235 km east of Tôlanaro, Madagascar.

9 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -28.8°N, 48.3°W Meteo-France reports that Moderate Tropical Storm Ava has transitioned to a post-tropical depression about 440 km south-southeast of Tôlanaro, Madagascar.
 * 06:00 UTC (10:00 a.m. UTC+04:00) at -21.2°N, 73.5°W Meteo-France reports that Tropical Cyclone Irving has degenerated to a Severe Tropical Storm about 1065 km east of Rodrigues.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -31.3°N, 49.5°W Meteo-France reports that Post-Tropical Depression Ava has dissipated about 740 km southeast of Tôlanaro, Madagascar.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -10.9°N, 68.9°W Meteo-France reports that Zone of Disturbed Weather 03 has formed about 1345 km east of Agaléga.

10 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -25.6°N, 69.1°W Meteo-France reports that Severe Tropical Storm Irving has transitioned to a Post-Tropical Depression about 880 km southeast of Rodrigues.

11 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -40.5°N, 75.9°W Meteo-France reports that Post-Tropical Depression Irving has dissipated about 2600 km southeast of Rodrigues.

12 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -16.1°N, 68.6°W Meteo-France reports that Zone of Disturbed Weather 03 has intensified to Tropical Disturbance 03 about 680 km northeast of Rodrigues.

13 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -17.5°N, 65.7°W Meteo-France reports that Tropical Disturbance 03 has strengthened into Tropical Depression 03 about 345 km northeast of Rodrigues.
 * 12:00 UTC (4:00 p.m. UTC+04:00) at -18°N, 64.5°W Meteo-France reports that Tropical Depression 03 has strengthened into a Moderate Tropical Storm about 220 km north-northeast of Rodrigues, receiving the name Berguitta.

14 January

 * 12:00 UTC (4:00 p.m. UTC+04:00) at -18°N, 63.1°W Meteo-France reports that Moderate Tropical Storm Berguitta has intensified to a Severe Tropical Storm about 190 km north of Rodrigues.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at 15.6°N, 42.2°W Meteo-France reports that Zone of Disturbed Weather 04 has formed about 255 km northeast of Angoche, Mozambique.

15 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -14.8°N, 41.7°W Meteo-France reports that Zone of Disturbed Weather 04 has strengthened into a Tropical Disturbance about 240 km northeast of Angoche, Mozambique.


 * 12:00 UTC (4:00 p.m. UTC+04:00) at -17.9°N, 63°W Meteo-France reports that Severe Tropical Storm Berguitta has rapidly strengthened into an Intense Tropical Cyclone about 205 km north-northwest of Rodrigues. It simultaneously reaches its peak intensity, with wind speeds of 165 kph and a minimum pressure of 940 mbar.
 * 12:00 UTC (4:00 p.m. UTC+04:00) at -15.3°N, 41.3°W Meteo-France reports that Tropical Disturbance 04 has strengthened into a Tropical Depression about 170 km northeast of Angoche, Mozambique, simultaneously reaching its peak intensity with winds of 45 kph and a minimum pressure of 999 mbar.

16 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -15.3°N, -40.4°W Meteo-France reports that Tropical Depression 04 has made landfall about 115 km north-northeast of Angoche, Mozambique, transitioning to an overland depression.


 * 06:00 UTC (10:00 a.m. UTC+04:00) at -18.1°N, 61.5°W Meteo-France reports that Intense Tropical Cyclone Berguitta has weakened to a Tropical Cyclone about 270 km northwest of Rodrigues.
 * 06:00 UTC (10:00 a.m. UTC+04:00) at -14.8°N, 39.8°W Meteo-France reports that Overland Depression 04 has dissipated over Mozambique about 155 km north of Angoche.

17 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -18.4°N, 60°W Meteo-France reports that Tropical Cyclone Berguitta has weakened to a Severe Tropical Storm about 330 km northeast of Mauritius.

19 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -23.2°N, 54.5°W Meteo-France reports that Severe Tropical Storm Berguitta has weakened to a Moderate Tropical Storm about 255 km south-southwest ofRéunion.

20 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -29.3°N, 49.6°W Meteo-France reports that Moderate Tropical Storm Berguitta has degenerated to a post-tropical depression about 255 km southeast of Tôlonaro, Madagascar.

24 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -39.4°N, 64.1°W Meteo-France reports that Post-Tropical Depression Berguitta has begun dissipating about 1945 km southeast of Tôlonaro, Madagascar.
 * 06:00 UTC (10:00 a.m. UTC+04:00) at -39.6°N, 65°W Meteo-France reports that Post-Tropical Depression Berguitta has dissipated about 2025 km southeast of Tôlonaro, Madagascar.

25 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -9.3°N, 80.2°W Meteo-France reports that Zone of Disturbed Weather 05 has formed about 2585 km east-northeast of Agaléga.

26 January

 * 12:00 UTC (4:00 p.m. UTC+04:00) at -10.3°N, 83.2°W Meteo-France reports that Zone of Disturbed Weather 05 has strengthened into a Tropical Disturbance about 2905 km east of Agaléga.

27 January

 * 06:00 UTC (10:00 a.m. UTC+04:00) at -11.1°N, 85°W Meteo-France reports that Tropical Disturbance 05 has intensified into a Tropical Depression about 3100 km east of Agaléga.
 * 18:00 UTC (10:00 p.m. UTC+04:00) at -11.7°N, 84.7°W Meteo-France reports that Tropical Disturbance 05 has intensified into a Moderate Tropical Storm about 3065 km east-southeast of Agaléga. It is subsequently named Cebile.

28 January

 * 00:00 UTC (4:00 a.m. UTC+04:00) at -12.5°N, 84.4°W – Meteo-France reports that Moderate Tropical Storm Cebile has rapidly intensified into a Severe Tropical Storm about 3035 km east-southeast of Agaléga.
 * 06:00 UTC (10:00 a.m. UTC+04:00) at -13.1°N, 84°W – Meteo-France reports that Severe Tropical Storm Cebile has rapidly intensified into a Tropical Cyclone about 2995 km east-southeast of Agaléga.
 * 12:00 UTC (4:00 p.m. UTC+04:00) at -13.8°N, 83°W Meteo-France reports that Tropical Cyclone Cebile has rapidly intensified into an Intense Tropical Cyclone about 2890 km east-southeast of Agaléga.


 * 18:00 UTC (10:00 p.m. UTC+04:00) at -14.1°N, 82.7°W Meteo-France reports that Intense Tropical Cyclone Cebile has reached its peak intensity, with 10-minute sustained winds of 185 km/h and a minimum pressure of 944 mbar about 2140 km east-southeast of Rodrigues.

29 January

 * 18:00 UTC (10:00 p.m. UTC+04:00) at -15.7°N, 80.7°W Meteo-France reports that Intense Tropical Cyclone Cebile has weakened to a Tropical Cyclone about 1885 km east-southeast of Rodrigues.