Toward the beginning of October, an area of low pressure persisted near Diego Garcia, while a strong anticyclone stretched from Madagascar to Île Amsterdam.

On October 9, Diego Garcia reported westerly winds and falling pressure,[1] indicating that a tropical cyclone developed that day.

Gradual intensification occurred, aided by the anticyclone to the south,[1] and Amy reached peak winds of around 75 km/h (45 mph) on October 10.

[1] At the end of November, an area of low pressure persisted near Diego Garcia, associated with the Intertropical Convergence Zone (ITCZ).

On December 1, the low pressure area was confirmed to have developed into Tropical Storm Bertha while near the Mascarene Islands.

[7] Delia originated near Diego Garcia and moved southwestward, passing north of St. Brandon, east of Madagascar, and west of Réunion.

[9] According to the MFR, Emma was a short-lived tropical storm that persisted southeast of Rodrigues,[10] although other warning agencies tracked it for much longer, following it from the Australian basin for 12 days.