These dates conventionally delimit the period of each year when most tropical cyclones form in the basin, which is west of 90°E and south of the Equator.

However, later that day, the Joint Typhoon Warning Center (JTWC) assessed the chances of the low developing into a tropical cyclone as "fair".

[3] In the post-storm report issued by the Australian Bureau of Meteorology, the system was estimated to have become a Category 1 cyclone, with winds peaking at 75 km/h (45 mph), shortly before leaving Météo-France's area of responsibility early on July 29.

The disturbance featured persistent convection around an elongated low level circulation located about 600 kilometres (370 mi) west-northwest of Diego Garcia.

[9] Despite favorable upper-level conditions and low wind shear, the disturbance was situated over cool sea-surface temperatures which provided little energy to fuel convective activity.

[9][10] On November 13, the Australian Bureau of Meteorology (BoM) began monitoring a tropical low situated about 835 km (519 mi) northwest of the Keeling Islands.

[16] Roughly six hours later, the JTWC assessed Lee–Ariel to have reached its peak intensity with winds of 110 km/h (68 mph) 1-minute sustained),[17] based on the development of an eye-like structure.

[23] The remnants of the system persisted for another ten days, completing an erratic counter-clockwise loop before taking a general westward direction.

The system slowly organised as it moved southeastward and began interacting with Severe Tropical Storm Ariel, and the JTWC issued a TCFA on November 17.

[46] On December 20, the remnant low of Celina passed about 60 km (37 mi) southwest of Reunion, producing heavy rains over the island.

Some areas received 114 millimetres (4.5 in) of rain in the span of three hours, with the highest total amounting to 374 mm (14.7 in) in La Plaine des Chicots.

[47] An area of disturbed weather begin developing east of 90°E near Cocos Island, eventually crossing into the southwestern Indian Ocean early on December 17.

[52] However, the next day, decreasing wind shear allowed convection to form closer to the center for 05R to reclassify as a moderate tropical storm status and earned the name "Dama.

[64] On January 3, Elnus passed about 75 km (47 mi) east of Europa Island, producing winds up to 57 km/h (35 mph) along with a pressure of 997 hPa (mbar).

[67] On January 6, the JTWC began monitoring an exposed low-level circulation located about 695 km (432 mi) north of Réunion traveling towards the south.

[70] Although convection began to decrease by January 8, due to increasing wind shear,[71] Météo-France redesigned the system as a tropical disturbance.

At this time, the disturbance was assessed to have reached its peak intensity with winds of 35 km/h (20 mph) with a minimum pressure of 1003 hPa (mbar).

[76] However, Fame did not strengthen further due to interaction with Cyclone Gula, and after being declared extratropical,[77] Météo-France redeclared the system tropical and issued its last advisory.

A peak wind gust of 112 km/h (70 mph) was recorded at Gros Piton Ste-Rose[47] An area of disturbed weather formed over the south-central Indian Ocean in the fourth week of January.

[82] After weakening and oscillating between severe and moderate tropical storm status,[78][83][84][85] Météo-France declared it an extratropical depression,[86] and then issued its last advisory on February 2.

[90] The cyclone gradually weakened over the next several days due to an increase in forward speed and a decrease in sea surface temperatures.

[47] Early on February 7, an area of disturbed weather northeast of Madagascar, heading southeast, was designated Tropical Depression 11R.

[114] At noon on March 6, after a bout of rapid intensification, Jokwe was upgraded to a tropical cyclone, skipping severe storm status.

[126] Shear had been steadily increasing, and on March 13 Jokwe's movement slowed down drastically; it moved around the same general area of ocean and weakened.

[137] Wind shear continued to impact the organization of the system as the eastern portion of the storm remained partially exposed.

[133] Not long after being upgraded to a severe tropical storm, the JTWC estimated that Kamba had strengthened into the equivalent of a Category 1 hurricane with winds of 120 km/h (75 mph).

[134] Early on March 10, Kamba began to undergo rapid intensification and Météo-France upgraded the storm to a tropical cyclone as an eye developed.

[142] By March 11, Kamba began to move over cooler waters and into an area of higher wind shear, causing the storm to deteriorate.

[143] About 24 hours after reaching peak intensity, the storm began to undergo an extratropical transition and weakened to a tropical cyclone.

[151] The system became Moderate Tropical Storm Lola early March 22 based on it having gale-force winds in the southern quadrant far away from the center and due to it having deep convection.