[2] On October 12, 2012, the JTWC issued a Tropical Cyclone Formation Alert (TCFA) on a system near the Chagos Islands.

[3] Soon afterwards, RSMC La Réunion designated the system as a tropical disturbance while located roughly 70 nautical miles (130 km) to the west of Diego Garcia.

[5] The next day, RSMC La Réunion reported that the system had intensified into a moderate tropical storm and named it Anais.

[9] On October 17, the system weakened into a tropical storm, and the low-level circulation center became totally exposed, with convection being displaced to the south due to moderate vertical wind shear from the north west.

[citation needed] On October 14, Anais became the earliest intense tropical cyclone in the South-West Indian Ocean.

[14] Early on November 15, the disturbance regained strength and the convective banding around its LLCC improved and JTWC resumed tracking the system.

[22] On November 25, the storm encountered strong vertical wind shear and much of its convection got displaced to the southeast, partially exposing the center.

By December 11, Claudia's eye had dissipated, and the cyclone became more disorganized, with wind shear causing elongation from east to west.

Claudia moved into sea surface temperatures below 80 °F (27 °C), as a result of the western edge of a high pressure ridge steering the system south.

[36][37] Transportation across the region was several disrupted as public transit was shut down and many roads were blocked by debris.

[37] Cyclone Dumile produced strong winds across Réunion Island, peaking at 180 km/h (110 mph), that downed numerous trees and power lines, leaving approximately 125,000 residents without electricity.

[39] These rains proved to be mostly beneficial, restoring reservoirs and replenishing rivers, as the island experienced below-average rainfall in the preceding two months.

At that time, the disturbance was located west of an upper-level anticyclone and directly beneath a subtropical ridge center, in an area of light vertical wind shear, 805 km (500 mi) north-northwest of Learmonth, Australia.

[43] On December 30, the low-level circulation center became partially exposed due to moderate to strong easterly moving vertical wind shear, while the western part of the system still had deep, persistent convection.

[45] On January 18, an elongated, poorly organized area of convection associated with the remnants of Tropical Storm Emang lingered near the ITCZ.

[51] By February 3, Felleng became fully extratropical, with the low level circulation center becoming totally exposed and elongated, under vertical wind shear, located to the west of the remnant convection.

[52] Although the center of Cyclone Felleng remained offshore, heavy rain from the storm's outer bands triggered significant flooding in parts of Madagascar.

[57] On 11 February, RSMC La Réunion announced that a Tropical Depression had formed about 760 mi (1,225 km) ESE of Diego Garcia.

At that time, Gino was centered near 17.1 south latitude and 79.5 east longitude, about 700 nmi (1,300 km; 810 mi) southeast of Diego Garcia.

The system shifted southward after exiting the coast of Mozambique and slowed to a drift in response to a break in the subtropical ridge.

[62] The structure of Haruna continued to become more symmetrical with a large radius of maximum winds, developing a ragged eye early on February 20.

[64] That day, an approaching trough weakened the ridge to the south, causing the cyclone to slow and move erratically.

[68] At 1200 UTC on February 24, MFR issued its last advisory after Haruna began losing tropical characteristics, designating it as a subtropical depression.

[69] The next day, the JTWC also discontinued advisories on the storm, noting that Haruna was dissipating about 665 km (415 mi) south-southwest of Réunion.