Météo-France's meteorological office in Réunion (MFR) is the official Regional Specialized Meteorological Center for the South-West Indian Ocean, tracking all tropical cyclones from the east coast of Africa to 90° E.[1] The agency tracked 18 tropical disturbances, including one zone of disturbed weather that lasted for one advisory, which was higher than normal.

During this time, the Intertropical Convergence Zone was located farther south than usual, causing any developing storms to reach their peak intensity at higher latitudes.

The exception was southern Madagascar, which was affected by Cyclone Ernest and Tropical Storm Felapi in a five-day span in late January.

Moving westward, the disturbance had an organized area of thunderstorms near the center, with favorable conditions provided by the subtropical ridge.

On October 29, the weak disturbance moved ashore in eastern Tanzania near Dar es Salaam, dropping heavy rainfall.

[8] The near-equatorial trough spawned an area of convection east of Diego Garcia on November 6, which the MFR classified as a tropical disturbance.

Late on November 8, the MFR estimated peak winds of 110 km/h (70 mph), making Arola a severe tropical storm.

The storm turned to a westward drift, entering an area of higher wind shear and cooler waters, which caused Arola to weaken.

[9] A day later, the MFR classified the system as a tropical disturbance as the thunderstorms organized and consolidated, amid favorable conditions.

On November 24, the cyclone began weakening due to an eyewall replacement cycle, as well as the presence of drier air and increased wind shear.

The JTWC discontinued advisories on November 29, but the MFR continued tracking the system as a tropical disturbance until December 3, when Bento was passing north of the Mascarene Islands.

On December 25, the MFR upgraded Chambo to tropical cyclone status, and the next day estimated peak 10 minute winds of 155 km/h (95 mph).

[3] An area of convection developed west of Diego Garcia on January 16, prompting the MFR to classify it as Tropical Disturbance 8.

[2] Madagascar's National Emergency Centre deployed workers to do search and rescue missions and provide water to storm victims.

[19] The World Food Programme provided 45 tons of rice to affected residents, although persistent flooding disrupted relief work.

The nascent system intensified into Tropical Storm Daren on January 19, reaching peak 10 minute winds of 95 km/h (60 mph) that day according to the MFR.

[3][21] Three days after Cyclone Ernest exited the Mozambique Channel, an area of convection developed in the region, which the MFR classified as a tropical disturbance on January 26.

The system moved west-southwestward, with its circulation displaced from the thunderstorms due to strong wind shear and cooler air.

On February 2, thunderstorm activity increased as the system passed over Rodrigues, although the structure resembled a monsoon depression more commonly found in the Western Pacific Ocean.

[23][4][2] In the report to the WMO, the MFR noted that "for a tropical depression system of such intensity not to be named is unprecedented in the recent history of the basin.

On the next day, the MFR upgraded the disturbance to a tropical depression, and the Mauritius Meteorological Services named the system Hennie due to the threat to the Mascarene Islands.

That day, the MFR estimated peak 10 minute winds of 100 km/h (60 mph), making Hennie a severe tropical storm.

[25][4][26] The storm dropped heavy rainfall in the Mascarene Islands, including a 24-hour precipitation total of 397 mm (15.6 in) in the mountainous peaks of Réunion.

On April 3, the thunderstorms increased and organized around the center, prompting the MFR to upgrade the system to Moderate Tropical Storm Isang.

That day, the JTWC initiated advisories on Tropical Cyclone 25S, located south of Diego Garcia and northeast of Rodrigues.

Soon after reaching peak intensity, Isang encountered stronger wind shear and cold, dry air, which resulted in weakening.

On April 9, the MFR upgraded Juliet to a very intense tropical cyclone, estimating peak 10 minute winds of 220 km/h (135 mph).

[33] After passing Rodrigues, the cyclone weakened due to drier air, cooler waters, and higher wind shear, causing the circulation to become exposed from the convection.

[28][31] In late November, the precursor low that would become Cyclone Agni in the North Indian Ocean briefly crossed the equator and entered the basin to reach approximately 0.5° S, keeping its counter-clockwise circulation.

For two days the system drifted westward before turning back to the east, reaching a point northeast of Mauritius on February 13.