1984–85 South-West Indian Ocean cyclone season

At the time, the MFR area of warning responsibility was from the coast of Africa to 80° E, and the agency primarily used the Dvorak technique to estimate the intensities of tropical cyclones.

[1] The Joint Typhoon Warning Center (JTWC), which is a joint United States Navy – United States Air Force task force that issues tropical cyclone warnings for the region,[2] also tracked a long-lived tropical storm in November in addition to the 8 storms MFR named,[3][4][5][6][7][8][9][10][11] which is comparable to the average of nine named storms per year.

[12] Following the season, the boundary for the basin was extended to 90° E.[13] According to the JTWC, a tropical depression formed on November 9 quite far from land.

After emerging into the Mozambique Channel, Anety reportedly re-intensified back to moderate tropical storm status.

While making its closest approach to the African mainland, the storm resumed weakening while turning back southeast.

[4][14] During the morning hours of December 2, a tropical cyclone developed in extreme western portion of the Australian basin.

After crossing the 80°E boundary that at that time separated the two basins the following day, MFR classified the system as a tropical depression.

That day, MFR reported that Moderate Tropical Storm Bobalahy had attained peak intensity of 45 mph (70 km/h).

After maintaining peak intensity for a day or so, Bobalahy resumed a southwesterly path far from land while slowly weakening.

By January 18, Celestina resumed a weakening trend; by that night, MFR downgraded the system into a tropical depression as it was now moving south-southwest.

[6] During its lifetime, Severe Tropical Storm Celestina brought rains to Reunion, peaking at 600 mm (25 in) in Trois-Bassins.

Around this time, Ditra made its closet approach to Reunion, passing about 150 mi (240 km) south-southeast of the island.

[16] On February 9, MFR first classified the system as a tropical depression about 400 mi (645 km) east of the northern tip of Madagascar.

[8] On February 11, MFR reported that a moderate tropical storm formed over 700 mi (1,125 km) east of Reunion.

The storm erratically drifted south for the two days when the JTWC declared the system a tropical depression.

The next day, the JTWC reported that the storm intensified into a hurricane even though MFR suggests that the system was just a disturbance by that time.

Not long after becoming a hurricane, the JTWC remarked that Cyclone Gerimena had attained peak intensity.

Furthermore, the JTWC stopped keeping an eye on Gerimena at 0000 UTC on February 26 as the storm re-curved east.

MFR reported that the system regained moderate tropical storm intensity at 1800 UTC that day.

That night Feliska was re-upgraded into a moderate tropical storm as it made landfall along northeastern Madagascar.

After moving inland, MFR stopped monitoring the system, though the JTWC kept tracking Feliska for another 24 hours as it headed southeast.

Two days after becoming a severe tropical storm, on April 13, the JTWC upgraded Helisaonina to the equivalent to a Category 3 hurricane.

While undergoing a counterclockwise loop, the JTWC reported that Cyclone Helisaonina had peaked in intensity with 120 mph (195 km/h) winds.