1999–2000 South-West Indian Ocean cyclone season
The 1999–2000 South-West Indian Ocean tropical cyclone season was the first on record in which two storms – Leon–Eline and Hudah – struck Mozambique at tropical cyclone intensity, or with maximum sustained winds of at least 120 km/h (75 mph). The most notable storm of the season was Eline, which was the longest-lasting storm on record in the basin. It lasted for 29 days while traversing the southern Indian Ocean, making the strongest landfall in decades along eastern Madagascar in late February. The storm was the first in a series of three storms that struck the country in early 2000, along with Gloria in March and Hudah in April. Collectively, the three storms killed at least 316 people. The season started on November 1, 1999, and ended for most of the basin on April 30, 2000; for Mauritius and the Seychelles, the season continued until May 15. These dates conventionally delimit the period of each year when most tropical cyclones form in the basin;
1991–92 South-West Indian Ocean cyclone season
The final storm of the season formed in the Australian basin, and like Harriet-Heather also originated out of the monsoon trough. On April 7, a tropical low developed northeast of the Cocos Islands, and gradually intensified while moving southward, becoming Tropical Cyclone Jane the next day. The JTWC classified it as Tropical Cyclone 29S. A ridge to the south turned the storm to the west on April 11. The cyclone intensified further, developing an eye, and crossed into the south-west Indian Ocean on April 13. At that time, the MFR renamed Jane as Tropical Cyclone Irna. Late on April 13, the agency estimated peak 10‑minute sustained winds of 140 km/h (85 mph). The next day, the JTWC estimated Irna reached peak 1‑minute winds of 220 km/h (140 mph). Subsequently, an approaching trough turned the cyclone to the south and increased wind shear, which caused weakening. The eye dissipated, and Irna soon weakened below tropical cyclone status. On February 17, Irna weakened into a tropical depression. The next day, the JTWC discontinued advisories, and on April 19, Irna crossed back into the Australian region, dissipating on April 20.