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;
1998–99 South-West Indian Ocean cyclone season
During an extended period of quiet conditions across much of the basin, an area of low pressure persisted along the eastern coast of Mozambique. Convection fluctuated daily but became more persistent on February 11. That day, the thunderstorms organized into a circulation that had formed less than southeast of Beira, Mozambique, becoming Tropical Disturbance D1. After forming, the system moved southward, developing a central dense overcast with northeasterly outflow. Based on the organization, the disturbance intensified into a tropical depression on February 13. Although there were gale-force winds in the southwest periphery, the circulation was located on the northern edge of the convection. The depression neared tropical storm intensity, but an increase in wind shear from a nearby trough prevented further intensification. The JTWC estimated peak 1-minute winds of 85 km/h (50 mph), making the system a tropical storm by their assessment. A building ridge to the south turned the depression to the northeast, bringing the system near Europa Island. A station on the island recorded sustained winds of with gusts to about three hours before and after the closest approach; the observations suggested that the depression could have become a tropical storm. Soon thereafter, the associated convection dissipated and the circulation turned westward. After crossing over its former path, the depression dissipated on February 17 very close to where it developed.