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;
1901 Atlantic hurricane season
Tropical cyclogenesis began with the development of the first tropical storm on June 11 in the northwestern Caribbean Sea. July featured two tropical storms, one of which strengthened into a hurricane. By July 5, the season had three tropical storms. In comparison, the average date of development of the first tropical storm between 1944 and 1996 was July 11. August was the most active month of the season. There were four tropical storms, three of which intensified into hurricanes. The fourth system was the most intense tropical cyclone of the season, peaking as a Category 1 hurricane with maximum sustained winds of 90 mph (150 km/h) with a minimum barometric pressure of . Although the seventh cyclone was a Category 2 hurricane with winds of 105 mph (165 km/h), a lower minimum barometric pressure was not recorded. In September, three additional system formed, one of which became a hurricane. October featured the same amount of activity, but also had a short-lived tropical depression. The season's final system developed on October 30 and transitioned into an extratropical cyclone on November 5.