1999–2000 South-West Indian Ocean cyclone season
The same monsoon trough that spawned Connie also produced an area of convection southeast of Diego Garcia on January 28. The circulation slowly organized, and the MFR classified it as a tropical disturbance on January 30. A nearby trough steered the system southeastward initially and later to the southwest. On January 31, the system became a tropical depression, and later Moderate Tropical Storm Damienne the next day, reaching peak winds of 65 km/h (40 mph). Also on February 1, the JTWC initiated warnings on Tropical Cyclone 10S, which estimated 1‑minute winds of 95 km/h (60 mph). Increased wind shear removed the convection on February 2, causing marked weakening, and prompting the JTWC to discontinue advisories that day. This was despite forecasts of strengthening to near tropical cyclone status. As a weak tropical disturbance, Damienne turned to a rapid westward motion, passing north of Rodrigues and Tromelin. The circulation dissipated on February 7 off the northeast coast of Madagascar.
On February 1, a low-pressure area formed within the monsoon trough to the south of Indonesia, which would eventually become Tropical Cyclone Leon in the Australian basin, as well as Tropical Cyclone 11S according to JTWC. The storm tracked westward across much of the Indian Ocean, fluctuating in strength due to changes in the atmosphere. After crossing 90° E, the MFR began tracking the system as Tropical Storm Eline on February 8. The storm continued westward across the Indian Ocean and intensified greatly as it approached the east coast of Madagascar. Late on February 17, Eline made landfall near Mahanoro with 10‑minute winds of 165 km/h (105 mph), making it the strongest storm to hit the country in several decades. The storm rapidly weakened over land, but restrengthened in the Mozambique Channel to reach peak 10‑minute winds of 185 km/h (115 mph). On February 22, Eline made landfall about 80 km (50 mi) south of Beira, Mozambique near peak intensity and quickly weakened over land. The well-defined circulation moved across southern African, finally dissipating over eastern Namibia on February 29. Throughout its duration, Leon–Eline lasted 29 days, a record longevity for a storm in the south-west Indian Ocean. The track was over 11,000 km (6,800 mi), or about 25% of the Earth's circumference.
2000 Pacific typhoon season
The first storm of the season started out as a tropical low near Palau on May 3, when the JTWC first gave the system a poor chance of formation. However within the next few hours the low quickly organized, and the next day the JMA recognized the low as a depression. Operationally it wasn't until May 5 that the JTWC issued its first warning for the newly formed depression. Drifting northwest the depression gradually organized into a tropical storm on May 6. It was given the name Asiang on May 6 by PAGASA and Damrey on May 7 by the JMA, respectively. At this time a weakening sub-tropical ridge was moving northward causing Damrey to move in a northeasterly direction. Damrey became a typhoon early on May 8 and soon thereafter satellite images began to show an eye forming at the center. During the next 24 hours Damrey quite steadily intensified, reaching winds of 130 mph (215 km/h) by May 9. The system became very symmetrical and small, allowing the typhoon to reach a peak intensity of 180 mph (290 km/h) and gusts as high as 220 mph late on May 9. Due to the compact structure of the typhoon it would only take twenty-four hours of high vertical wind shear, from a nearby high pressure, to reduce Damrey to a tropical storm. The convection continue to decrease around the LLCC and the system picked up in forward momentum under deteriorating environment. By May 12 Damrey became fully extra-tropical and eventually dissipated on May 16.