cyclone to strengthen, and TCWC Brisbane upgraded it to Tropical Cyclone Des at 0900 UTC on the same day with peak winds of . At the time of upgrade, Des was located only west of 160°E, near the border between Brisbane's and Nadi's respective areas of responsibility. Warnings were issued by RSMC Nadi thereafter as the cyclone continued to move to the southeast; see 2001–02 South Pacific cyclone season. Severe Tropical Cyclone Dianne–Jery Cyclone Dianne formed after a long period of cyclone inactivity off northwestern Australia and in the Southeast Indian Ocean since Cyclone Chris in early February. On 4 April 2002 an area of convection developed northeast of Cocos (Keeling) Islands. The system intensified under favourable conditions and outflow improved over the storm. The Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on 6 April for the system, and upgraded it to Tropical Cyclone 21S on 7 April, when convection deepened rapidly over the storm. It moved west-southwestward, influenced by a mid-level ridge which extended from the Australian west coast. As the cyclone edged closer to the Cocos Islands, a cyclone warning was issued by the Tropical Cyclone Warning Centre in Perth for possible gale-force winds developing over the islands. TCWC Perth issued its first gale warning for the developing cyclone at 0300 UTC on 7 April, and upgraded it to Tropical Cyclone Dianne just two hours later with peak winds of . Although Dianne passed about 30 km south of the islands, no gale-force winds were reported there. Dianne moved away from the Cocos Islands, and intensified further, developing a banding eye feature. Early on 8 April, the JTWC upgraded Dianne from tropical storm to tropical cyclone status with peak winds of , equivalent to a minimal hurricane. Later that day, TCWC Perth followed suit, upgrading Dianne to a Category 3 severe tropical cyclone with peak winds of . Dianne continued moving to the west-southwest and crossed the boundary at 90°E into La Réunion's area of responsibility and was renamed Tropical Cyclone Jery by the Mauritius Meteorological Service; see 2001–02 South-West Indian Ocean cyclone season. Tropical Cyclone Bonnie An area of convection formed northeast of Darwin, Northern Territory on 7 April. An increase in deep convection occurred late on 9 April, with the Joint Typhoon Warning Center (JTWC) issuing a Tropical Cyclone Formation Alert for the developing system. At this time, the Tropical Cyclone Warning