A tropical low east of Timor developed into a tropical cyclone at about 0200 WST on 10 April and was named Bonnie by the Darwin Tropical Cyclone Warning Centre (TCWC). The system initially moved to the southwest into the Perth TCWC's area of responsibility and passed over the southern tip of Timor between 2000 WST 10 April - 0200 WST 11 April. Bonnie then moved westwards passing over the island of Sambu on 11 April and weakening below tropical cyclone intensity temporarily between 1400 WST- 2000 WST on 11 April. Bonnie then re-intensified over the next 15 hours reaching maximum intensity on 12 April with maximum estimated mean winds of 85 km/h (45 knots). The system then weakened under increasing shear but remained a weak cyclone until about 1400 WST on 14 April.
Track and intensity
All times in WST - subtract 8 hours to convert to UTC.