Formed on 3 November, just south of Selat Mentawai then moved southwestward before reaching a peak intensity of 110 knots and a minimum pressure of on 8 November. On 12 November the storm began to move northwestward and two days later dissipated over the open Indian Ocean.
Severe Tropical Cyclone Bert-Christelle
The origins of Cyclone Bert-Christelle can be traced to a quasistationary convergence zone that spread across Indonesia to north of the Cocos Islands. Bert-Christelle was slow to organize but began to show signs of organization on November 26. Later on that day, the disturbance gained sufficient organization, noted by curved cloudbands, to be classified as Cyclone Bert. The cyclone moved to the southwest, gradually intensifying and attained a peak intensity of 150 km/h and a barometric pressure of 965 hPa on November 29. Bert continued the same westerly motion and exited the basin on December 3. It was subsequently named Christelle by Météo France.
Cyclone Carol formed from a weak area of low pressure to the southwest of Timor on December 12. While moving to the southwest, the disturbance developed banding features and was classified as Cyclone Carol. As Carol moved to the west, it intensified and peaked at 195 km/h with a barometric pressure of 940 hPa on December 16. Briefly, both Carol and Dan exhibited a Fujiwhara interaction around December 17 due to their close proximity to each other. Carol began to impart wind shear on nearby Cyclone Dan, ultimately leading to its demise. Carol continued its track, but encountered strong wind shear and rapidly weakened. Carol's low level center became decoupled and continued to the west, where it dissipated on December 24.
Tropical Cyclone Dan
Cyclone Dan formed from an area of convection situated north of the Cocos Islands in mid-December. The tropical low moved eastwards and curved to the southwest, coalescing to form Dan. Dan's track shifted abruptly to the northeast from interacting with Carol, attaining a peak intensity of 95 km/h and 985 hPa on December 16. Intensification quickly halted as strong upper-level flow from Cylone Carol to its south sheared its cloudtops off. Dan's low level circulation moved erratically to the south and passed within 140 km west of Christmas Island on December 17, where winds of 74 km/h were observed. Dan ultimately dissipated around 370 km to the south of Christmas Island on December 18. Cyclone Dan is notable in that it traveled generally towards the southeast for the duration of its existence, which is uncommon for cyclones in the area.
Cyclone Max developed from a low pressure system into a Category 1 cyclone in Van Diemen Gulf, off the Northern Territory Coast, on 11 March 1981. Moving west-southwest, it crossed over Darwin, Australialater that day, causing tree damage and flooding but minimal structural damage. It subsequently moved west into the Timor Sea and the Indian Ocean, and although intensifying to Category 3 and reaching a lowest pressure of, did not approach land again. Max was notable for being the first cyclone to pass overDarwin since the city was destroyed by Cyclone Tracy 6 years earlier. The name Max was not retired from the Northern Australia naming list.
