[5] On November 27, New Zealand's National Institute of Water and Atmospheric Research (NIWA), issued a press release, which predicted that because of the strong El Niño phenomenon, there would be more tropical cyclones than average.
[6] NIWA also reported that Cyclone Martin's impact on the Northern Cook Islands was an early sign of what could be expected during the season, because the system had occurred further east than normal.
[10] Severe Tropical Cyclone Martin impacted the Cook Islands and French Polynesia, where it caused significant damage and 28 deaths during the opening days of the season.
[1] However, due to uncertainties in the continuation of Tui after several other weak low-pressure areas had formed, the FMS decided to treat the cyclone as a separate system and named it Wes.
[13] Tropical Cyclone Bart developed during the final days of the season and caused ten deaths and minor damage to French Polynesia, before it dissipated during May 3.
[10][17][18] The FMS subsequently named the depression Lusi during the next day, as the system had intensified into the earliest tropical cyclone since 1970, while located about 1020 km (635 mi) to the northwest of Port Vila, Vanuatu.
[9] During October 10, the JTWC reported that Lusi had peaked with 1-minute sustained wind speeds of 110 km/h (70 mph), while the system was located about 570 km (355 mi) to the northwest of Port Vila, Vanuatu.
[16] After it had peaked in intensity Lusi started to weaken in an area of cooler sea surface temperatures, while vertical wind shear increased because of a mid-level trough and strong north-westerlies.
[9] When it was named, Martin was located about 500 km (310 mi) to the west of Manihiki Atoll in the Northern Cook Islands and had started to re-curve and move towards the south-east during that day.
[1][27] During the next day, Martin passed near the Society Islands as it developed an 17 km (10 mi) eye, before the FMS reported at 06:00 UTC that the system had peaked as a category 3 severe tropical cyclone with 10-minute sustained wind speeds of 155 km/h (100 mph).
[9][33] During that day, the depression was steered south-westwards by the subtropical ridge of high pressure and encountered an area of increasing upper-level divergence and favourable sea surface temperatures.
[33][34] Later that day at around 09:00 UTC, the JTWC initiated advisories on the system and designated it as Tropical Cyclone 05P, after satellite imagery showed that the depression had a well defined low-level circulation and atmospheric convection had become better organized.
[35] This was followed 3 hours later by the FMS who reported that the system had developed into a Category 1 tropical cyclone and named it Nute, while it was located about 835 km (520 mi) to the north-west of Port Vila in Vanuatu.
[11] Over the next day, the newly named system continued to intensify and developed an eye feature, before the FMS reported that Nute had peaked as a Category 2 tropical cyclone with 10-minute sustained wind speeds of 110 km/h (70 mph) at around 0600 UTC on November 19.
[37][38] At around the same time, the FMS passed the primary warning responsibility for Nute to the BoM, after it had moved into the Australian region, where it dissipated to the west of New Caledonia on November 21, after encountering dry air and increased vertical wind shear.
[9][39] While it was active, Osea caused no deaths but was quite destructive to some of the northwestern Society Islands, with over 700 homes destroyed or severely damaged on Maupiti, Bora-Bora, and Raiatea.
[50] As the system passed near Suwarrow, the NPMOC reported that Pam had reached its peak intensity with 1-minute sustained wind speeds of 120 km/h (75 mph), which made it equivalent to a Category 1 hurricane on the SSHWS.
[52] Over the next couple of days, the system moved southwards before the FMS reported during December 8, that Pam had peaked as a Category 3 severe tropical cyclone with 10-minute sustained wind-speeds of 120 km/h (75 mph).
[58] During the day, the system continued to rapidly intensify with the FMS reporting early on January 4 that Susan had become a Category 3 severe tropical cyclone, with 10-minute sustained winds of 120 km/h (75 mph).
[9] The system was steered south-westwards by a high-pressure area and gradually organized as its outflow improved,[63][64] reaching Category 3 Severe Tropical Cyclone status during January 3, as it passed about 20 km (10 mi) to the north of Swains Island.
[9][55][83] After Tui was downgraded to a depression, a weak circulation remained in the vicinity of the Samoan islands for several days, before it possibly redeveloped into Tropical Cyclone Wes.
[1][87] In association with Tropical Cyclone Veli, Ursula brought significant waves which caused minor damages to three Tuamotuan islands of Mataiva, Rangiroa, Makatea.
[89][90] Later that day the FMS named the system Veli as it had intensified into a category 1 tropical cyclone, while it came under the influence of a mid level trough of low pressure and started to move towards the southeast.
[89] In association with Tropical Cyclone Ursula, Veli brought significant waves to French Polynesia's Tuamotu province and caused minor damages on the islands of Mataiva, Rangiroa, Makatea.
[88] On January 31, the FMS reported that a tropical depression had developed within the South Pacific Convergence Zone, about 230 km (145 mi) to the northwest of the American Samoan island of Apia.
[114] The system subsequently moved eastwards over the next couple of days and gradually developed further with automatic weather stations reporting strong winds and significant pressure drops.
[105][115] The FMS reported during the next day that Bart had reached its peak 10-minute sustained windspeeds of 85 km/h (50 mph), as the system slowed down due to a blocking ridge of high pressure strengthening.
[115][116] However, by this time Bart had started to weaken, before on May 1, satellite imagery showed that the systems, low level centre had become exposed as the main area of convection had become sheared.
[9] Despite gale-force wind speeds occurring in Bart's southern semicircle, the system weakened into a tropical depression during May 1, before it dissipated to the north of Pitcairn Island on May 3.
[13] Over the next couple of days the depression moved westwards slowly before the centre was relocated late on February 13 to a position about 185 km (115 mi) to the south-southeast of Nassau Island.