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Cyclone Ian

Tropical cyclone

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  • 3 chapters

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Meteorological history

During January 2, 2014 the Fiji Meteorological Service's Regional Specialized Meteorological Center in Nadi, Fiji (RSMC Nadi) reported that Tropical Disturbance 07F had developed to the southeast of Futuna Island. Over the next day the system gradually developed further underneath an upper level ridge of high pressure, within an area of moderate vertical wind shear, as it slowly moved towards the southwest. RSMC Nadi subsequently classified the disturbance as a tropical depression early on January 4, as the systems low level circulation centre consolidated. Over the next day the system continued to move towards the southwest, before the United States Joint Typhoon Warning Center designated the system as Tropical Cyclone 07P late on January 5. At around this time RSMC Nadi named the system Ian, after it had become a category 1 tropical cyclone on the Australian tropical cyclone intensity scale.

Early on January 8, RSMC Nadi reported that Ian had become a category two tropical cyclone. During that day the systems organization significantly improved with RSMC Nadi reporting at 18:00 UTC that Ian had become a category three severe tropical cyclone. Over the next day the system developed a cloud filled eye and intensified into a category 4 severe tropical cyclone. On January 12, as Ian started to weaken RSMC Nadi handed the primary warning responsibility, for issuing warnings over to the Wellington Tropical Cyclone Warning Center.

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