After emerging into the Pacific Ocean, the system intensified into a Category 3 severe tropical cyclone, before it rapidly degenerated into a subtropical low during February 1.

[2] During January 26, the Fiji Meteorological Service (FMS) reported that Tropical Disturbance 05F had developed within the South Pacific convergence zone about 220 km (135 mi) to the northeast of Port Vila in Vanuatu.

[8] The United States Joint Typhoon Warning Center subsequently initiated advisories, on the newly named system and designated it as Tropical Cyclone 15P.

[4] During January 30, Ana continued to move south-southeastwards and passed through the northern Yasawa Islands into the Bligh Waters, where it became slow-moving and intensified into a category 2 tropical cyclone.

[9] The system subsequently continued to develop with an eye feature appearing on both radar and microwave imagery, before it made landfall on Viti Levu near Rakiraki at around 18:00 UTC (06:00 FST, January 31).

[9][10][11] While located over Viti Levu, Ana moved south-southeastwards over the Central Division, where it passed in between Navua and Fiji's capital city: Suva.

[12][13] During February 1, the system rapidly weakened into a subtropical low, as its low-level circulation center became exposed and moved south-eastwards into an area of high vertical wind shear.

[18] In Fiji, the put a Tropical Cyclone Alert in effect for Vanua Levu, Yasawa, and Mamanuca, as well as smaller nearby islands.