Afterwards, Osea began to weaken because of increased wind shear, and the cyclone started moving southeast.

[1][2] Over the next two days the depression gradually developed further, as it slowly moved southwards towards a weakness in a subtropical ridge of high pressure.

[1][3] At 1200 UTC on November 23, the NPMOC reported that the depression had become equivalent to a tropical storm and assigned it the designation 06P.

The next day both agency's reported that Severe Tropical Cyclone Osea had reached its peak intensity.

By November 27, the NPMOC had issued their final warning on the system because the convection had become dislocated over 185 km (115 mi) from the low-level circulation center due to increased wind shear.

[8] The FMS subsequently monitored Osea for another 24 hours, before it was last noted by the agency on November 28, around the time it degenerated into a tropical depression.

[1] The town hall was originally being used as an emergency shelter, but was later evacuated due to strong winds[12] and was later destroyed.

[16] Across Vaitape, roads were blocked by fallen trees and telecommunication lines were severed due to high winds.

[18] In addition to the impact on infrastructure, banana trees were knocked down due to the winds, especially in mountain gardens.

[15] President Gaston Flosse, accompanied by technicians, arrived in Maupiti to help repair the island's electrical and hydraulic systems.