Severe Tropical Cyclone Sina was the only named tropical cyclone Catastrophe to develop Coming_to_be within the South Pacific basin during the 1990–91 season .

Sina subsequently peaked Cause_change_of_position_on_a_scale in intensity during November 26 , before the system passed Motion_directional through the Fijian Islands over the next two days as it started Process_start to gradually weaken Cause_change_of_strength .

Sina subsequently passed Motion_directional just to the north of Tongatapu in Tonga during November 29 , before it passed Motion_directional about 160 km ( 100 mi ) to the south of Niue and near the Southern Cook Islands during the next day .

As Sina moved Motion through the archipelago , the system destroyed Destroying or damaged Damaging houses and other building structures , while bringing Bringing down electric and telephone lines and uprooting Destroying trees .