▁days ▁the ▁de pression ▁gradually ▁developed ▁further , ▁as ▁it ▁slowly ▁moved ▁south wards ▁due ▁to ▁a ▁weak ness ▁in ▁the ▁subt rop ical ▁r idge ▁of ▁high ▁pressure . ▁At ▁ 1 2 0 0   UTC ▁on ▁November ▁ 2 3 , ▁the ▁N P MO C ▁reported ▁that ▁the ▁de pression ▁had ▁become ▁equivalent ▁to ▁a ▁tropical ▁storm ▁and ▁assigned ▁it ▁the ▁design ation ▁ 0 6 P . ▁Tw elve ▁hours ▁later ▁R S MC ▁N adi ▁named ▁the ▁system ▁O se a ▁after ▁it ▁had ▁developed ▁into ▁a ▁Category ▁ 1 ▁tropical ▁cy clone ▁on ▁the ▁Australian ▁tropical ▁cy clone ▁intensity ▁scale . ▁There after , ▁O se a ▁started ▁moving ▁towards ▁the ▁sout heast , ▁as ▁an ▁area ▁of ▁high ▁pressure ▁started ▁to ▁develop ▁to ▁the ▁south ▁of ▁the ▁system . ▁ ▁During ▁November ▁ 2 5 , ▁R S MC ▁N adi ▁estimated ▁that ▁O se a ▁had ▁become ▁a ▁Category ▁ 3 ▁severe ▁tropical ▁cy clone , ▁while ▁the ▁N P MO C ▁announced ▁that ▁the ▁system ▁had ▁become ▁equivalent ▁to ▁a ▁Category ▁ 1 ▁h urr icane ▁on ▁the ▁S aff ir - Sim pson ▁h urr icane ▁wind ▁scale ▁as ▁it ▁moved ▁through ▁French ▁Pol yn esia . ▁The ▁next ▁day ▁both ▁ag ency ' s ▁reported ▁that ▁Se vere ▁Trop ical ▁Cy clone ▁O se a ▁had ▁reached ▁its ▁peak ▁intensity . ▁R S MC ▁N adi ▁reported ▁ 1 0 - min ute ▁sust ained ▁wind s ▁of ▁ 1 5