▁tropical ▁wave ▁formed ▁in ▁the ▁South ▁West ▁Indian ▁Ocean . ▁Two ▁days ▁later , ▁the ▁tropical ▁wave ▁organized ▁into ▁a ▁low ▁pressure ▁area , ▁due ▁to ▁favor able ▁conditions . ▁On ▁June ▁ 5 , ▁the ▁low ▁pressure ▁area ▁was ▁upgrad ed ▁to ▁a ▁tropical ▁disturb ance ▁by ▁M été o - France , ▁ 4 0 0 ▁miles ▁( 6 4 0   km ) ▁E NE ▁of ▁the ▁Ag al ég a ▁Islands , ▁and ▁later ▁to ▁a ▁tropical ▁de pression . ▁On ▁June ▁ 6 , ▁J TW C ▁designated ▁it ▁as ▁Trop ical ▁Cy clone ▁ 2 0 S , ▁with ▁the ▁Maur it ius ▁We ather ▁Service ▁upgrad ing ▁it ▁to ▁a ▁moder ate ▁tropical ▁storm ▁naming ▁it ▁" K u ena " ▁soon ▁afterwards . ▁Later , ▁on ▁the ▁same ▁day , ▁the ▁storm ▁was ▁upgrad ed ▁to ▁a ▁severe ▁tropical ▁storm ▁by ▁M FR . ▁On ▁June ▁ 7 , ▁dry ▁air , ▁and ▁moder ate ▁vertical ▁wind ▁she ar ▁caused ▁the ▁system ' s ▁low ▁level ▁circul ation ▁center ▁to ▁become ▁exposed . ▁So on ▁afterwards , ▁Ku ena ▁began ▁to ▁weak en . ▁Late ▁on ▁June ▁ 7 , ▁R S MC ▁La ▁Ré union ▁issued ▁their ▁last ▁advis ory ▁on ▁Ku ena , ▁as ▁the ▁storm ▁weak ened ▁to ▁a ▁rem nant ▁low . ▁ ▁Ku ena ▁was ▁one ▁of ▁the ▁most ▁off - season ▁storm s ▁ever ▁recorded , ▁forming ▁approximately ▁ 2 ▁months ▁after ▁the ▁official ▁end ▁of ▁the ▁season .