ar ▁caused ▁the ▁system ▁to ▁weak en ▁again . ▁Late ▁on ▁February ▁ 2 2 , ▁Hil wa ' s ▁north western ▁structure ▁was ▁completely ▁she ared ▁as ▁the ▁storm ▁rapidly ▁deg ener ated ▁into ▁an ▁extr at rop ical ▁cy clone . ▁At ▁ 0 0 0 0 ▁UTC ▁on ▁February ▁ 2 3 , ▁Hil wa ▁completed ▁its ▁transition ▁into ▁an ▁extr at rop ical ▁cy clone ▁and ▁the ▁final ▁advis ory ▁for ▁the ▁storm ▁was ▁issued ▁several ▁hours ▁later . ▁ ▁Se vere ▁Trop ical ▁Storm ▁Ir ina ▁ ▁On ▁February ▁ 2 2 , ▁an ▁area ▁of ▁dist urbed ▁weather ▁formed ▁in ▁the ▁South - West ▁Indian ▁Ocean . ▁The ▁system ▁stead ily ▁strength ened ▁into ▁a ▁low ▁pressure ▁area ▁shortly ▁afterwards . ▁With ▁favor able ▁conditions , ▁am ple ▁con ve ction ▁was ▁able ▁to ▁wrap ▁around ▁the ▁low ▁level ▁circul ation ▁center , ▁which ▁allowed ▁the ▁system ▁to ▁strength en ▁into ▁a ▁tropical ▁de pression , ▁on ▁February ▁ 2 5 ,. ▁On ▁February ▁ 2 6 , ▁R S MC ▁La ▁Re union ▁upgrad ed ▁the ▁system ▁to ▁Mod er ate ▁Trop ical ▁Storm ▁Ir ina ▁as ▁it ▁continued ▁to ▁intens ify . ▁However , ▁Ir ina ▁made ▁land fall ▁on ▁Northern ▁Mad agas car ▁a ▁few ▁hours ▁later ▁and ▁weak ened ▁into ▁an ▁over land ▁de pression . ▁On ▁February ▁ 2 7 , ▁Ir ina ▁emer ged ▁off ▁the ▁north western ▁coast ▁of ▁Mad agas car . ▁Within ▁the ▁next ▁several ▁hours , ▁Ir