▁The ▁ 1 9 4 5 ▁Pacific ▁ty ph oon ▁season ▁was ▁the ▁first ▁official ▁season ▁to ▁be ▁included ▁in ▁the ▁West ▁Pacific ▁ty ph oon ▁database . ▁It ▁has ▁no ▁official ▁bounds ; ▁it ▁ran ▁year - round ▁in ▁ 1 9 4 5 , ▁but ▁most ▁tropical ▁cycl ones ▁tend ▁to ▁form ▁in ▁the ▁north western ▁Pacific ▁Ocean ▁between ▁June ▁and ▁December . ▁These ▁dates ▁convention ally ▁del imit ▁the ▁period ▁of ▁each ▁year ▁when ▁most ▁tropical ▁cycl ones ▁form ▁in ▁the ▁north western ▁Pacific ▁Ocean . ▁ ▁The ▁scope ▁of ▁this ▁article ▁is ▁limited ▁to ▁the ▁Pacific ▁Ocean , ▁north ▁of ▁the ▁equ ator ▁and ▁west ▁of ▁the ▁international ▁date ▁line . ▁Storm s ▁that ▁form ▁east ▁of ▁the ▁date ▁line ▁and ▁north ▁of ▁the ▁equ ator ▁are ▁called ▁h urr ican es ; ▁see ▁ 1 9 4 5 ▁Pacific ▁h urr icane ▁season . ▁Trop ical ▁Storm s ▁formed ▁in ▁the ▁entire ▁west ▁pac ific ▁bas in ▁were ▁assigned ▁a ▁name ▁by ▁the ▁J oint ▁Ty ph oon ▁Warning ▁Center . ▁Trop ical ▁de press ions ▁in ▁this ▁bas in ▁have ▁the ▁" W " ▁suffix ▁added ▁to ▁their ▁number . ▁Trop ical ▁de press ions ▁that ▁enter ▁or ▁form ▁in ▁the ▁Philipp ine ▁area ▁of ▁responsibility ▁are ▁assigned ▁a ▁name ▁by ▁the ▁Philipp ine ▁At mos pher ic , ▁Ge oph ys ical ▁and ▁Astronom ical ▁Services ▁Administration ▁or ▁P AG AS A . ▁This ▁can ▁often ▁result ▁in ▁the ▁same ▁storm ▁having ▁two ▁names . ▁