 Tropical Storm Mamie moved across the tropical western Pacific ocean , striking the Philippines and Vietnam during mid to late March . Nelson formed soon after Mamie , becoming the first typhoon of the season which subsequently moved westward through the southern Philippines before dissipating shy of Vietnam in late March . Odessa formed well out to sea , wandering across the western Pacific before dissipating in early April , ending the most active March since 1967 . Pat formed in mid May , approaching the Philippines before becoming an extratropical cyclone offshore Japan late in the month . Ruby wandered around the Marianas in late June , becoming an extratropical cyclone east of Japan . 
