 The system subsequently moved south-eastwards towards the Fijian Islands, before it passed near or over Vanua Levu during April 16.After passing over Fiji, the system gradually developed further as it moved north-eastwards towards the Samoan Islands.The system was subsequently named Amos during April 20, after it had developed into a tropical cyclone and started to move north-westwards towards the island nation of Tuvalu.