It says the tropical cyclone warning category two for Samoa in now cancelled.
But a tropical cyclone warning category one in remains in effect for the eastern side of Upolu.
At 4am local time, tropical Cyclone Amos Category three was about 95 kilometres east of Faleolo or 72 kilometres east of Apia.
Tropical cyclone Amos is moving east-southeast at 30 kilometres an hour and is weakening slowly.
Forecasters predict sustained winds of 148 kilometres an hour close to the centre, easing to 130 kilometres an hour in the next 12 hours.
