The latest storm comes only two weeks after the Northern Marianas was struck by category three typhoon Soudelor, which caused extensive damage.
Michael Ziobro, from the US National Weather Service on Guam, says the storm is moving north, northwest at about 14 kilometres an hour and is projected to pass over Tinian and Rota early on Sunday.
Mr Ziobro says people in both the Northern Marianas and Guam should expect potentially damaging winds and heavy rain.
