Tropical Cyclone Ula is expected to pass through the kingdom of Tonga early in the weekend.
The category one system developed on Wednesday night and has caused stormy weather across much of the south west Pacific.
Ula, which is currently compact and producing winds of 85 kilometres an hour, is about 420 kilometres east-south-east of Pago Pago heading in a southwesterly direction at just over 30 kilometres an hour.
Eli Funaki from the Fiji Meteorological Service says Ula will cross through the northern part of Tonga late Friday night at the earliest.
"The current projection is that it will pass just due south of the Niuas and between the Niuas and Vava'u. We're looking at late tomorrow because in turning it slows down and the models show that it will be tomorrow or even in the early hours of Saturday."
Cyclone Ula tacking map Photo: Fiji Met Service