Tropical Cyclone Fina remains a category three system. ()
Tropical Cyclone Fina has intensified into a category four system off the Northern Territory's Top End, as it slowly moves south-west towards the north-east Kimberley coast.
The Bureau of Meteorology (BOM) says the destructive core of the cyclone is now located well off the west Top End coast.
It is expected to remain a severe tropical cyclone during Sunday as it moves south-west, through the Joseph Bonaparte Gulf.
The BOM's latest update shows the cyclone has sustained winds of 165 kilometres per hour near its centre, with wind gusts up to 230 km/h.
Live 120-hour Cyclone Fina forecast map
This map shows a 120-hour forecast for Tropical Cyclone Fina's path.
It also shows high-wind, cyclone watch and cyclone warning areas.
Tropical Cyclone Fina is expected to start weakening quickly on Monday as it takes a track to the west-north-west near the north-east Kimberley coast.
Official BOM Cyclone Fina tracking map
A warning zone includes Wadeye to Dundee Beach in the Northern Territory, as well as the NT/WA border to Troughton Island, including Kalumburu in Western Australia.
People living in the warning zone should immediately commence or continue preparations, especially securing boats and property.