A slow-moving tropical storm is gathering strength in the Arafura Sea between Australia and Indonesia.
It is likely to become a cyclone on Tuesday before possibly intensifying into a category two system, Australia's Bureau of Meteorology said.
Small island and coastal communities have been warned to prepare for heavy rain, gale-force winds and storm tides.
"The centre of the system is likely to cross the western Tiwi Islands sometime later on Tuesday afternoon," forecaster Craig Earl-Spurr told the NT News.
