A Tropical Low is currently estimated to be 80km north of Cape Don and 225km north northeast of Darwin and moving west at 6km/h.
There is a possibility of a tropical cyclone developing during Friday as the tropical low moves into the Timor Sea, west of the Tiwi Islands.
A Cyclone Watch has been declared for a developing tropical low for the Tiwi Islands.
Gales are not expected along the coast during the next 24 hours, but may develop on Friday about the Tiwi Islands. These gales may extend to the coast later on Friday between Cape Hotham and Port Keats, including Darwin.
There is also the potential for very heavy rainfall along the north coast of the NT. Maningrida has seen more than 118mm in the past 24 hours.