At midday today, tropical disturbance TD04F was located about 725km west of Rotuma.
Close to its centre TD04F is expected to have average winds of up to 40km/hr with momentary gusts to 60km/hr.
TD04F is expected to gradually intensify into a tropical depression by this evening and expected to further intensify into a category 1 cyclone by tomorrow evening.
TD04F is currently moving eastwards at about 19km/hrs. On this track the centre is expected to be located about 580km west of Rotuma at 12am tomorrow and about 374km west of Rotuma at 12pm tomorrow.
Most forecasting models are indicating tropical disturbance TD04F will track towards Vanua Levu as a category 1 tropical cyclone on Friday and could possibly intensify further to a category 2 system.
Therefore, heavy rain with squally thunderstorms and strong winds is anticipated especially over Vanua Levu from later today becoming gale force winds from later tomorrow.
Expect moderate to fresh northeast winds. Winds expected to become strong with average speeds of 45km/hr with momentary gusts to 65km/hr from tomorrow afternoon and further increase to damaging gale force winds with average speeds of 65km/hr and momentary gusts to 95km/hr from tomorrow night.
Periods of rain, heavy at times and squally thunderstorms. Sea flooding should be expected along coastal areas especially during high tides on the onset of gale force winds.
Mariners can expect northeast winds 20 to 25 knots with rough seas and moderate to heavy northwesterly swells. Winds expected to further increase up to 35 knots from tomorrow with very rough to high seas and damaging northwesterly swells.
For Yasawa and Mamanuca group, Viti Levu, Lomaiviti group, Vanua Levu, Taveuni and nearby islands, northern Lau group:
Expect occasional showers. Isolated heavy falls and thunderstorms expected especially in the afternoon or evening. Showers expected to increase to rain and become frequent and heavy with squally thunderstorms from this evening.