A heavy rain alert is now in force for Yasawa and Mamanuca group, Viti Levu and Vanua Levu, Lau and Lomaiviti group.

A trough of low pressure just to the West of Fiji is gradually moving towards the group.

Occasional rain, heavy at times and few thunderstorms over Yasawa and Mamanuca group, Viti Levu and Vanua Levu.

The Nadi Weather Office says rain will become heavy and frequent from tonight.

Elsewhere, occasional showers and few thunderstorms.