A heavy rain alert remains in force for the Western half of Viti Levu, Western half of Vanua Levu, and Yasawa and Mamanuca groups.
The Tropical Disturbance lies 1,180 kilometres West North West of Nadi.
The Nadi Weather Office says associated active rainbands are expected to start affecting the Fiji Group from tomorrow.
The disturbance is expected to continue intensifying and become a Tropical Cyclone tomorrow afternoon.
The Weather Office says once named, it will be called Tropical Cyclone Tino.
The system is anticipated to enter the Fiji Waters on Friday.
As the system moves closer towards the group, the onset of destructive force winds is expected as early as Thursday night especially over the Yasawa and Mamanuca groups, Viti Levu, Vanua Levu, Taveuni and nearby smaller islands.
Sea flooding may also be expected, both from the contribution of storm surge and wind driven waves.
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