A tropical storm is expected to pass near to Trinidad and Tobago on Saturday.
A statement by the Met Office said that a low-pressure system in the Atlantic has been upgraded to Tropical Depression Seven (TD #7) as at 5 pm today.
It said an increase in forward speed is expected tonight and Wednesday and westward motion should continue through to Friday.
Strengthening is forecast during the next couple of days and the depression is expected to become a tropical storm tonight or Wednesday.
Current analyses suggest that on its current track, the system is forecast to reach the Southern Windward islands by Saturday morning and is expected to move just north of Trinidad and Tobago.
The Met Office said it will continue to closely monitor the system and will issue an update at 6 am tomorrow or earlier if the situation warrants.