A flash flood watch has been issued by the Meteorological Service for low-lying and flood-prone areas of all parishes.
The watch will remain in effect until 5:00 pm on Saturday.
The flash flood watch means that flash flooding is possible, and residents are advised to take precautionary measures, keep informed by listening to further releases from the Meteorological Service, and be ready for quick action if flooding is observed, or if a warning is issued.
The Met office said unstable atmospheric conditions associated with a trough over the central Caribbean were expected to influence weather conditions across Jamaica from Friday until Sunday.
The projections were for heavy rainfall to affect sections of most parishes at different points over the period.
A few weeks ago, heavy rains swept the island and led to extensive flooding in several communities, particularly in Clarendon.