A flash flood watch is in effect western, north central and eastern parishes.
The MET Service issued the watch for low-lying and flood-prone areas of Westmoreland, Hanover, St. James, St. Elizabeth, Trelawny, St. Ann, St. Mary, Portland, St. Thomas, Kingston and St. Andrew.
The watch will remain in effect until 5:00 p.m. tomorrow.
The MET Office said a broad trough across the central Caribbean has been influencing weather conditions across Jamaica for the past two days, with the most intense activity associated with the system expected to linger through to Friday.
Observations indicate that light to moderate and occasionally heavy showers and thunderstorms have been affecting most parishes throughout the day.
The forecast is for cloudy conditions, with widespread showers and occasional heavy thundershowers to continue affecting all parishes through to late Friday.
Fishers and other marine interests should exercise caution as sea conditions will deteriorate due to thunderstorms and strong gusty winds.
A 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 MET Service and be ready for quick action if flooding is observed or if a warning is issued.