Weather: Heavy rainfall periods became reduced late Friday on Trinidad where flash and river flooding occurred. Some light to briefly moderate showers can be expected from Barbados and St. Vincent south to Trinidad and Tobago. From St. Lucia to Virgin Islands mostly intermittent light showers, except overnight to morning will have a bit more.
As per the Eastern Caribbean Weather updates, A MID – UPPER LOW is east of the Leewards with digging upper trough extending down to northeast South America(2nd & 3rd pic). It is moving southwest towards the islands. It supports a low level trough extending north from Suriname which will slowly move west to the islands. Currently, scattered thunderstorms are under the upper low and cloudiness and showers are east of the trough axis some north of Guianas.
Sunday: As the upper low approaches the islands late Sunday it will cause a gradual increase in cloudiness and showers and isolated thunderstorms into Monday.
Late Monday to Tuesday: A further increase in high moisture convergence & low-mid level instability is expected as the upper low deepens over the Lesser Antilles. Overcast skies, periods of rain, moderate to heavy showers and isolated thunderstorms will impact much of the Lesser Antilles.
By late Tuesday: more of the heavy rainfall & thunderstorms will spread to the northernmost islands into Wednesday whilst continuing on the rest of the region.
As per the Weather predictions, Thursday to Friday also have chances for occasional heavy rainfall especially northern and southern islands. Note that the large scale upper level pattern supports enhanced rainfall next week so we can have a medium to high degree of confidence in this scenario depicted by models.
The potential for 1 or 2 or more heavy rainfall periods with high rain rates exists, especially during the Tuesday to Wednesday period and with the recent heavy rainfall last few weeks, flash flooding, river flooding, and mudslide events will be easier to occur.
Any cleaning of drains, bridges and general cleanup that need to be done after recent floods/landslides, should be completed this weekend to mitigate potential impacts.