The Antigua and Barbuda Meteorological Services has issued a flash flood watch statement.
It says a flash flood watch has been extended for low-lying areas of Anguilla and the British Virgin Islands until 8 am on Thursday.
Meanwhile, a flash flood watch will go into effect for Antigua and Barbuda, Montserrat, and St Kitts and Nevis from 8 pm on Wednesday to 8 pm on Thursday.
Antigua Met Services says a flash flood watch means that moderate to major flooding is possible but not imminent in the watch area. Flash flooding is a very dangerous situation. These watches could be upgraded to warnings if necessary.
It says residents in low-lying and flood-prone areas should make preparations for flooding to safeguard life and property. They should be prepared to move to higher ground if flooding rains develop or a flash flood warning is issued.
The Met Service notes a frontal trough over the British Virgin Islands is causing periodic heavy showers. This system is moving towards the east and will likely be in the vicinity of the Leeward Islands by tonight.
Already, up to 4 inches of rain have fallen in some places in the last 24 hours and another 1 to 4 more inches is possible by Thursday 8 pm. Hence, moderate to major flooding of low lying and flood prone areas is possible.
Meanwhile, The Virgin Islands Territorial Emergency Management Agency (VITEMA) says as of 4:30 pm, the National Weather Service is advising residents of the USVI that rainfall will continue throughout the night into tomorrow morning. Due to the saturated ground, flooding and mudslides are still possible and residents are advised to exercise caution while driving.
Marine conditions will remain hazardous, especially in the Atlantic waters and Anegada Passage, and boaters are advised to secure their vessels and exercise caution. Overnight, if thick fog conditions persist, drivers are reminded to be extremely cautious, reduce speed and not use high beams.
The Turks and Caicos Islands National Weather Service has this afternoon said a high surf warning is in effect for all islands in the Turks and Caicos Islands until 8 am on Friday.
It states a large area of gale-force winds and high seas will continue to spread across most of the northern tropical Atlantic, associated with a strong low pressure area northeast of the northern Bahamas that will move to the northeast of Bermuda through today.
This system is pushing moderate swells to the shores of the islands, mainly north to east-facing coastlines. The threat level to the life, livelihood, property, and infrastructure of those using the affected coastlines is high, with the potential for significant impacts.
These swells are expected to cause life-threatening surfs and rip currents near affected coastlines.
And, the Meteorological Service in St Maarten says a flood watch is in effect for St Maarten until Thursday at 6 pm. It says abundant moisture and instability associated with a frontal boundary will account for cloudy to overcast skies, scattered showers, gusty winds and thunderstorms across St Maarten.
The Met Service says accumulations of 2 to 4 inches of rainfall can be expected during the next 24 to 48 hours.