The National Weather Service in San Juan, Puerto Rico has issued a Flash Flood Watch for the U.S. Virgin Islands and neighboring areas in anticipation of heavy rainfall and thunderstorms expected to intensify between Thursday morning and Saturday morning. The unsettled weather pattern is being driven by a combination of mid-to-upper level atmospheric troughs and abundant moisture from a nearly stationary front, creating conditions conducive to intense thunderstorms across the region.

The NWS forecasts that rainfall totals could reach between 3 to 6 inches, with localized areas in northern and eastern Puerto Rico, Vieques, Culebra, and the U.S. Virgin Islands potentially seeing as much as 8 to 10 inches. Other areas may experience rainfall ranging from 1 to 2 inches. This volume of rain, especially in steep terrain, raises the risk of flash flooding, sudden river surges, and potential mudslides.

The Flash Flood Watch means there's a high probability that prolonged periods of moderate to heavy rain could lead to flash flooding and dangerous river surges, with some rivers likely reaching or exceeding flood-stage levels.

Additionally, the NWS has warned of hazardous marine conditions expected to develop from Thursday onward. Strong winds and swell action will create life-threatening rip currents, presenting a risk to those in coastal areas or engaging in marine activities.

Residents and visitors in the U.S. Virgin Islands and Puerto Rico are advised to stay informed by monitoring weather updates and exercising caution, particularly in flood-prone or coastal areas.