The National Weather Service issued a flash flood warning Monday afternoon for four towns in Puerto Rico’s metropolitan area: Carolina, Guaynabo, San Juan and Trujillo Alto. The alert remains in effect until 4:15 PM. Earlier, the agency said the island would see a hot morning in coastal and urban zones, followed by showers and thunderstorms developing in the afternoon that could affect school, sports and outdoor activities, especially over inland, northern and western sectors.
At 1:28 PM, Doppler radar detected thunderstorms producing heavy rain over the warned areas, where 1 to 2 inches of rain have already fallen and another 1 to 2 inches are possible. The warning states that flash flooding is underway or expected to begin shortly. Separately, the agency issued a high surf warning and an advisory for high risk of dangerous rip currents for San Juan and nearby areas, the northeast, north central, northwest, and Mayagüez and its surroundings.
The high surf warning runs from 2:00 AM to 6:00 PM. Tuesday, while the high rip current risk extends until Wednesday morning. Breaking waves of 8 to 12 feet are expected, and the most vulnerable areas are exposed beaches facing the northwest and north.