The National Weather Service (NWS) office in San Juan warned Friday morning of heavy rain and an elevated flooding risk as a trough approaches Puerto Rico’s west side, with moisture arriving on west-to-southwest winds. The NWS issued a flood advisory until at least 10:00 AM for Cabo Rojo, Hormigueros and Mayagüez, after Doppler radar detected 1 to 1.5 inches of rain and forecasters expect 1 to 2 additional inches, which could flood low-lying and poorly drained areas.
Meteorologist Kevin Martínez told El Nuevo Día that the trough will bring rain to the west and south through the rest of the morning, with possible urban flooding and water pooling on roads. He noted the pattern is unusual: showers concentrate in the west and south in the morning, then shift in the afternoon toward the interior and northeast, including the metropolitan area, where flooding is also possible.
Clouds and rain will keep Friday’s temperatures down, but heat could be felt again over the weekend, with a limited heat risk that could affect very heat-sensitive people. For the weekend, a northern swell is expected to raise the moderate rip current risk at northwest, north and northeast beaches, including Vieques and Culebra, to high, and swimmers were urged to stay out of those waters.
Wave heights of 3 to 4 feet could rise to 4 to 6 feet on the north coast.