The National Weather Service (NWS) office in San Juan maintained flood advisories Thursday for numerous Puerto Rico municipalities amid heavy rain and thunderstorms. An advisory for Ceiba, Fajardo and Luquillo, where 1–2 inches of rain had fallen by 3:39 PM, was extended to 6:45 PM with up to 1 additional inch expected. Aibonito, Cayey, Cidra and Coamo remained under an advisory until 5:30 PM, also with 1–2 inches recorded and up to 1 more inch possible.
Vieques was under an advisory until 5:30 PM, with Doppler radar estimating 1–2 inches accumulated and up to 2 additional inches possible—the largest additional total forecast among the areas. In the south, Arroyo, Guayama and Salinas remained under an advisory until 5:15 PM, with 1–2 inches fallen and up to 1 more inch possible. An advisory for northwest Arecibo, north Camuy and Hatillo, plus Isabela and Quebradillas, was extended until 4:30 PM, with 1–2.5 inches estimated and up to 1 additional inch possible. The NWS reported water on some roadways.