Special Marine Warning issued August 15 at 3:32PM AST until August 15 at 4:30PM AST by NWS San Juan PR

SMWSJU The National Weather Service in San Juan has issued a * Special Marine Warning for... Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix... Coastal Waters of Southern Puerto Rico out 10 NM... Mona Passage Southward to 17N... * Until 430 PM AST. * At 332 PM AST, Strong thunderstorms capable of producing waterspouts were located over open waters of Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix. These storms are expected to reach the coastal waters of southern Puerto Rico and the Mona Passage southward to 17N during the next hour. These storms were moving west northwest around 30 knots. HAZARD...Waterspouts and wind gusts to 40 knots. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix, Coastal Waters of Southern Puerto Rico out 10 NM and Mona Passage Southward to 17N.

What to do: Boaters should seek safe harbor immediately until these storms pass. Wind gusts 34 knots or greater, high waves, dangerous lightning, and heavy rain are possible with these storms.

Issued by NWS San Juan PR; in effect until Sat, 15 Aug 2026 20:30:00 GMT.

Source: National Weather Service (NOAA). Factual summary of a public release; not financial advice.

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