Severe · Special Marine WarningThis alert has expired. It is kept for reference.
Special Marine Warning issued October 20 at 3:01PM AST until October 20
Affecting Atlantic Waters of Puerto Rico AND USVI from 10 NM to 19.5N; Coastal Waters of Northern Puerto Rico out 10 NM
In effect until: Oct 20, 2026, 8:00 PM
Atlantic Waters of Puerto Rico AND USVI from 10 NM to 19.5N; Coastal Waters of Northern Puerto Rico out 10 NM
Likely impact; effects through 8:00 PM.
Move to safe harbor until hazardous weather passes. Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately.
Read the original bulletin (official text)
SMWSJU The National Weather Service in San Juan has issued a * Special Marine Warning for... Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N... Coastal Waters of Northern Puerto Rico out 10 NM... * Until 400 PM AST. * At 301 PM AST, A severe thunderstorm capable of producing waterspouts is now reaching the Atlantic Waters of Puerto Rico from 10 NM to 19.5N and Coastal Waters of Northern Puerto Rico out 10 NM zones, moving north-northeast at 25 knots. HAZARD...Waterspouts. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. * Locations impacted include... Mainly open waters of Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N and Coastal Waters of Northern Puerto Rico out 10 NM.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™