237 WHCA52 TJSJ 210309 SMWSJU AMZ711-210430- /O.NEW.TJSJ.MA.W.0027.261021T0309Z-261021T0430Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service San Juan PR 1109 PM AST Tue Oct 20 2026 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... * Until 1230 AM AST. * At 1109 PM AST, a severe thunderstorm capable of producing waterspouts was located over open waters of Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N zone, moving northeast at 10 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. Boaters should seek safe harbor immediately until this storm passes. Wind gusts 34 knots or greater, high waves, dangerous lightning, and heavy rain are possible with this storm. Report severe weather to the Coast Guard or nearest law enforcement agency. They will relay your report to the National Weather Service office. && LAT...LON 1915 6639 1915 6670 1950 6679 1950 6628 TIME...MOT...LOC 0308Z 213DEG 8KT 1927 6651 WATERSPOUT...POSSIBLE MAX HAIL SIZE...0.00 IN MAX WIND GUST...<34 KTS $$ ICP  469 FZCA72 TJSJ 210328 MWSSJU Marine Weather Statement National Weather Service San Juan PR 1128 PM AST Tue Oct 20 2026 AMZ711-210500- 1128 PM AST Tue Oct 20 2026 ...AN AREA OF STRONG THUNDERSTORMS DEVELOPING OVER THE LOCAL ATLANTICWATERS... The areas affected include... Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N... * At 1128 PM AST, Doppler radar indicated an area of strong thunderstorms, capable of producing winds to around 30 knot and frequent lightning. These strong thunderstorm were located over an area extending from about 10-15 nm north of Arecibo and Aguadilla northwestward to near about 19.5N within the local Atlantic waters, moving northwest at 5 knots. Locations impacted include... Mainly open waters of Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N. PRECAUTIONARY/PREPAREDNESS ACTIONS... Report severe weather to the Coast Guard or nearest law enforcement agency. They will relay your report to the National Weather Service office. Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. Intense lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. && LAT...LON 1870 6611 1870 6750 1950 6800 1950 6670 TIME...MOT...LOC 0328Z 225DEG 10KT 1884 6700 $$ ICP