930 

WHCA52 TJSJ 161003

SMWSJU

AMZ733-741-161045-

/O.NEW.TJSJ.MA.W.0047.251016T1003Z-251016T1045Z/



BULLETIN - IMMEDIATE BROADCAST REQUESTED

Special Marine Warning

National Weather Service San Juan PR

603 AM AST Thu Oct 16 2025



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...

  Mona Passage Southward to 17N...



* Until 645 AM AST.



* At 601 AM AST, a severe thunderstorm capable of producing 

  waterspouts was located over the northern part of Mona Passage, 

  moving northeast at 15 knots.



  HAZARD...Waterspouts and wind gusts 34 knots or greater.



  SOURCE...Radar.



  IMPACT...Waterspouts can easily overturn boats and create locally 

           hazardous seas. Small craft could be damaged in briefly 

           higher winds and suddenly higher waves.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Move to safe harbor immediately as gusty winds and high waves are

expected.



Frequent lightning is occurring with this storm. If caught on the

open water stay below deck if possible, keep away from ungrounded

metal objects.



Report severe weather to the Coast Guard or the National Weather

Service.



&&



LAT...LON 1848 6799 1850 6783 1850 6743 1844 6742

      1840 6744 1832 6744 1825 6740 1791 6739

      1785 6737 1795 6800 1809 6800 1809 6801

TIME...MOT...LOC 1001Z 229DEG 14KT 1832 6786 



WATERSPOUT...POSSIBLE

HAIL...0.00IN

WIND...>34KTS



$$



CVB






476 

FZCA72 TJSJ 161054

MWSSJU



Marine Weather Statement

National Weather Service San Juan PR

654 AM AST Thu Oct 16 2025



AMZ733-735-741-742-745-161300-

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-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

654 AM AST Thu Oct 16 2025



...STRONG THUNDERSTORMS OVER THE MONA PASSAGE...



The Doppler radar indicated a line of strong thunderstorms, 

capable of producing winds to around 30 knots and frequent 

lightning. These thunderstorms were located over the Mona Passage,

moving east at 15 knots. These thunderstorms will move over the

western coastal waters of Puerto Rico and across the offshore

Caribbean waters through the morning hours.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Mariners can expect gusty winds to around 30 knots, locally higher

waves, lightning strikes, and heavy downpours. Boaters should seek

safe harbor immediately until these storms pass.



Intense lightning is occurring with these storms. If caught on the

open water stay below deck if possible, keep away from ungrounded

metal objects.



$$