866 

WHCA52 TJSJ 131415

SMWSJU

AMZ726-733-131515-

/O.NEW.TJSJ.MA.W.0007.260413T1415Z-260413T1515Z/



BULLETIN - IMMEDIATE BROADCAST REQUESTED

Special Marine Warning

National Weather Service San Juan PR

1015 AM AST Mon Apr 13 2026



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 east of Puerto Rico, around Vieques, and around and

  just north of Culebra and Saint John...



* Until 1115 AM AST.



* At 1013 AM AST, severe thunderstorms capable of producing 

  waterspouts were located in an area northwest of St. Croix to east 

  of Vieques. These cluster of thunderstorms were nearly stationary. 



  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.



Thunderstorms can produce sudden waterspouts. Waterspouts can easily

overturn boats and create locally hazardous seas. Seek safe harbor

immediately.



Frequent lightning is occurring with these storms. 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 1795 6464 1771 6506 1799 6549 1813 6536

      1811 6534 1814 6530 1813 6527 1815 6529

      1814 6533 1815 6533 1829 6520

TIME...MOT...LOC 1413Z 251DEG 13KT 1818 6508 1804 6517 1788 6497 



WATERSPOUT...POSSIBLE

HAIL...0.00IN

WIND...>34KTS



$$



CVB






258 

WGCA52 TJSJ 131445

FFWSJU

VIC020-131730-

/O.NEW.TJSJ.FF.W.0014.260413T1445Z-260413T1730Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/



BULLETIN - EAS ACTIVATION REQUESTED

Flash Flood Warning

National Weather Service San Juan PR

1045 AM AST Mon Apr 13 2026



The National Weather Service in San Juan has issued a



* Flash Flood Warning for...

  Saint John in Virgin Islands...



* Until 130 PM AST.



* At 1045 AM AST, Doppler radar indicated thunderstorms producing 

  heavy rain across the warned area. Between 1 and 2 inches of rain 

  have fallen. Additional rainfall amounts of 1 to 3 inches are 

  possible in the warned area. Flash flooding is ongoing or expected 

  to begin shortly.



  HAZARD...Life threatening flash flooding. Thunderstorms

           producing flash flooding.



  SOURCE...Radar.



  IMPACT...Life threatening flash flooding of creeks and streams,

           urban areas, highways, streets and underpasses.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Turn around, don't drown when encountering flooded roads. Most flood 

deaths occur in vehicles.



Please report observed flooding to local emergency services or law 

enforcement and request they pass this information to the National 

Weather Service when you can do so safely.



&&



LAT...LON 1832 6466 1832 6468 1831 6468 1828 6471

      1831 6475 1830 6478 1832 6482 1834 6482

      1834 6484 1835 6485 1836 6485 1838 6481

      1838 6479 1837 6479 1838 6475 1839 6474

      1833 6464



FLASH FLOOD...RADAR INDICATED

FLASH FLOOD DAMAGE THREAT...CONSIDERABLE



$$



CVB