Alert archive / Puerto Rico / Small Craft Advisories in 2026
Small Craft Advisory 21, NWS JSJ
NWS JSJ issued this small craft advisory at Jul 8, 2026, 4:00 PM CDT. It took effect at Jul 9, 2026, 11:00 AM CDT. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Jul 8, 2026, 4:00 PM CDT (21:00 UTC)
- In effect from
- Jul 9, 2026, 11:00 AM CDT
- Expired
- Jul 10, 2026, 2:57 AM CDT
- In force
- 16 hr
- Issued by
- NWS JSJ
The text
As transmitted.
702 WHCA72 TJSJ 082100 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 500 PM AST Wed Jul 8 2026 AMZ712-735-090500- /O.CAN.TJSJ.SC.Y.0020.000000T0000Z-260709T0400Z/ /O.NEW.TJSJ.SC.Y.0021.260709T1600Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 500 PM AST Wed Jul 8 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON THURSDAY TO 6 AM AST FRIDAY... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 4 to 7 ft expected. * WHERE...Coastal Waters of Northern Puerto Rico out 10 NM and Coastal Waters of Southern Puerto Rico out 10 NM. * WHEN...From noon Thursday to 6 AM AST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ711-733-741-090500- /O.CON.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 500 PM AST Wed Jul 8 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST FRIDAY NIGHT... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 5 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
6 follow-up statements
991 WHCA72 TJSJ 090117 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 917 PM AST Wed Jul 8 2026 AMZ711-733-741-090930- /O.CON.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 917 PM AST Wed Jul 8 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST FRIDAY NIGHT... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 5 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ712-735-090930- /O.CON.TJSJ.SC.Y.0021.260709T1600Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 917 PM AST Wed Jul 8 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM NOON THURSDAY TO 6 AM AST FRIDAY... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 4 to 7 ft expected. * WHERE...Coastal Waters of Northern Puerto Rico out 10 NM and Coastal Waters of Southern Puerto Rico out 10 NM. * WHEN...From noon Thursday to 6 AM AST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
943 WHCA72 TJSJ 090736 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 336 AM AST Thu Jul 9 2026 AMZ711-733-741-092200- /O.CON.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 336 AM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST FRIDAY NIGHT... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 5 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ712-735-092200- /O.CON.TJSJ.SC.Y.0021.260709T1600Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 336 AM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 6 AM AST FRIDAY... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 5 to 6 ft expected. * WHERE...Coastal Waters of Northern Puerto Rico out 10 NM and Coastal Waters of Southern Puerto Rico out 10 NM. * WHEN...From noon today to 6 AM AST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
581 WHCA72 TJSJ 091450 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 1050 AM AST Thu Jul 9 2026 AMZ711-733-741-092300- /O.CON.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 1050 AM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST FRIDAY NIGHT... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 5 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ712-735-092300- /O.CON.TJSJ.SC.Y.0021.260709T1600Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 1050 AM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM AST FRIDAY... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 5 to 6 ft expected. * WHERE...Coastal Waters of Northern Puerto Rico out 10 NM and Coastal Waters of Southern Puerto Rico out 10 NM. * WHEN...From noon today to 6 AM AST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
798 WHCA72 TJSJ 092019 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 419 PM AST Thu Jul 9 2026 AMZ711-733-741-100430- /O.CON.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 419 PM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST FRIDAY NIGHT... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 5 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ712-735-100430- /O.CON.TJSJ.SC.Y.0021.000000T0000Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 419 PM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM AST FRIDAY... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 7 ft. * WHERE...Coastal Waters of Northern Puerto Rico out 10 NM and Coastal Waters of Southern Puerto Rico out 10 NM. * WHEN...Until 6 AM AST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
402 WHCA72 TJSJ 100016 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 816 PM AST Thu Jul 9 2026 AMZ711-733-741-100830- /O.CON.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 816 PM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT AST FRIDAY NIGHT... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 5 to 7 ft. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ712-735-100830- /O.CON.TJSJ.SC.Y.0021.000000T0000Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 816 PM AST Thu Jul 9 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM AST FRIDAY... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 7 ft. * WHERE...Coastal Waters of Northern Puerto Rico out 10 NM and Coastal Waters of Southern Puerto Rico out 10 NM. * WHEN...Until 6 AM AST Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
917 WHCA72 TJSJ 100757 MWWSJU URGENT - MARINE WEATHER MESSAGE National Weather Service San Juan PR 357 AM AST Fri Jul 10 2026 AMZ711-733-741-102200- /O.CAN.TJSJ.SC.Y.0020.000000T0000Z-260711T0400Z/ /O.NEW.TJSJ.SC.Y.0022.260710T1000Z-260711T0400Z/ Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix-Mona Passage Southward to 17N- 357 AM AST Fri Jul 10 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT AST TONIGHT... * WHAT...East winds 15 to 20 kt with gusts up to 30 kt and seas 5 to 7 ft expected. * WHERE...Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N, Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix and Mona Passage Southward to 17N. * WHEN...Until midnight AST tonight. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ AMZ712-735-100900- /O.CAN.TJSJ.SC.Y.0021.000000T0000Z-260710T1000Z/ Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters of Southern Puerto Rico out 10 NM- 357 AM AST Fri Jul 10 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... Still, small craft operators should exercise caution across these waters. $$
The office that day
Everything else NWS JSJ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 3:49 PM CDT | Areal Flood Advisory | JSJ | 51 min |
Nearby
Small Craft Advisories in Puerto Rico, 2026Every small craft advisory in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.