Special Marine Warning
N
Issued by NWS San Juan PR
⏳ In force until Wed 21 Oct, 07:30 📍 Atlantic Waters of Puerto Rico AND USVI from 10 NM to 19.5N (approximate) 🕑 3 h ago
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... * 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.…
🗃 Archived report - it is no longer on the live map. Pages are kept for 30 days.
📡 CAP alert details
Common Alerting Protocol
Official alert linked
▾
📡 CAP alert details
Common Alerting Protocol
⚠
SeveritySevere
⏱
UrgencyImmediate
❓
CertaintyLikely
EventSpecial Marine Warning
Response typeAvoid
CategoryMet
Affected areaAtlantic Waters of Puerto Rico AND USVI from 10 NM to 19.5N
Issuing authorityNWS San Juan PR
ContactNot supplied
🕓 Alert timing · EAT
Sent2026-10-20T23:09:00-04:00
Effective2026-10-20T23:09:00-04:00
Onset2026-10-20T23:09:00-04:00
Expires2026-10-21T00:30:00-04:00
📋 Official instructions
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.📄 Message details
Alert identifierurn:oid:2.49.0.1.840.0.cc035ca7b4569f4756e41ab1d6e4249dafb81d03.001.1
Message typeAlert
Senderw-nws.webmaster@noaa.gov
ScopePublic
CAP statusActual
Related messagesNot supplied
ⓘ CAP fields populate when an official alert is linked.
🛡 Safety advice
General guidance for this type of incident - not official instructions.
- 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.
- Stay aware of your surroundings in this area.
- Follow official updates from the police and local authorities.
- In an emergency call 112 (police) or 112 (ambulance), or request help through Jilinde.
📰 Story summary
From the report shown in the feed:
- 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...
- * 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.…
ⓘ News summary · read the original report for full context.
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