Special Marine Warning
N
Issued by NWS San Juan PR
⏳ In force until Tue 20 Oct, 23:00 📍 Atlantic Waters of Puerto Rico AND USVI from 10 NM to 19.5N; Coastal Waters of Northern Puerto Rico out 10 NM (approximate) 🕑 2 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... Coastal Waters of Northern Puerto Rico out 10 NM... * Until 400 PM AST. * At 301 PM AST, A severe thunderstorm capable of producing waterspouts is now reaching the Atlantic Waters of Puerto Rico from 10 NM to 19.5N and Coastal Waters of Northe…
🗃 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; Coastal Waters of Northern Puerto Rico out 10 NM
Issuing authorityNWS San Juan PR
ContactNot supplied
🕓 Alert timing · EAT
Sent2026-10-20T15:01:00-04:00
Effective2026-10-20T15:01:00-04:00
Onset2026-10-20T15:01:00-04:00
Expires2026-10-20T16:00:00-04:00
📋 Official instructions
Move to safe harbor until hazardous weather passes. Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately.📄 Message details
Alert identifierurn:oid:2.49.0.1.840.0.a6ccf4b4aef540660ed1c5b3c3850e47fd667828.001.1
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. Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately.
- 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...
- Coastal Waters of Northern Puerto Rico out 10 NM...
- * Until 400 PM AST.
- * At 301 PM AST, A severe thunderstorm capable of producing waterspouts is now reaching the Atlantic Waters of Puerto Rico from 10 NM to 19.5N and Coastal Waters of Northe…
ⓘ News summary · read the original report for full context.
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