Special Marine Warning
N
Issued by NWS Key West FL
⏳ In force until Sun 18 Oct, 11:45 📍 Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM; Straits of Florida from Halfmoon Shoal … (approximate) 🕑 2 h ago
For the following areas... Straits of Florida from Halfmoon Shoal to 20 nm west of Dry Tortugas out 60 nm... At 438 AM EDT, a strong thunderstorm was located 21 nm southeast of Tortugas Ecological Reserve South, moving south at 5 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...National Weather Service Meteorologist. IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher waves,…
🗃 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 areaStraits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM; Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out
Issuing authorityNWS Key West FL
ContactNot supplied
🕓 Alert timing · EAT
Sent2026-10-18T04:38:00-04:00
Effective2026-10-18T04:38:00-04:00
Onset2026-10-18T04:38:00-04:00
Expires2026-10-18T04:45:00-04:00
📋 Official instructions
Prepare for wind gusts in excess of 34 knots, steep and fast-building seas, frequent lightning strikes, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets.📄 Message details
Alert identifierurn:oid:2.49.0.1.840.0.5c93461a1f5745d50b3ccb64a86ba469295d030b.001.1
Message typeUpdate
Senderw-nws.webmaster@noaa.gov
ScopePublic
CAP statusActual
Related messagesurn:oid:2.49.0.1.840.0.d0e0e025c6b7d89653e477b2877ac3c9b09b0187.001.1
ⓘ CAP fields populate when an official alert is linked.
🛡 Safety advice
General guidance for this type of incident - not official instructions.
- Prepare for wind gusts in excess of 34 knots, steep and fast-building seas, frequent lightning strikes, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets.
- 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:
- For the following areas...
- Straits of Florida from Halfmoon Shoal to 20 nm west of Dry Tortugas out 60 nm...
- At 438 AM EDT, a strong thunderstorm was located 21 nm southeast of Tortugas Ecological Reserve South, moving south at 5 knots.
- HAZARD...Wind gusts 34 knots or greater.
- SOURCE...National Weather Service Meteorologist.
- IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher waves,…
ⓘ News summary · read the original report for full context.
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