NWS Jacksonville FLMA.W 0231September 12, 2026
Special Marine Warning: Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM
The National Weather Service office in Jacksonville issued a special marine warning for Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM, which was in force until 6:15 p.m. local time on September 12. It was the 231st special marine warning the NWS office in Jacksonville issued in 2026.
ExpiredWarning
In force for 1.1 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Jacksonville FL
- Area
- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM
- Level
- Warning
- Issued
- 5:08 p.m. EDT, September 12, 2026
- Expires
- 6:15 p.m. EDT, September 12, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KJAX MA.W 0231
- Official source
- National Weather Service: the notice at its source
NWS notices, September 2026The latest from the National Weather Service
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
SMWJAX The National Weather Service in Jacksonville has issued a * Special Marine Warning for... Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM... * Until 615 PM EDT. * At 508 PM EDT, a strong thunderstorm was located over Mayport, or 32 nm north of Saint Augustine, moving northeast at 10 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... Atlantic Beach, Mayport, Talbot Island, Nassau Sound Approach Buoy 6a, Saint Johns Lighted Buoy, Amelia City, and Whittakers Snapper Hole Reef.
What the agency told people to do
Move to safe harbor until hazardous weather passes. If your vessel is caught offshore, immediately secure for heavy weather. Ensure all crew members are wearing USCG approved Type I life jackets and nonessential crew are below decks. Deploy jack lines and harnesses if available. Check life saving equipment, including batteries on handheld radios, for readiness. Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.