NWS Jacksonville FLMA.W 0240October 4, 2026
Special Marine Warning: Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM
The National Weather Service office in Jacksonville issued a special marine warning for Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM, which was in force until 11:15 p.m. local time on October 4. It was the 240th special marine warning the NWS office in Jacksonville issued in 2026.
ExpiredWarning
In force for 1.5 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Jacksonville FL
- Area
- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM
- Level
- Warning
- Issued
- 9:45 p.m. EDT, October 4, 2026
- Expires
- 11:15 p.m. EDT, October 4, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KJAX MA.W 0240
- Official source
- National Weather Service: the notice at its source
NWS notices, October 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... Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM... * Until 1115 PM EDT. * At 944 PM EDT, a strong thunderstorm was located 35 nm east of Guana River State Park, or 38 nm northeast of Saint Augustine, moving east at 15 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... Navy Drydock, Tournament Reef, and Casablanca Reef.
What the agency told people to do
Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately. 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.
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.