{"url_path":"/weather/alerts/2.49.0.1.840.0.fd651fe016776c1920546f15a373d494b2ddd9d9.001.1","section_key":"alert","section_title":"Special Marine Warning issued June 20 at 6:54PM EDT until June 20 at 8:00PM EDT by NWS Jacksonville FL","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-06-20","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.fd651fe016776c1920546f15a373d494b2ddd9d9.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Jacksonville FL"},"word_count":225,"has_tables":false,"body_markdown":"# Special Marine Warning: Special Marine Warning issued June 20 at 6:54PM EDT until June 20 at 8:00PM EDT by NWS Jacksonville FL\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM; Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM\n**Issued by:** NWS Jacksonville FL\n**Sent:** 2026-06-20T18:54:00-04:00\n**Effective:** 2026-06-20T18:54:00-04:00\n**Expires:** 2026-06-20T20:00:00-04:00\n\n## Description\nSMWJAX\n\nThe National Weather Service in Jacksonville has issued a\n\n* Special Marine Warning for...\nCoastal waters from Altamaha Sound to Fernandina Beach FL out 20\nNM...\nCoastal waters from Fernandina Beach to St. Augustine FL out 20\nNM...\n\n* Until 800 PM EDT.\n\n* At 654 PM EDT, a strong thunderstorm was located 8 nm north of\nAmelia City, or 27 nm south of St. Simons Island, moving east at 25\nknots.\n\nHAZARD...Wind gusts 34 knots or greater.\n\nSOURCE...Radar.\n\nIMPACT...Small craft could be damaged in briefly higher winds and\nsuddenly higher waves.\n\n* Locations impacted include...\nDungeness, Saint Marys Entrance Buoy 16, Buoy Kby, and Whittakers\nSnapper Hole Reef.\n\n## Instructions\nMove to safe harbor until hazardous weather passes. If your vessel is\ncaught offshore, immediately secure for heavy weather. Ensure all\ncrew members are wearing USCG approved Type I life jackets and\nnonessential crew are below decks. Deploy jack lines and harnesses if\navailable. Check life saving equipment, including batteries on\nhandheld radios, for readiness."}