{"url_path":"/weather/alerts/2.49.0.1.840.0.065947f712cae25f598eeab37f26c1f62255aad4.001.1","section_key":"alert","section_title":"Special Marine Warning issued July 4 at 7:06PM EDT until July 4 at 8:00PM EDT by NWS Baltimore MD/Washington DC","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-04","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.065947f712cae25f598eeab37f26c1f62255aad4.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Baltimore MD/Washington DC"},"word_count":153,"has_tables":false,"body_markdown":"# Special Marine Warning: Special Marine Warning issued July 4 at 7:06PM EDT until July 4 at 8:00PM EDT by NWS Baltimore MD/Washington DC\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** Tidal Potomac from Indian Head to Cobb Island MD\n**Issued by:** NWS Baltimore MD/Washington DC\n**Sent:** 2026-07-04T19:06:00-04:00\n**Effective:** 2026-07-04T19:06:00-04:00\n**Expires:** 2026-07-04T20:00:00-04:00\n\n## Description\nSMWLWX\n\nThe National Weather Service in Sterling Virginia has issued a\n\n* Special Marine Warning for...\nTidal Potomac from Indian Head to Cobb Island MD...\n\n* Until 800 PM EDT.\n\n* At 706 PM EDT, a strong thunderstorm was located near Dahlgren,\nmoving northeast at 20 knots.\n\nHAZARD...Wind gusts 34 knots or greater.\n\nSOURCE...Radar indicated.\n\nIMPACT...Boaters in small craft could be thrown overboard by\nsuddenly higher winds and waves capsizing their vessel.\n\n* Locations impacted include...\nSwan Point, Mathias Point, U.S. 301 Nice Memorial Bridge, Maryland\nPoint, Nanjemoy Creek, Port Tobacco River, Popes Creek, Fairview\nBeach, and Colonial Beach.\n\n## Instructions\nMove to safe harbor until hazardous weather passes."}