{"url_path":"/weather/alerts/2.49.0.1.840.0.6b9144f890a268885cddd75e1c309fc3a5a4fd49.001.1","section_key":"alert","section_title":"Special Marine Warning issued July 4 at 5:29PM EDT until July 4 at 7:30PM 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%3A2.49.0.1.840.0.6b9144f890a268885cddd75e1c309fc3a5a4fd49.001.1","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":204,"has_tables":false,"body_markdown":"# Special Marine Warning: Special Marine Warning issued July 4 at 5:29PM EDT until July 4 at 7:30PM EDT by NWS Baltimore MD/Washington DC\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD\n**Issued by:** NWS Baltimore MD/Washington DC\n**Sent:** 2026-07-04T17:29:00-04:00\n**Effective:** 2026-07-04T17:29:00-04:00\n**Expires:** 2026-07-04T19:30:00-04:00\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...\nTidal Potomac from Key Bridge to Indian Head MD...\n\n* Until 730 PM EDT.\n\n* At 529 PM EDT, a strong thunderstorm was located over Potomac\nCreek, moving northeast at 30 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...\nFort Washington, Tidal Basin, Reagan National Airport, Gunston\nHall, Mason Neck State Park, Woodrow Wilson Bridge, Indian Head,\nKey Bridge, Fort Hunt, National Harbor, and Alexandria.\n\n## Instructions\nMove to safe harbor immediately as gusty winds and high waves are\nexpected.\n\nFrequent lightning is occurring with this storm. If caught on the\nopen water stay below deck if possible, keep away from ungrounded\nmetal objects."}