{"url_path":"/weather/alerts/2.49.0.1.840.0.4561b12f376749ee1625bf6aa5117a55185212a4.001.1","section_key":"alert","section_title":"Special Marine Warning issued July 3 at 7:05PM EDT until July 3 at 8:30PM EDT by NWS Detroit/Pontiac MI","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-03","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.4561b12f376749ee1625bf6aa5117a55185212a4.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Detroit/Pontiac MI"},"word_count":249,"has_tables":false,"body_markdown":"# Special Marine Warning: Special Marine Warning issued July 3 at 7:05PM EDT until July 3 at 8:30PM EDT by NWS Detroit/Pontiac MI\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** St. Clair River; Harbor Beach to Port Sanilac MI; Port Sanilac to Port Huron MI; Lake Huron from Harbor Beach to Port Sanilac 5NM Off Shore to US/Canadian border; Lake Huron from Port Sanilac to Port Huron 5NM Off Shore to US/Canadian border\n**Issued by:** NWS Detroit/Pontiac MI\n**Sent:** 2026-07-03T19:05:00-04:00\n**Effective:** 2026-07-03T19:05:00-04:00\n**Expires:** 2026-07-03T20:30:00-04:00\n\n## Description\nSMWDTX\n\nThe National Weather Service in Detroit/Pontiac has issued a\n\n* Special Marine Warning for...\nHarbor Beach to Port Sanilac MI...\nLake Huron from Harbor Beach to Port Sanilac 5NM Off Shore to\nUS/Canadian border...\nLake Huron from Port Sanilac to Port Huron 5NM Off Shore to\nUS/Canadian border...\nPort Sanilac to Port Huron MI...\nSt. Clair River...\n\n* Until 830 PM EDT.\n\n* At 705 PM EDT, strong thunderstorms were located along a line\nextending from 30 nm west of Lexington to 23 nm west of Lakeport to\nnear New Baltimore to St Clair Flats Old Channel Light, moving east\nat 40 knots.\n\nHAZARD...Wind gusts to nearly 50 knots.\n\nSOURCE...Radar.\n\nIMPACT...Small craft could be damaged in briefly higher winds and\nsuddenly higher waves.\n\n* Strong thunderstorms will be near...\nLakeport and Port Huron around 735 PM EDT.\nLexington around 740 PM EDT.\nPort Sanilac around 750 PM EDT.\n\nOther locations impacted by strong thunderstorms include\nRichmondville.\n\n## Instructions\nMove to safe harbor immediately as gusty winds and high waves are\nexpected."}