{"url_path":"/weather/alerts/2.49.0.1.840.0.3ca2194b00a7c94b9f446d53954f5c41209392cc.001.1","section_key":"alert","section_title":"Dense Fog Advisory issued September 17 at 4:05PM EDT until September 17 at 8:00PM EDT by NWS Grand Rapids MI","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-17","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.3ca2194b00a7c94b9f446d53954f5c41209392cc.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Grand Rapids MI"},"word_count":101,"has_tables":false,"body_markdown":"# Dense Fog Advisory: Dense Fog Advisory issued September 17 at 4:05PM EDT until September 17 at 8:00PM EDT by NWS Grand Rapids MI\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** St Joseph to South Haven MI\n**Issued by:** NWS Grand Rapids MI\n**Sent:** 2026-09-17T16:05:00-04:00\n**Effective:** 2026-09-17T16:05:00-04:00\n**Expires:** 2026-09-17T20:00:00-04:00\n\n## Description\n* WHAT...Dense fog will reduce visibility to less than one half\nmile.\n\n* WHERE...St Joseph to South Haven MI.\n\n* WHEN...Until 8 PM EDT this evening.\n\n* IMPACTS...Low visibility will make navigation difficult.\n\n## Instructions\nIf you must navigate, proceed with caution. Use proper fog\nsignals. Make sure all running lights are on. Remember to use\nyour radar and compass."}