{"url_path":"/weather/alerts/2.49.0.1.840.0.af887c14f2decd17a7973babb7b5924d75d69606.001.1","section_key":"alert","section_title":"Dense Smoke Advisory issued July 16 at 9:36AM CDT until July 17 at 4:00PM CDT by NWS Chicago IL","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-16","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.af887c14f2decd17a7973babb7b5924d75d69606.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Chicago IL"},"word_count":158,"has_tables":false,"body_markdown":"# Dense Smoke Advisory: Dense Smoke Advisory issued July 16 at 9:36AM CDT until July 17 at 4:00PM CDT by NWS Chicago IL\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Northerly Island to Calumet Harbor IL; Calumet Harbor IL to Gary IN; Gary to Burns Harbor IN; Burns Harbor to Michigan City IN\n**Issued by:** NWS Chicago IL\n**Sent:** 2026-07-16T09:36:00-05:00\n**Effective:** 2026-07-16T09:36:00-05:00\n**Expires:** 2026-07-16T17:45:00-05:00\n\n## Description\n* WHAT...Dense smoke will reduce visibility 1 NM or less at times.\n\n* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor\nto Northerly Island IL, Northerly Island to Calumet Harbor IL,\nCalumet Harbor IL to Gary IN, Gary to Burns Harbor IN and\nBurns Harbor to Michigan City IN.\n\n* WHEN...Until 4 PM CDT Friday.\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."}