{"url_path":"/weather/alerts/2.49.0.1.840.0.04f34938ed2bd1d8c929780635c3f4bd569b9d90.001.1","section_key":"alert","section_title":"Air Quality Alert issued September 17 at 3:27PM CDT by NWS St Louis MO","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-17","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.04f34938ed2bd1d8c929780635c3f4bd569b9d90.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS St Louis MO"},"word_count":193,"has_tables":false,"body_markdown":"# Air Quality Alert: Air Quality Alert issued September 17 at 3:27PM CDT by NWS St Louis MO\n\n**Severity:** Unknown\n**Certainty:** Unknown\n**Urgency:** Unknown\n**Areas:** Madison; St. Clair; Monroe; St. Charles; Franklin; St. Louis; St. Louis City; Jefferson\n**Issued by:** NWS St Louis MO\n**Sent:** 2026-09-17T15:27:00-05:00\n**Effective:** 2026-09-17T15:27:00-05:00\n**Expires:** 2026-09-18T20:00:00-05:00\n\n## Description\nThe St. Louis Clean Air Partnership has issued an air quality alert\nfor the St. Louis metropolitan area from 10 AM to 8 PM CDT Friday.\n\nAn Orange air quality forecast means that maximum ozone\nconcentrations are expected to reach levels that pose a health risk.\nAdverse health effects increase as air quality deteriorates. Ground-\nlevel ozone is an air contaminant which can cause breathing\ndifficulties for children, older adults, as well as persons with\nrespiratory problems.\n\nReducing outdoor physical activity is recommended. If it is a\nregularly scheduled work day you are urged to consider\ntelecommuting, carpooling, or utilizing public transit. Avoid\nexcessive idling and do not top off when refueling motor vehicles.\nThe use of gasoline-powered lawn equipment should be reduced or\npostponed until late in the day.\n\nFor more information visit the St. Louis Clean Air Partnership at\nhttp://cleanair-stlouis.com/\n\nFor current Air Quality Index (AQI) values visit\nhttps://www.airnow.gov/"}