{"url_path":"/weather/alerts/2.49.0.1.840.0.8559e3b280a994089f93cfc728c6c06499a24d53.001.1","section_key":"alert","section_title":"Flash Flood Warning issued May 18 at 5:12PM CDT until May 18 at 8:15PM CDT by NWS St Louis MO","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-05-18","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.8559e3b280a994089f93cfc728c6c06499a24d53.001.1","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":269,"has_tables":false,"body_markdown":"# Flash Flood Warning: Flash Flood Warning issued May 18 at 5:12PM CDT until May 18 at 8:15PM CDT by NWS St Louis MO\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** St. Charles, MO; St. Louis, MO; St. Louis City, MO\n**Issued by:** NWS St Louis MO\n**Sent:** 2026-05-18T17:12:00-05:00\n**Effective:** 2026-05-18T17:12:00-05:00\n**Expires:** 2026-05-18T20:15:00-05:00\n\n## Description\nFFWLSX\n\nThe National Weather Service in St Louis has issued a\n\n* Flash Flood Warning for...\nSaint Charles County in east central Missouri...\nSaint Louis County in east central Missouri...\nSaint Louis City in east central Missouri...\n\n* Until 815 PM CDT.\n\n* At 512 PM CDT, Doppler radar indicated thunderstorms producing\nheavy rain across the warned area. Between 1 and 2 inches of rain\nhave fallen. Additional rainfall amounts of 0.5 to 2 inches are\npossible in the warned area. Flash flooding is ongoing or expected\nto begin shortly.\n\nHAZARD...Flash flooding caused by thunderstorms.\n\nSOURCE...Radar indicated.\n\nIMPACT...Flash flooding of small creeks and streams, urban areas,\nhighways, streets and underpasses as well as other poor\ndrainage and low-lying areas.\n\n* Some locations that will experience flash flooding include...\nSt. Louis, O'Fallon, St. Charles, St. Peters, Florissant,\nChesterfield, Wildwood, University City, Ballwin, Wentzville,\nKirkwood, Maryland Heights, Hazelwood, Webster Groves, Ferguson,\nManchester, Creve Coeur and Overland.\n\nThis includes the following State Parks...\nBabler Memorial State Park, Scott Joplin Historic Site, Route 66\nState Park, Castlewood State Park, Confluence State Park and First\nMissouri State Capitol Historic Site.\n\nThis includes the following highways...\nInterstate 70 in Missouri between exits 203 and 231. Interstate 44 in\nMissouri between exits 261 and 277.\n\n## Instructions\nTurn around, don't drown when encountering flooded roads. Most flood\ndeaths occur in vehicles."}