{"url_path":"/weather/alerts/2.49.0.1.840.0.74e1a93df3ddaa2a6558ecaeaa2a3bcd0a7a6fd0.002.1","section_key":"alert","section_title":"Frost Advisory issued May 19 at 11:14AM CDT until May 20 at 8:00AM CDT by NWS Sioux Falls SD","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-05-19","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.74e1a93df3ddaa2a6558ecaeaa2a3bcd0a7a6fd0.002.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Sioux Falls SD"},"word_count":147,"has_tables":false,"body_markdown":"# Frost Advisory: Frost Advisory issued May 19 at 11:14AM CDT until May 20 at 8:00AM CDT by NWS Sioux Falls SD\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Lyon; Osceola; Dickinson; Sioux; O'Brien; Clay; Plymouth; Cherokee; Buena Vista; Woodbury; Ida; Lincoln; Lyon; Murray; Cottonwood; Nobles; Jackson; Pipestone; Rock; Dixon; Dakota; Gregory; Miner; Lake; Moody; Brule; Aurora; Davison; Hanson; McCook; Minnehaha; Charles Mix; Douglas; Hutchinson; Turner; Lincoln; Bon Homme; Yankton; Clay; Union\n**Issued by:** NWS Sioux Falls SD\n**Sent:** 2026-05-19T11:14:00-05:00\n**Effective:** 2026-05-19T11:14:00-05:00\n**Expires:** 2026-05-19T21:00:00-05:00\n\n## Description\n* WHAT...Temperatures as low as 34 will result in frost\nformation.\n\n* WHERE...Portions of northwest and west central Iowa, southwest\nMinnesota, northeast Nebraska and east central, south central\nand southeast South Dakota.\n\n* WHEN...From 1 AM to 8 AM CDT Wednesday.\n\n* IMPACTS...Frost could kill sensitive outdoor vegetation if\nleft uncovered.\n\n## Instructions\nA Frost Advisory means that widespread frost is expected.\nSensitive outdoor plants may be killed if left uncovered."}