{"url_path":"/weather/alerts/2.49.0.1.840.0.2f82514a3ca68f01757316aff49a6eed5d2ba5c6.001.1","section_key":"alert","section_title":"Freeze Warning issued May 18 at 11:49AM MDT until May 19 at 9:00AM MDT by NWS Rapid City SD","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-05-18","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.2f82514a3ca68f01757316aff49a6eed5d2ba5c6.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Rapid City SD"},"word_count":151,"has_tables":false,"body_markdown":"# Freeze Warning: Freeze Warning issued May 18 at 11:49AM MDT until May 19 at 9:00AM MDT by NWS Rapid City SD\n\n**Severity:** Moderate\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Harding; Northern Perkins; Butte; Northern Meade Co Plains; Ziebach; Northern Foothills; Rapid City; Southern Foothills; Custer Co Plains; Pennington Co Plains; Haakon; Western Fall River; Northern Oglala Lakota; Northern Jackson; Bennett; Sturgis/Piedmont Foothills; Southern Meade Co Plains; Hermosa Foothills; Eastern Fall River; Southern Oglala Lakota; Southern Jackson; Southern Perkins; Northern Campbell; Southern Campbell; Western Crook; Weston County Plains; Newcastle; Northeastern Crook\n**Issued by:** NWS Rapid City SD\n**Sent:** 2026-05-18T11:49:00-06:00\n**Effective:** 2026-05-18T11:49:00-06:00\n**Expires:** 2026-05-19T03:00:00-06:00\n\n## Description\n* WHAT...Sub-freezing temperatures as low as 28 expected.\n\n* WHERE...Portions of northwestern and southwestern South Dakota and\nnortheast Wyoming.\n\n* WHEN...From midnight tonight to 9 AM MDT Tuesday.\n\n* IMPACTS...Frost and freeze conditions could kill crops, other\nsensitive vegetation and possibly damage unprotected outdoor\nplumbing.\n\n## Instructions\nTake steps now to protect tender plants from the cold."}