{"url_path":"/weather/alerts/2.49.0.1.840.0.a1be87eaf8a05987e6679fd304c1dd91b86c9a42.007.1","section_key":"alert","section_title":"Frost Advisory issued May 18 at 12:00PM MDT until May 19 at 9:00AM MDT by NWS Missoula MT","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.a1be87eaf8a05987e6679fd304c1dd91b86c9a42.007.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Missoula MT"},"word_count":120,"has_tables":false,"body_markdown":"# Frost Advisory: Frost Advisory issued May 18 at 12:00PM MDT until May 19 at 9:00AM MDT by NWS Missoula MT\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Bitterroot/Sapphire Mountains\n**Issued by:** NWS Missoula MT\n**Sent:** 2026-05-18T12:00:00-06:00\n**Effective:** 2026-05-18T12:00:00-06:00\n**Expires:** 2026-05-19T09:00:00-06:00\n\n## Description\n* WHAT...Temperature ranges between 25 and 32 will result in frost\nformation.\n\n* WHERE...Bitterroot/Sapphire Mountains.\n\n* WHEN...From midnight tonight to 9 AM MDT Tuesday.\n\n* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive\noutdoor plants may be killed if left uncovered.\n\n* ADDITIONAL DETAILS...Temperature Ranges: 30 to 32 along US-12 west\nof Lolo, 26 to 29 degrees in the Rock Creek area, 26 to 28 Sula,\nand 25 to 28 in the Painted Rocks area.\n\n## Instructions\nTake steps now to protect tender plants from the cold."}