{"url_path":"/weather/alerts/2.49.0.1.840.0.b6fad801da48d2d35e961a0a716cadfca1032aca.001.1","section_key":"alert","section_title":"Frost Advisory issued September 21 at 12:59PM CDT until September 22 at 8:00AM CDT by NWS Duluth MN","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-21","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b6fad801da48d2d35e961a0a716cadfca1032aca.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Duluth MN"},"word_count":171,"has_tables":false,"body_markdown":"# Frost Advisory: Frost Advisory issued September 21 at 12:59PM CDT until September 22 at 8:00AM CDT by NWS Duluth MN\n\n**Severity:** Minor\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** Koochiching; North St. Louis; Northern Cook/Northern Lake; North Itasca; Central St. Louis; North Cass; South Itasca; Crow Wing; Northern Aitkin; South Aitkin; Carlton/South St. Louis; Pine; Douglas; Bayfield; Ashland; Iron; Burnett; Washburn; Sawyer; Price\n**Issued by:** NWS Duluth MN\n**Sent:** 2026-09-21T12:59:00-05:00\n**Effective:** 2026-09-21T12:59:00-05:00\n**Expires:** 2026-09-22T01:00:00-05:00\n\n## Description\n* WHAT...Temperatures as low as 34 will result in frost formation.\n\n* WHERE...In Minnesota, Crow Wing, Northern Aitkin, Pine, South\nAitkin, Koochiching, North Cass, North Itasca, South Itasca,\nCarlton and South St. Louis, Central St. Louis, North St. Louis,\nand Northern Cook and Lake Counties. In Wisconsin, Price, Ashland,\nBayfield, Burnett, Douglas, Iron, Sawyer, and Washburn Counties.\n\n* WHEN...From midnight tonight to 8 AM CDT Tuesday.\n\n* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive\noutdoor plants may be killed if left uncovered.\n\n* ADDITIONAL DETAILS...Advisory is for inland areas away from Lake\nSuperior.\n\n## Instructions\nTake steps now to protect tender plants from the cold."}