{"url_path":"/weather/alerts/2.49.0.1.840.0.0d8b59cd491eea72be5cabeb003ece2ee442b961.001.1","section_key":"alert","section_title":"Red Flag Warning issued May 17 at 12:07PM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-05-17","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.0d8b59cd491eea72be5cabeb003ece2ee442b961.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Sacramento CA"},"word_count":277,"has_tables":false,"body_markdown":"# Red Flag Warning: Red Flag Warning issued May 17 at 12:07PM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Expected\n**Areas:** South-Central Shasta County Including Redding Metro; Northern Sacramento Valley in Tehama County; Central Glenn County Including Interstate 5; Eastern Glenn County; Butte County Below 1000 ft; Central Colusa County Including Interstate 5; Eastern Colusa County; Sutter and Yuba Counties Below 1000 ft; Western Yolo County Including Capay Valley and Interstate 505; Central Yolo and Northeast Solano Counties Including Woodland and Davis; Sacramento Metro and Western El Dorado and Amador Counties; Central Solano County Including Fairfield and Vacaville; Southwestern Solano County Including Vallejo; Sacramento County Delta; San Joaquin County Delta; Central San Joaquin County Including Stockton Metro; Tracy Triangle Below 1000 ft; Northeastern San Joaquin Valley Below 1000 ft; Western Stanislaus County Below 1000 ft Including Interstate 5; Central Stanislaus County Including Modesto Metro\n**Issued by:** NWS Sacramento CA\n**Sent:** 2026-05-17T12:07:00-07:00\n**Effective:** 2026-05-17T12:07:00-07:00\n**Expires:** 2026-05-18T16:00:00-07:00\n\n## Description\n* Winds...North winds 20 to 30 mph. Gusts 35 to 45 mph, locally\nup to 50 mph around the Delta and the western Sacramento\nValley.\n\n* Humidity...Daytime minimum humidities of 7 to 15%. Overnight\nmaximum relative humidities of 20 to 45%.\n\n* Highest Threat...Along and west of the Interstate 5 corridor\nin the Sacramento Valley. Strongest winds are expected today.\n\n* Impacts...The combination of gusty winds and low humidity can\ncause fire to rapidly grow in size and intensity. Outdoor\nburning is not recommended.\n\n## Instructions\nA Red Flag Warning means that critical fire weather conditions\nare either occurring now, or will shortly. A combination of\nstrong winds, low relative humidity, and warm temperatures can\ncontribute to extreme fire behavior."}