{"icao":"KTVF","name":"Thief River Falls Regional Airport","lat":48.0657,"lon":-96.185,"country":"US","tz":"America/Chicago","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":89,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","March"],"monthlyHours":[18,12,13,5,2,3,2,5,4,5,5,13],"medianEventHours":2,"season":{"summary":"Fog season is January, February, March, April, August, October, November, December, peaking in January; fog is mostly a 3 AM\u20139 AM phenomenon; typically thinning out by 1 PM; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","April","August","October","November","December"],"timeOfDay":"3 AM\u20139 AM","typicallyClearsBy":"1 PM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":5,"peakAtLocal":"2026-09-05T06:00:00-05:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 5%. September typically brings about 4 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/ktvf/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KTVF","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KTVF.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}