{"icao":"LSMA","name":"Alpnach Air Base","lat":46.9439,"lon":8.2842,"country":"CH","tz":"Europe/Zurich","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":91,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["December","November"],"monthlyHours":[19,8,4,2,1,0,0,1,1,9,18,30],"medianEventHours":2,"season":{"summary":"Fog season runs October through February, peaking in December; fog is mostly a 3 AM\u201310 AM phenomenon; typically thinning out by noon; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","October","November","December"],"timeOfDay":"3 AM\u201310 AM","typicallyClearsBy":"noon"}},"forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. September typically brings about 1 hour of dense fog here (10-year average)."},"links":{"page":"https://fogatlas.org/fog/lsma/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=LSMA","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/LSMA.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}