{"icao":"EHKD","name":"De Kooy Airfield / Den Helder Naval Air Station","lat":52.9234,"lon":4.7806,"country":"NL","tz":"Europe/Amsterdam","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":202,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["December","January"],"monthlyHours":[34,26,28,6,10,8,2,2,7,12,17,47],"medianEventHours":2,"season":{"summary":"Fog season runs October through March, peaking in December; fog here can hit at any hour of the day; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","October","November","December"],"timeOfDay":"any hour of the day","typicallyClearsBy":null}},"forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. September typically brings about 7 hours of dense fog here (10-year average)."},"links":{"page":"https://fogatlas.org/fog/ehkd/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=EHKD","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/EHKD.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}