{"city":"Grand Rapids","region":"US-MI","country":"US","slug":"grand-rapids-mi","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"KGRR","name":"Gerald R. Ford International Airport","subCat1HoursPerYear":46,"forecast":"verifying"}],"primaryStation":"KGRR","forecast":{"covered":true,"public":false,"cycle":"2026-08-16T00:00:00Z","guidanceSignal":false,"wording":"No fog signal in NWS guidance for the next 48 hours. August typically brings about 3 hours of dense fog here."},"climatology":{"subCat1HoursPerYear":46,"fogSeasonPeakMonths":["January","December"],"medianEventHours":2,"season":{"summary":"Fog season runs August through April, peaking in January; fog is mostly a 4 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","September","October","November","December"],"timeOfDay":"4 AM\u20139 AM","typicallyClearsBy":"1 PM"}},"links":{"page":"https://fogatlas.org/fog/city/grand-rapids-mi/","stationPages":["https://fogatlas.org/fog/kgrr/"],"verification":"https://fogatlas.org/fog/scorecard/"}}