{"schemaVersion":"WP-AIRPORT-OPERATIONS-1.0","airport":{"requested":"ORD","iata":"ORD","icao":"KORD"},"freshness":"near-real-time","observedAt":"2026-09-17T09:18:44.000Z","event":{"airportCode":"ORD","airportName":"Chicago OHare International","latitude":41.9742,"longitude":-87.9073,"observedAt":"2026-09-17T09:18:44.000Z","groundStop":{"active":true,"reason":"thunderstorms","averageDelayMinutes":null,"maximumDelayMinutes":null,"startsAt":"2026-09-17T09:04:00.000Z","endsAt":"2026-09-17T10:45:00.000Z","advisoryUrl":"https://www.fly.faa.gov/adv/adv_otherdis.jsp?advn=19&adv_date=09172026&facId=ORD&title=ATCSCC%20ADVZY%20019%20ORD/ZAU%2009/17/2026%20CDM%20GROUND%20STOP&titleDate=09/17/2026"},"groundDelayProgram":null,"airportClosure":null,"arrivalDelay":null,"departureDelay":null,"freeFormRestriction":null,"deicing":null,"runwayConfiguration":null,"status":"major-disruption","severity":3,"explanation":{"whatHappened":"The FAA currently reports a ground stop at ORD.","whyItMayBeHappening":"The FAA lists thunderstorms as the reported condition.","whyItMatters":"Airport-level restrictions can affect many flights, but they do not prove that a specific flight is delayed.","whatCouldHappenNext":"The event may be extended, reduced or canceled as traffic volume, runway capacity and weather change.","whatWouldImproveIt":"A withdrawn program, lower published delays or restored airport capacity would indicate improvement.","whatWouldMakeItWorse":"A longer restriction window, a ground stop, a closure or rising average delay would indicate deterioration.","observed":["FAA reports a ground stop."],"inferred":["Connecting flights and aircraft rotations may carry some disruption beyond this airport."],"unknown":["Airline-specific cancellations and gate changes are not included in this feed.","The feed does not establish the status or delay reason of every individual flight."]},"source":{"name":"FAA National Airspace System Status","url":"https://nasstatus.faa.gov/","scope":"United States airport-level traffic-management events"}},"noActiveEvent":false,"noActiveEventMeaning":null,"evaluationStatus":"covered","evaluationMeaning":"This airport is inside the normalized U.S. FAA airport-event coverage boundary.","unavailableFields":{"departuresDelayedPercent":null,"arrivalsDelayedPercent":null,"cancellationCount":null,"diversionCount":null,"holdingAircraftCount":null,"gateCongestion":null},"coverage":{"geography":"United States","scope":"FAA airport-level traffic-management events","limitation":"The FAA feed is airport-level and must not be treated as a flight-specific status source."},"source":{"name":"FAA National Airspace System Status","url":"https://nasstatus.faa.gov/","dataUrl":"https://nasstatus.faa.gov/api/airport-events"},"verification":{"airportAbsenceVerified":false,"feedEmptyVerified":false,"sourceReceipt":{"kind":"origin-http-date","observedAt":"2026-09-17T09:45:22.000Z","header":"Date"}},"retention":{"mode":"current"}}