{"items":[{"id":9199,"event_id":4051,"slug":"4051-ground-stop","kind":"initial","kind_label":"Initial","evidence":"confirmed","evidence_label":"Confirmed","evidence_help":"An official source reports it. We attribute it; we do not independently verify it.","severity":"major","severity_label":"Major","severity_rank":3,"event_type":"ground_stop","type_label":"Ground stop","headline":"FAA advisory: “NATIONAL GROUND STOP”","body":"The FAA issued this advisory: “EVENT TIME: 13/2053 - 14/0400 DUE TO EXTRAORDINARY CIRCUMSTANCES AND FOR REASONS OF SAFETY. ATTENTION ALL AIRCRAFT OPERATORS, BY ORDER OF THE FEDERAL AVIATION COMMAND CENTER ALL AIRPORTS ARE GROUND STOPPED. ALL DEPARTING TRAFFIC SHOULD REMAIN GROUND STOPPED UNTIL FURTHER NOTICE. INBOUND INTERNATIONAL FLIGHTS WILL BE MANAGED ON A CASE BY CASE BASIS.” This is an advisory bulletin; its text defines the affected flights and time period.","what_changed":null,"airports":[],"metros":[],"direction":"both","direction_label":"arrivals and departures","published":{"utc":"2026-11-13T20:59:51.502483Z","time":"3:59 PM","zone":"EST","date":"Nov 13","ago":"21 min ago","full":"Fri Nov 13, 3:59 PM EST","utc_text":"2026-11-13 20:59 UTC"},"source_event":null,"ingested":{"utc":"2026-11-13T20:57:28.498000Z","time":"3:57 PM","zone":"EST","date":"Nov 13","ago":"23 min ago","full":"Fri Nov 13, 3:57 PM EST","utc_text":"2026-11-13 20:57 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"faa_advisories faa-advisories-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QyMDo1OTo1MS41MDI0ODMrMDA6MDB8OTE5OQ","lifecycle":"new","has_correction":false,"has_retraction":false,"update_count":1,"latest_update_id":9199,"status_label":"New","n_match":1,"sources":[{"label":"FAA ATCSCC advisory","url":"https://www.fly.faa.gov/adv/adv_otherdis?adv_date=11132026&advn=111","role":"primary","source":"faa_advisory"}],"corrections":[]},{"id":9196,"event_id":4048,"slug":"4048-restriction","kind":"initial","kind_label":"Initial","evidence":"confirmed","evidence_label":"Confirmed","evidence_help":"An official source reports it. We attribute it; we do not independently verify it.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"traffic_restriction","type_label":"Traffic restriction","headline":"FAA advisory: “ALL AIRPORTS DIVERSION RECOVERY ACTIVATED”","body":"The FAA issued this advisory: “EVENT TIME: 13/2030 - 14/0500 THE ATCSCC HAS ACTIVATED THE DIVERSION RECOVERY TOOL FOR ALL AIRPORTS. CUSTOMERS SHOULD ENSURE THAT DVRSN IS INCLUDED IN FLIGHT PLAN REMARKS OF DIVERTED AIRCRAFT. NOTE THAT IF THERE IS A GROUND DELAY PROGRAM OR GROUND STOP IN EFFECT FOR THE DESTINATION AIRPORT DIVERTED FLIGHTS ARE NOT AUTOMATICALLY EXEMPT AND WILL STILL RECEIVE AN EDCT. UNLESS OTHERWISE NOTIFIED, DIVERSION RECOVERY WILL CLOSE AT THE END OF THE EVENT TIME SPECIFIED IN THIS ADVISORY.” This is an advisory bulletin; its text defines the affected flights and time period.","what_changed":null,"airports":[],"metros":[],"direction":"both","direction_label":"arrivals and departures","published":{"utc":"2026-11-13T20:56:45.215014Z","time":"3:56 PM","zone":"EST","date":"Nov 13","ago":"24 min ago","full":"Fri Nov 13, 3:56 PM EST","utc_text":"2026-11-13 20:56 UTC"},"source_event":null,"ingested":{"utc":"2026-11-13T20:52:58.693000Z","time":"3:52 PM","zone":"EST","date":"Nov 13","ago":"27 min ago","full":"Fri Nov 13, 3:52 PM EST","utc_text":"2026-11-13 20:52 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"faa_advisories faa-advisories-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QyMDo1Njo0NS4yMTUwMTQrMDA6MDB8OTE5Ng","lifecycle":"new","has_correction":false,"has_retraction":false,"update_count":1,"latest_update_id":9196,"status_label":"New","n_match":1,"sources":[{"label":"FAA ATCSCC advisory","url":"https://www.fly.faa.gov/adv/adv_otherdis?adv_date=11132026&advn=108","role":"primary","source":"faa_advisory"}],"corrections":[]},{"id":9138,"event_id":4014,"slug":"4014-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City arrivals running late: 46% reached the gate 15+ min late in the last hour","body":"Of 13 arrivals that landed between 12:45 PM and 1:45 PM MST, 6 reached the gate at least 15 minutes late. Typically 15% of arrivals at Salt Lake City arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"arrivals","direction_label":"arrivals","published":{"utc":"2026-11-13T20:45:57.107611Z","time":"1:45 PM","zone":"MST","date":"Nov 13","ago":"35 min ago","full":"Fri Nov 13, 1:45 PM MST","utc_text":"2026-11-13 20:45 UTC"},"source_event":{"utc":"2026-11-13T20:45:00Z","time":"1:45 PM","zone":"MST","date":"Nov 13","ago":"35 min ago","full":"Fri Nov 13, 1:45 PM MST","utc_text":"2026-11-13 20:45 UTC"},"ingested":{"utc":"2026-11-13T20:45:56.449638Z","time":"1:45 PM","zone":"MST","date":"Nov 13","ago":"35 min ago","full":"Fri Nov 13, 1:45 PM MST","utc_text":"2026-11-13 20:45 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QyMDo0NTo1Ny4xMDc2MTErMDA6MDB8OTEzOA","measurement":{"window":"12:45 PM–1:45 PM MST","n":13,"late_n":6,"share_pct":"46%","baseline_pct":"15%","baseline_basis":"US DOT on-time data, last 12 published months, all arrivals","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":8.0},"lifecycle":"new","has_correction":false,"has_retraction":false,"update_count":1,"latest_update_id":9138,"status_label":"New","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":8846,"event_id":3886,"slug":"3886-slc-delays","kind":"resolution","kind_label":"Resolution","evidence":"forecast","evidence_label":"Forecast","evidence_help":"Tailodds' model predicts it. It has not happened.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Model lowers Salt Lake City departure delay risk noon–3 PM Friday to 28%, near normal","body":"Tailodds’ model gives the 36 departures scheduled from Salt Lake City noon–3 PM Friday an average 28% chance of leaving 15+ minutes late. With calm weather the same flights would average 18%. From the 3:00 AM MST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.","what_changed":"48% → 28%; calm-weather level 18%","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-13T10:57:45.421298Z","time":"3:57 AM","zone":"MST","date":"Nov 13","ago":"10 h ago","full":"Fri Nov 13, 3:57 AM MST","utc_text":"2026-11-13 10:57 UTC"},"source_event":{"utc":"2026-11-13T10:00:00Z","time":"3:00 AM","zone":"MST","date":"Nov 13","ago":"11 h ago","full":"Fri Nov 13, 3:00 AM MST","utc_text":"2026-11-13 10:00 UTC"},"ingested":{"utc":"2026-11-13T10:57:44.821486Z","time":"3:57 AM","zone":"MST","date":"Nov 13","ago":"10 h ago","full":"Fri Nov 13, 3:57 AM MST","utc_text":"2026-11-13 10:57 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"forecast_blocks forecast-blocks-v1","config_version":"2026-10-17.1","model_version":"famB-sd-v4i","corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QxMDo1Nzo0NS40MjEyOTgrMDA6MDB8ODg0Ng","forecast":{"p_pct":"28%","expected_cancellations":0.1,"target":"SLC departures noon–3 PM 2026-11-13 (15+ min late)","horizon_h":8.0,"model_version":"famB-sd-v4i","model_changed":false,"calibration":"isotonic (model/train_forecast.py)","n":36,"cycle":{"utc":"2026-11-13T10:00:00Z","time":"3:00 AM","zone":"MST","date":"Nov 13","ago":"11 h ago","full":"Fri Nov 13, 3:00 AM MST","utc_text":"2026-11-13 10:00 UTC"}},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8846,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds forecast","url":null,"role":"primary","source":"tailodds_forecast"}],"corrections":[]},{"id":8819,"event_id":3886,"slug":"3886-slc-delays","kind":"initial","kind_label":"Initial","evidence":"forecast","evidence_label":"Forecast","evidence_help":"Tailodds' model predicts it. It has not happened.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Model forecasts 48% delay risk for Salt Lake City departures noon–3 PM Friday","body":"Tailodds’ model gives the 36 departures scheduled from Salt Lake City noon–3 PM Friday an average 48% chance of leaving 15+ minutes late. With calm weather the same flights would average 19%. From the 2:00 AM MST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-13T09:58:53.965066Z","time":"2:58 AM","zone":"MST","date":"Nov 13","ago":"11 h ago","full":"Fri Nov 13, 2:58 AM MST","utc_text":"2026-11-13 09:58 UTC"},"source_event":{"utc":"2026-11-13T09:00:00Z","time":"2:00 AM","zone":"MST","date":"Nov 13","ago":"12 h ago","full":"Fri Nov 13, 2:00 AM MST","utc_text":"2026-11-13 09:00 UTC"},"ingested":{"utc":"2026-11-13T09:58:50.141420Z","time":"2:58 AM","zone":"MST","date":"Nov 13","ago":"11 h ago","full":"Fri Nov 13, 2:58 AM MST","utc_text":"2026-11-13 09:58 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"forecast_blocks forecast-blocks-v1","config_version":"2026-10-17.1","model_version":"famB-sd-v4i","corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QwOTo1ODo1My45NjUwNjYrMDA6MDB8ODgxOQ","forecast":{"p_pct":"48%","expected_cancellations":0.2,"target":"SLC departures noon–3 PM 2026-11-13 (15+ min late)","horizon_h":9.0,"model_version":"famB-sd-v4i","model_changed":false,"calibration":"isotonic (model/train_forecast.py)","n":36,"cycle":{"utc":"2026-11-13T09:00:00Z","time":"2:00 AM","zone":"MST","date":"Nov 13","ago":"12 h ago","full":"Fri Nov 13, 2:00 AM MST","utc_text":"2026-11-13 09:00 UTC"}},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8846,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds forecast","url":null,"role":"primary","source":"tailodds_forecast"}],"corrections":[],"newer":{"id":8846,"kind":"Resolution","evidence":"forecast","evidence_label":"Forecast","severity_label":"Informational","headline":"Model lowers Salt Lake City departure delay risk noon–3 PM Friday to 28%, near normal","published":{"utc":"2026-11-13T10:57:45.421298Z","time":"3:57 AM","zone":"MST","date":"Nov 13","ago":"10 h ago","full":"Fri Nov 13, 3:57 AM MST","utc_text":"2026-11-13 10:57 UTC"}}},{"id":8734,"event_id":3852,"slug":"3852-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City arrivals running late: 53% reached the gate 15+ min late in the last hour","body":"Of 19 arrivals that landed between 9:52 PM and 10:52 PM MST, 10 reached the gate at least 15 minutes late. Typically 15% of arrivals at Salt Lake City arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"arrivals","direction_label":"arrivals","published":{"utc":"2026-11-13T05:52:52.729109Z","time":"10:52 PM","zone":"MST","date":"Nov 12","ago":"15 h ago","full":"Thu Nov 12, 10:52 PM MST","utc_text":"2026-11-13 05:52 UTC"},"source_event":{"utc":"2026-11-13T05:52:00Z","time":"10:52 PM","zone":"MST","date":"Nov 12","ago":"15 h ago","full":"Thu Nov 12, 10:52 PM MST","utc_text":"2026-11-13 05:52 UTC"},"ingested":{"utc":"2026-11-13T05:52:52.324058Z","time":"10:52 PM","zone":"MST","date":"Nov 12","ago":"15 h ago","full":"Thu Nov 12, 10:52 PM MST","utc_text":"2026-11-13 05:52 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QwNTo1Mjo1Mi43MjkxMDkrMDA6MDB8ODczNA","measurement":{"window":"9:52 PM–10:52 PM MST","n":19,"late_n":10,"share_pct":"53%","baseline_pct":"15%","baseline_basis":"US DOT on-time data, last 12 published months, all arrivals","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":16.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":1,"latest_update_id":8734,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":8715,"event_id":3840,"slug":"3840-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City arrivals back near normal: 17% late in the last hour","body":"Of 18 arrivals that landed between 9:04 PM and 10:04 PM MST, 3 reached the gate at least 15 minutes late. Typically 15% of arrivals at Salt Lake City arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 25% for 31 minutes across 16 checks, each with at least 12 flights and current data.","what_changed":"late share 60% at worst → 17% now","airports":["SLC"],"metros":[],"direction":"arrivals","direction_label":"arrivals","published":{"utc":"2026-11-13T05:04:06.948586Z","time":"10:04 PM","zone":"MST","date":"Nov 12","ago":"16 h ago","full":"Thu Nov 12, 10:04 PM MST","utc_text":"2026-11-13 05:04 UTC"},"source_event":{"utc":"2026-11-13T05:04:00Z","time":"10:04 PM","zone":"MST","date":"Nov 12","ago":"16 h ago","full":"Thu Nov 12, 10:04 PM MST","utc_text":"2026-11-13 05:04 UTC"},"ingested":{"utc":"2026-11-13T05:04:06.564840Z","time":"10:04 PM","zone":"MST","date":"Nov 12","ago":"16 h ago","full":"Thu Nov 12, 10:04 PM MST","utc_text":"2026-11-13 05:04 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QwNTowNDowNi45NDg1ODYrMDA6MDB8ODcxNQ","measurement":{"window":"9:04 PM–10:04 PM MST","n":18,"late_n":3,"share_pct":"17%","baseline_pct":"15%","baseline_basis":"US DOT on-time data, last 12 published months, all arrivals","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":-14.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8715,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":8681,"event_id":3840,"slug":"3840-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City arrivals running late: 56% reached the gate 15+ min late in the last hour","body":"Of 16 arrivals that landed between 8:02 PM and 9:02 PM MST, 9 reached the gate at least 15 minutes late. Typically 15% of arrivals at Salt Lake City arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"arrivals","direction_label":"arrivals","published":{"utc":"2026-11-13T04:02:53.182896Z","time":"9:02 PM","zone":"MST","date":"Nov 12","ago":"17 h ago","full":"Thu Nov 12, 9:02 PM MST","utc_text":"2026-11-13 04:02 UTC"},"source_event":{"utc":"2026-11-13T04:02:00Z","time":"9:02 PM","zone":"MST","date":"Nov 12","ago":"17 h ago","full":"Thu Nov 12, 9:02 PM MST","utc_text":"2026-11-13 04:02 UTC"},"ingested":{"utc":"2026-11-13T04:02:52.399853Z","time":"9:02 PM","zone":"MST","date":"Nov 12","ago":"17 h ago","full":"Thu Nov 12, 9:02 PM MST","utc_text":"2026-11-13 04:02 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xM1QwNDowMjo1My4xODI4OTYrMDA6MDB8ODY4MQ","measurement":{"window":"8:02 PM–9:02 PM MST","n":16,"late_n":9,"share_pct":"56%","baseline_pct":"15%","baseline_basis":"US DOT on-time data, last 12 published months, all arrivals","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":20.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8715,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[],"newer":{"id":8715,"kind":"Recovery","evidence":"observed","evidence_label":"Observed","severity_label":"Informational","headline":"Salt Lake City arrivals back near normal: 17% late in the last hour","published":{"utc":"2026-11-13T05:04:06.948586Z","time":"10:04 PM","zone":"MST","date":"Nov 12","ago":"16 h ago","full":"Thu Nov 12, 10:04 PM MST","utc_text":"2026-11-13 05:04 UTC"}}},{"id":8154,"event_id":3565,"slug":"3565-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures back near normal: 9% late in the last hour","body":"Of 22 departures that took off between 9:17 AM and 10:17 AM MST, 2 left at least 15 minutes late. Salt Lake City typically sees 11% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 9 AM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 21% for 31 minutes across 16 checks, each with at least 12 flights and current data.","what_changed":"late share 58% at worst → 9% now","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-11T17:17:55.323670Z","time":"10:17 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 10:17 AM MST","utc_text":"2026-11-11 17:17 UTC"},"source_event":{"utc":"2026-11-11T17:17:00Z","time":"10:17 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 10:17 AM MST","utc_text":"2026-11-11 17:17 UTC"},"ingested":{"utc":"2026-11-11T17:17:54.817260Z","time":"10:17 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 10:17 AM MST","utc_text":"2026-11-11 17:17 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xMVQxNzoxNzo1NS4zMjM2NzArMDA6MDB8ODE1NA","measurement":{"window":"9:17 AM–10:17 AM MST","n":22,"late_n":2,"share_pct":"9%","baseline_pct":"11%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 9 AM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":-5.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8154,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":8152,"event_id":3565,"slug":"3565-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures running late: 54% left 15+ min late in the last hour","body":"Of 13 departures that took off between 8:24 AM and 9:24 AM MST, 7 left at least 15 minutes late. Salt Lake City typically sees 8% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 8 AM hour). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-11T16:24:48.247182Z","time":"9:24 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 9:24 AM MST","utc_text":"2026-11-11 16:24 UTC"},"source_event":{"utc":"2026-11-11T16:24:00Z","time":"9:24 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 9:24 AM MST","utc_text":"2026-11-11 16:24 UTC"},"ingested":{"utc":"2026-11-11T16:24:47.668222Z","time":"9:24 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 9:24 AM MST","utc_text":"2026-11-11 16:24 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0xMVQxNjoyNDo0OC4yNDcxODIrMDA6MDB8ODE1Mg","measurement":{"window":"8:24 AM–9:24 AM MST","n":13,"late_n":7,"share_pct":"54%","baseline_pct":"8%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 8 AM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":15.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8154,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[],"newer":{"id":8154,"kind":"Recovery","evidence":"observed","evidence_label":"Observed","severity_label":"Informational","headline":"Salt Lake City departures back near normal: 9% late in the last hour","published":{"utc":"2026-11-11T17:17:55.323670Z","time":"10:17 AM","zone":"MST","date":"Nov 11","ago":"2 days ago","full":"Wed Nov 11, 10:17 AM MST","utc_text":"2026-11-11 17:17 UTC"}}},{"id":8081,"event_id":3537,"slug":"3537-slc-delays","kind":"resolution","kind_label":"Resolution","evidence":"forecast","evidence_label":"Forecast","evidence_help":"Tailodds' model predicts it. It has not happened.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Model lowers Salt Lake City departure delay risk noon–3 PM Tuesday to 19%, near normal","body":"Tailodds’ model gives the 38 departures scheduled from Salt Lake City noon–3 PM Tuesday an average 19% chance of leaving 15+ minutes late. With calm weather the same flights would average 13%. From the 3:00 AM MST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.","what_changed":"41% → 19%; calm-weather level 13%","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-10T11:27:18.128576Z","time":"4:27 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 4:27 AM MST","utc_text":"2026-11-10 11:27 UTC"},"source_event":{"utc":"2026-11-10T10:00:00Z","time":"3:00 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 3:00 AM MST","utc_text":"2026-11-10 10:00 UTC"},"ingested":{"utc":"2026-11-10T11:27:15.925864Z","time":"4:27 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 4:27 AM MST","utc_text":"2026-11-10 11:27 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"forecast_blocks forecast-blocks-v1","config_version":"2026-10-17.1","model_version":"famB-sd-v4i","corrects_update_id":null,"cursor":"MjAyNi0xMS0xMFQxMToyNzoxOC4xMjg1NzYrMDA6MDB8ODA4MQ","forecast":{"p_pct":"19%","expected_cancellations":0.1,"target":"SLC departures noon–3 PM 2026-11-10 (15+ min late)","horizon_h":7.5,"model_version":"famB-sd-v4i","model_changed":false,"calibration":"isotonic (model/train_forecast.py)","n":38,"cycle":{"utc":"2026-11-10T10:00:00Z","time":"3:00 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 3:00 AM MST","utc_text":"2026-11-10 10:00 UTC"}},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8081,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds forecast","url":null,"role":"primary","source":"tailodds_forecast"}],"corrections":[]},{"id":8075,"event_id":3537,"slug":"3537-slc-delays","kind":"initial","kind_label":"Initial","evidence":"forecast","evidence_label":"Forecast","evidence_help":"Tailodds' model predicts it. 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This is a forecast, not a report of delays.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-10T10:06:08.581122Z","time":"3:06 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 3:06 AM MST","utc_text":"2026-11-10 10:06 UTC"},"source_event":{"utc":"2026-11-10T09:00:00Z","time":"2:00 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 2:00 AM MST","utc_text":"2026-11-10 09:00 UTC"},"ingested":{"utc":"2026-11-10T10:05:59.273360Z","time":"3:05 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 3:05 AM MST","utc_text":"2026-11-10 10:05 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"forecast_blocks forecast-blocks-v1","config_version":"2026-10-17.1","model_version":"famB-sd-v4i","corrects_update_id":null,"cursor":"MjAyNi0xMS0xMFQxMDowNjowOC41ODExMjIrMDA6MDB8ODA3NQ","forecast":{"p_pct":"41%","expected_cancellations":0.2,"target":"SLC departures noon–3 PM 2026-11-10 (15+ min late)","horizon_h":8.9,"model_version":"famB-sd-v4i","model_changed":false,"calibration":"isotonic (model/train_forecast.py)","n":38,"cycle":{"utc":"2026-11-10T09:00:00Z","time":"2:00 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 2:00 AM MST","utc_text":"2026-11-10 09:00 UTC"}},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":8081,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds forecast","url":null,"role":"primary","source":"tailodds_forecast"}],"corrections":[],"newer":{"id":8081,"kind":"Resolution","evidence":"forecast","evidence_label":"Forecast","severity_label":"Informational","headline":"Model lowers Salt Lake City departure delay risk noon–3 PM Tuesday to 19%, near normal","published":{"utc":"2026-11-10T11:27:18.128576Z","time":"4:27 AM","zone":"MST","date":"Nov 10","ago":"3 days ago","full":"Tue Nov 10, 4:27 AM MST","utc_text":"2026-11-10 11:27 UTC"}}},{"id":7942,"event_id":3481,"slug":"3481-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City arrivals back near normal: 0% late in the last hour","body":"Of 24 arrivals that landed between 1:40 PM and 2:40 PM MST, 0 reached the gate at least 15 minutes late. Typically 15% of arrivals at Salt Lake City arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 25% for 31 minutes across 16 checks, each with at least 12 flights and current data.","what_changed":"late share 54% at worst → 0% now","airports":["SLC"],"metros":[],"direction":"arrivals","direction_label":"arrivals","published":{"utc":"2026-11-09T21:40:52.936627Z","time":"2:40 PM","zone":"MST","date":"Nov 9","ago":"3 days ago","full":"Mon Nov 9, 2:40 PM MST","utc_text":"2026-11-09 21:40 UTC"},"source_event":{"utc":"2026-11-09T21:40:00Z","time":"2:40 PM","zone":"MST","date":"Nov 9","ago":"3 days ago","full":"Mon Nov 9, 2:40 PM MST","utc_text":"2026-11-09 21:40 UTC"},"ingested":{"utc":"2026-11-09T21:40:51.753843Z","time":"2:40 PM","zone":"MST","date":"Nov 9","ago":"3 days ago","full":"Mon Nov 9, 2:40 PM MST","utc_text":"2026-11-09 21:40 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOVQyMTo0MDo1Mi45MzY2MjcrMDA6MDB8Nzk0Mg","measurement":{"window":"1:40 PM–2:40 PM MST","n":24,"late_n":0,"share_pct":"0%","baseline_pct":"15%","baseline_basis":"US DOT on-time data, last 12 published months, all arrivals","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":-14.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7942,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":7928,"event_id":3481,"slug":"3481-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City arrivals running late: 54% reached the gate 15+ min late in the last hour","body":"Of 13 arrivals that landed between 12:42 PM and 1:42 PM MST, 7 reached the gate at least 15 minutes late. Typically 15% of arrivals at Salt Lake City arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"arrivals","direction_label":"arrivals","published":{"utc":"2026-11-09T20:42:38.423456Z","time":"1:42 PM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 1:42 PM MST","utc_text":"2026-11-09 20:42 UTC"},"source_event":{"utc":"2026-11-09T20:42:00Z","time":"1:42 PM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 1:42 PM MST","utc_text":"2026-11-09 20:42 UTC"},"ingested":{"utc":"2026-11-09T20:42:36.827423Z","time":"1:42 PM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 1:42 PM MST","utc_text":"2026-11-09 20:42 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOVQyMDo0MjozOC40MjM0NTYrMDA6MDB8NzkyOA","measurement":{"window":"12:42 PM–1:42 PM MST","n":13,"late_n":7,"share_pct":"54%","baseline_pct":"15%","baseline_basis":"US DOT on-time data, last 12 published months, all arrivals","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":16.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7942,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[],"newer":{"id":7942,"kind":"Recovery","evidence":"observed","evidence_label":"Observed","severity_label":"Informational","headline":"Salt Lake City arrivals back near normal: 0% late in the last hour","published":{"utc":"2026-11-09T21:40:52.936627Z","time":"2:40 PM","zone":"MST","date":"Nov 9","ago":"3 days ago","full":"Mon Nov 9, 2:40 PM MST","utc_text":"2026-11-09 21:40 UTC"}}},{"id":7880,"event_id":3439,"slug":"3439-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures back near normal: 7% late in the last hour","body":"Of 28 departures that took off between 9:29 AM and 10:29 AM MST, 2 left at least 15 minutes late. Salt Lake City typically sees 11% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 9 AM hour). Measured by Tailodds from FAA flight data against airline schedules. 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Salt Lake City typically sees 8% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 8 AM hour). 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It has not happened.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Model lowers Salt Lake City departure delay risk noon–3 PM Monday to 24%, near normal","body":"Tailodds’ model gives the 36 departures scheduled from Salt Lake City noon–3 PM Monday an average 24% chance of leaving 15+ minutes late. With calm weather the same flights would average 17%. From the 3:00 AM MST forecast (model famB-sd-v4i). 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This is a forecast, not a report of delays.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-09T10:03:19.223518Z","time":"3:03 AM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 3:03 AM MST","utc_text":"2026-11-09 10:03 UTC"},"source_event":{"utc":"2026-11-09T09:00:00Z","time":"2:00 AM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 2:00 AM MST","utc_text":"2026-11-09 09:00 UTC"},"ingested":{"utc":"2026-11-09T10:03:15.392724Z","time":"3:03 AM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 3:03 AM MST","utc_text":"2026-11-09 10:03 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"forecast_blocks forecast-blocks-v1","config_version":"2026-10-17.1","model_version":"famB-sd-v4i","corrects_update_id":null,"cursor":"MjAyNi0xMS0wOVQxMDowMzoxOS4yMjM1MTgrMDA6MDB8Nzg0OA","forecast":{"p_pct":"49%","expected_cancellations":0.2,"target":"SLC departures noon–3 PM 2026-11-09 (15+ min late)","horizon_h":8.9,"model_version":"famB-sd-v4i","model_changed":false,"calibration":"isotonic (model/train_forecast.py)","n":36,"cycle":{"utc":"2026-11-09T09:00:00Z","time":"2:00 AM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 2:00 AM MST","utc_text":"2026-11-09 09:00 UTC"}},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7853,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds forecast","url":null,"role":"primary","source":"tailodds_forecast"}],"corrections":[],"newer":{"id":7853,"kind":"Resolution","evidence":"forecast","evidence_label":"Forecast","severity_label":"Informational","headline":"Model lowers Salt Lake City departure delay risk noon–3 PM Monday to 24%, near normal","published":{"utc":"2026-11-09T11:27:59.739517Z","time":"4:27 AM","zone":"MST","date":"Nov 9","ago":"4 days ago","full":"Mon Nov 9, 4:27 AM MST","utc_text":"2026-11-09 11:27 UTC"}}},{"id":7755,"event_id":3379,"slug":"3379-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures back near normal: 14% late in the last hour","body":"Of 28 departures that took off between 5:11 PM and 6:11 PM MST, 4 left at least 15 minutes late. Salt Lake City typically sees 19% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 5 PM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 29% for 31 minutes across 16 checks, each with at least 12 flights and current data.","what_changed":"late share 58% at worst → 14% now","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-09T01:11:17.340103Z","time":"6:11 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 6:11 PM MST","utc_text":"2026-11-09 01:11 UTC"},"source_event":{"utc":"2026-11-09T01:11:00Z","time":"6:11 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 6:11 PM MST","utc_text":"2026-11-09 01:11 UTC"},"ingested":{"utc":"2026-11-09T01:11:15.658179Z","time":"6:11 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 6:11 PM MST","utc_text":"2026-11-09 01:11 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOVQwMToxMToxNy4zNDAxMDMrMDA6MDB8Nzc1NQ","measurement":{"window":"5:11 PM–6:11 PM MST","n":28,"late_n":4,"share_pct":"14%","baseline_pct":"19%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 5 PM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":-1.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7755,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":7745,"event_id":3379,"slug":"3379-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures running late: 58% left 15+ min late in the last hour","body":"Of 12 departures that took off between 4:23 PM and 5:23 PM MST, 7 left at least 15 minutes late. Salt Lake City typically sees 22% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 4 PM hour). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-09T00:23:36.635518Z","time":"5:23 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 5:23 PM MST","utc_text":"2026-11-09 00:23 UTC"},"source_event":{"utc":"2026-11-09T00:23:00Z","time":"5:23 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 5:23 PM MST","utc_text":"2026-11-09 00:23 UTC"},"ingested":{"utc":"2026-11-09T00:23:35.404187Z","time":"5:23 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 5:23 PM MST","utc_text":"2026-11-09 00:23 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOVQwMDoyMzozNi42MzU1MTgrMDA6MDB8Nzc0NQ","measurement":{"window":"4:23 PM–5:23 PM MST","n":12,"late_n":7,"share_pct":"58%","baseline_pct":"22%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 4 PM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":23.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7755,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[],"newer":{"id":7755,"kind":"Recovery","evidence":"observed","evidence_label":"Observed","severity_label":"Informational","headline":"Salt Lake City departures back near normal: 14% late in the last hour","published":{"utc":"2026-11-09T01:11:17.340103Z","time":"6:11 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 6:11 PM MST","utc_text":"2026-11-09 01:11 UTC"}}},{"id":7719,"event_id":3358,"slug":"3358-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures back near normal: 0% late in the last hour","body":"Of 18 departures that took off between 2:49 PM and 3:49 PM MST, 0 left at least 15 minutes late. Salt Lake City typically sees 16% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 3 PM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 26% for 31 minutes across 16 checks, each with at least 12 flights and current data.","what_changed":"late share 56% at worst → 0% now","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-08T22:49:58.234358Z","time":"3:49 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 3:49 PM MST","utc_text":"2026-11-08 22:49 UTC"},"source_event":{"utc":"2026-11-08T22:49:00Z","time":"3:49 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 3:49 PM MST","utc_text":"2026-11-08 22:49 UTC"},"ingested":{"utc":"2026-11-08T22:49:57.479627Z","time":"3:49 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 3:49 PM MST","utc_text":"2026-11-08 22:49 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOFQyMjo0OTo1OC4yMzQzNTgrMDA6MDB8NzcxOQ","measurement":{"window":"2:49 PM–3:49 PM MST","n":18,"late_n":0,"share_pct":"0%","baseline_pct":"16%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 3 PM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":-6.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7719,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":7709,"event_id":3358,"slug":"3358-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures running late: 43% left 15+ min late in the last hour","body":"Of 23 departures that took off between 1:33 PM and 2:33 PM MST, 10 left at least 15 minutes late. Salt Lake City typically sees 23% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 2 PM hour). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-08T21:33:21.421818Z","time":"2:33 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 2:33 PM MST","utc_text":"2026-11-08 21:33 UTC"},"source_event":{"utc":"2026-11-08T21:33:00Z","time":"2:33 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 2:33 PM MST","utc_text":"2026-11-08 21:33 UTC"},"ingested":{"utc":"2026-11-08T21:33:20.249283Z","time":"2:33 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 2:33 PM MST","utc_text":"2026-11-08 21:33 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOFQyMTozMzoyMS40MjE4MTgrMDA6MDB8NzcwOQ","measurement":{"window":"1:33 PM–2:33 PM MST","n":23,"late_n":10,"share_pct":"43%","baseline_pct":"23%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 2 PM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":11.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7719,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[],"newer":{"id":7719,"kind":"Recovery","evidence":"observed","evidence_label":"Observed","severity_label":"Informational","headline":"Salt Lake City departures back near normal: 0% late in the last hour","published":{"utc":"2026-11-08T22:49:58.234358Z","time":"3:49 PM","zone":"MST","date":"Nov 8","ago":"4 days ago","full":"Sun Nov 8, 3:49 PM MST","utc_text":"2026-11-08 22:49 UTC"}}},{"id":7705,"event_id":3345,"slug":"3345-slc-delays","kind":"recovery","kind_label":"Recovery","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"info","severity_label":"Informational","severity_rank":1,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures back near normal: 12% late in the last hour","body":"Of 16 departures that took off between 1:18 PM and 2:18 PM MST, 2 left at least 15 minutes late. Salt Lake City typically sees 16% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 1 PM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 26% for 31 minutes across 16 checks, each with at least 12 flights and current data.","what_changed":"late share 47% at worst → 12% now","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-08T21:18:52.309529Z","time":"2:18 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 2:18 PM MST","utc_text":"2026-11-08 21:18 UTC"},"source_event":{"utc":"2026-11-08T21:18:00Z","time":"2:18 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 2:18 PM MST","utc_text":"2026-11-08 21:18 UTC"},"ingested":{"utc":"2026-11-08T21:18:51.249759Z","time":"2:18 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 2:18 PM MST","utc_text":"2026-11-08 21:18 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOFQyMToxODo1Mi4zMDk1MjkrMDA6MDB8NzcwNQ","measurement":{"window":"1:18 PM–2:18 PM MST","n":16,"late_n":2,"share_pct":"12%","baseline_pct":"16%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 1 PM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":6.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7705,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[]},{"id":7686,"event_id":3345,"slug":"3345-slc-delays","kind":"initial","kind_label":"Initial","evidence":"observed","evidence_label":"Observed","evidence_help":"Tailodds measured a change in actual operations.","severity":"significant","severity_label":"Significant","severity_rank":2,"event_type":"delay","type_label":"Delay","headline":"Salt Lake City departures running late: 47% left 15+ min late in the last hour","body":"Of 19 departures that took off between 11:45 AM and 12:45 PM MST, 9 left at least 15 minutes late. Salt Lake City typically sees 18% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 12 PM hour). Measured by Tailodds from FAA flight data against airline schedules.","what_changed":null,"airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-08T19:45:36.422806Z","time":"12:45 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 12:45 PM MST","utc_text":"2026-11-08 19:45 UTC"},"source_event":{"utc":"2026-11-08T19:45:00Z","time":"12:45 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 12:45 PM MST","utc_text":"2026-11-08 19:45 UTC"},"ingested":{"utc":"2026-11-08T19:45:34.947654Z","time":"12:45 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 12:45 PM MST","utc_text":"2026-11-08 19:45 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"observed_ops observed-ops-v1","config_version":"2026-10-17.1","model_version":null,"corrects_update_id":null,"cursor":"MjAyNi0xMS0wOFQxOTo0NTozNi40MjI4MDYrMDA6MDB8NzY4Ng","measurement":{"window":"11:45 AM–12:45 PM MST","n":19,"late_n":9,"share_pct":"47%","baseline_pct":"18%","baseline_basis":"US DOT on-time data, last 12 published months, departures in the 12 PM hour","method":"FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)","median_delay_min":9.0},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7705,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds measurement of FAA flight data against airline schedules","url":null,"role":"primary","source":"tailodds_observed"}],"corrections":[],"newer":{"id":7705,"kind":"Recovery","evidence":"observed","evidence_label":"Observed","severity_label":"Informational","headline":"Salt Lake City departures back near normal: 12% late in the last hour","published":{"utc":"2026-11-08T21:18:52.309529Z","time":"2:18 PM","zone":"MST","date":"Nov 8","ago":"5 days ago","full":"Sun Nov 8, 2:18 PM MST","utc_text":"2026-11-08 21:18 UTC"}}},{"id":7522,"event_id":3271,"slug":"3271-slc-delays","kind":"resolution","kind_label":"Resolution","evidence":"forecast","evidence_label":"Forecast","evidence_help":"Tailodds' model predicts it. 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This is a forecast, not a report of delays.","what_changed":"44% → 24%; calm-weather level 20%","airports":["SLC"],"metros":[],"direction":"departures","direction_label":"departures","published":{"utc":"2026-11-07T10:59:42.985356Z","time":"3:59 AM","zone":"MST","date":"Nov 7","ago":"6 days ago","full":"Sat Nov 7, 3:59 AM MST","utc_text":"2026-11-07 10:59 UTC"},"source_event":{"utc":"2026-11-07T10:00:00Z","time":"3:00 AM","zone":"MST","date":"Nov 7","ago":"6 days ago","full":"Sat Nov 7, 3:00 AM MST","utc_text":"2026-11-07 10:00 UTC"},"ingested":{"utc":"2026-11-07T10:59:36.897287Z","time":"3:59 AM","zone":"MST","date":"Nov 7","ago":"6 days ago","full":"Sat Nov 7, 3:59 AM MST","utc_text":"2026-11-07 10:59 UTC"},"historical":false,"simulated":false,"writer":"template-v1","detector":"forecast_blocks forecast-blocks-v1","config_version":"2026-10-17.1","model_version":"famB-sd-v4i","corrects_update_id":null,"cursor":"MjAyNi0xMS0wN1QxMDo1OTo0Mi45ODUzNTYrMDA6MDB8NzUyMg","forecast":{"p_pct":"24%","expected_cancellations":0.1,"target":"SLC departures noon–3 PM 2026-11-07 (15+ min late)","horizon_h":8.0,"model_version":"famB-sd-v4i","model_changed":false,"calibration":"isotonic (model/train_forecast.py)","n":41,"cycle":{"utc":"2026-11-07T10:00:00Z","time":"3:00 AM","zone":"MST","date":"Nov 7","ago":"6 days ago","full":"Sat Nov 7, 3:00 AM MST","utc_text":"2026-11-07 10:00 UTC"}},"lifecycle":"resolved","has_correction":false,"has_retraction":false,"update_count":2,"latest_update_id":7522,"status_label":"Resolved","n_match":1,"sources":[{"label":"Tailodds forecast","url":null,"role":"primary","source":"tailodds_forecast"}],"corrections":[]}],"next_cursor":"MjAyNi0xMS0wN1QxMDo1OTo0Mi45ODUzNTYrMDA6MDB8NzUyMg","top_cursor":"MjAyNi0xMS0xM1QyMDo1OTo1MS41MDI0ODMrMDA6MDB8OTE5OQ","flight_routes":null,"html":["\n\n\n\n\n\n\n
\n
\n \n \n \n CConfirmed\n Major\n \n A+D\n GND STOP\n NEW\n \n

FAA advisory: “NATIONAL GROUND STOP”

\n \n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n CConfirmed\n Significant\n \n A+D\n RESTRICT\n NEW\n \n

FAA advisory: “ALL AIRPORTS DIVERSION RECOVERY ACTIVATED”

\n \n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n ARR\n DELAY\n NEW\n \n

Salt Lake City arrivals running late: 46% reached the gate 15+ min late in the last hour

\n 46% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model lowers Salt Lake City departure delay risk noon–3 PM Friday to 28%, near normal

\n 48% → 28%; calm-weather level 18%\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model forecasts 48% delay risk for Salt Lake City departures noon–3 PM Friday

\n 48% risk\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n ARR\n DELAY\n RESOLVED\n \n

Salt Lake City arrivals running late: 53% reached the gate 15+ min late in the last hour

\n 53% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n ARR\n DELAY\n RESOLVED\n \n

Salt Lake City arrivals back near normal: 17% late in the last hour

\n late share 60% at worst → 17% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n ARR\n DELAY\n RESOLVED\n \n

Salt Lake City arrivals running late: 56% reached the gate 15+ min late in the last hour

\n 56% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures back near normal: 9% late in the last hour

\n late share 58% at worst → 9% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures running late: 54% left 15+ min late in the last hour

\n 54% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model lowers Salt Lake City departure delay risk noon–3 PM Tuesday to 19%, near normal

\n 41% → 19%; calm-weather level 13%\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model forecasts 41% delay risk for Salt Lake City departures noon–3 PM Tuesday

\n 41% risk\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n ARR\n DELAY\n RESOLVED\n \n

Salt Lake City arrivals back near normal: 0% late in the last hour

\n late share 54% at worst → 0% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n ARR\n DELAY\n RESOLVED\n \n

Salt Lake City arrivals running late: 54% reached the gate 15+ min late in the last hour

\n 54% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures back near normal: 7% late in the last hour

\n late share 50% at worst → 7% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures running late: 50% left 15+ min late in the last hour

\n 50% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model lowers Salt Lake City departure delay risk noon–3 PM Monday to 24%, near normal

\n 49% → 24%; calm-weather level 17%\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model forecasts 49% delay risk for Salt Lake City departures noon–3 PM Monday

\n 49% risk\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures back near normal: 14% late in the last hour

\n late share 58% at worst → 14% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures running late: 58% left 15+ min late in the last hour

\n 58% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures back near normal: 0% late in the last hour

\n late share 56% at worst → 0% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures running late: 43% left 15+ min late in the last hour

\n 43% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures back near normal: 12% late in the last hour

\n late share 47% at worst → 12% now\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n OObserved\n Significant\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Salt Lake City departures running late: 47% left 15+ min late in the last hour

\n 47% late\n
\n \n
","\n\n\n\n\n\n\n
\n
\n \n \n \n FForecast\n Informational\n SLC\n DEP\n DELAY\n RESOLVED\n \n

Model lowers Salt Lake City departure delay risk noon–3 PM Saturday to 24%, near normal

\n 44% → 24%; calm-weather level 20%\n
\n \n
"],"filters":"airport=SLC&mode=all&view=terminal"}