Sourced developments at US airports: what the FAA reports at every airport, and what we measure and our model forecasts at the busiest ones.
Partly stale · checked FAA NAS status 223 hstaleForecast cycle 1 hLightning 223 hstaleWeather observations no datastaleFAA surface data 6 minFAA flight data 6 min
FAA NAS status is stale (223 h old).
No FAA restriction can start or end on the wire until it is fresh again.
Lightning is stale (223 h old).
Lightning items are paused; thunderstorm items still come from official observations.
Weather observations is stale.
Weather items are paused until it is fresh again; missing observations never end a weather event.
Tailodds’ model gives the 40 departures scheduled from Sacramento noon–3 PM Friday an average 43% chance of leaving 15+ minutes late. With calm weather the same flights would average 26%. From the 11:00 PM PST forecast (model famA-fc-v3+famB-sd-v4i). This is a forecast, not a report of delays.
Probability 43%Horizon 11.5 hModel famA-fc-v3+famB-sd-v4i
Tailodds’ model gives the 25 departures scheduled from Sacramento 6–9 PM Friday an average 50% chance of leaving 15+ minutes late. With calm weather the same flights would average 32%. From the 7:00 PM PST forecast (model famA-fc-v3). This is a forecast, not a report of delays.
Tailodds’ model gives the 25 departures scheduled from Sacramento 3–6 PM Friday an average 48% chance of leaving 15+ minutes late. With calm weather the same flights would average 31%. From the 4:00 PM PST forecast (model famA-fc-v3). This is a forecast, not a report of delays.
Of 14 arrivals that landed between 11:00 PM and 12:00 AM PST, 6 reached the gate at least 15 minutes late. Typically 19% of arrivals at Sacramento arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.
Window 11:00 PM–12:00 AM PSTSample 14 flightsLate 43%Typical 19%
Source: Tailodds measurement of FAA flight data against airline schedulesTimeline (1)View SMF
Of 14 arrivals that landed between 8:06 PM and 9:06 PM PST, 6 reached the gate at least 15 minutes late. Typically 19% of arrivals at Sacramento arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.
Tailodds’ model gives the 22 departures scheduled from Sacramento 9 PM–midnight Friday an average 62% chance of leaving 15+ minutes late. With calm weather the same flights would average 41%. From the 4:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Tailodds’ model gives the 44 departures scheduled from Sacramento 6–9 PM Friday an average 55% chance of leaving 15+ minutes late. With calm weather the same flights would average 40%. From the 2:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Tailodds’ model gives the 46 departures scheduled from Sacramento 3–6 PM Friday an average 57% chance of leaving 15+ minutes late. With calm weather the same flights would average 39%. From the 1:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Tailodds’ model gives the 22 departures scheduled from Sacramento 9 PM–midnight Thursday an average 68% chance of leaving 15+ minutes late. With calm weather the same flights would average 38%. From the 8:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Of 12 departures that took off between 12:56 PM and 1:56 PM PST, 6 left at least 15 minutes late. Sacramento typically sees 24% 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.
Tailodds’ model gives the 46 departures scheduled from Sacramento noon–3 PM Tuesday an average 32% chance of leaving 15+ minutes late. With calm weather the same flights would average 25%. From the 10:00 AM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Of 13 arrivals that landed between 9:43 PM and 10:43 PM PST, 7 reached the gate at least 15 minutes late. Typically 19% of arrivals at Sacramento 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: 58% → 52% since the 6:00 PM PST forecast (same model, same window)
Tailodds’ model gives the 22 departures scheduled from Sacramento 9 PM–midnight Monday an average 52% chance of leaving 15+ minutes late. With calm weather the same flights would average 28%. From the 7:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Tailodds’ model gives the 44 departures scheduled from Sacramento 3–6 PM Monday an average 46% chance of leaving 15+ minutes late. With calm weather the same flights would average 29%. From the 10:00 AM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Of 13 departures that took off between 9:35 AM and 10:35 AM PST, 7 left at least 15 minutes late. Sacramento typically sees 15% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 10 AM hour). Measured by Tailodds from FAA flight data against airline schedules.
Window 9:35 AM–10:35 AM PSTSample 13 flightsLate 54%Typical 15%
Source: Tailodds measurement of FAA flight data against airline schedulesTimeline (1)View SMF
Tailodds’ model gives the 61 departures scheduled from Sacramento noon–3 PM Monday an average 42% chance of leaving 15+ minutes late. With calm weather the same flights would average 26%. From the 9:00 AM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Tailodds’ model gives the 61 departures scheduled from Sacramento noon–3 PM Monday an average 32% chance of leaving 15+ minutes late. With calm weather the same flights would average 26%. From the 4:00 AM PST forecast (model famB-sd-v4i). The model changed since the previous item (from famA-fc-v3+famB-sd-v4i), so some or all of this change comes from the new model rather than new information. This is a forecast, not a report of delays.
Probability 32%Horizon 6.0 hModel famB-sd-v4iModel changed
Of 15 arrivals that landed between 9:42 PM and 10:42 PM PST, 7 reached the gate at least 15 minutes late. Typically 19% of arrivals at Sacramento arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.
Tailodds’ model gives the 46 departures scheduled from Sacramento 6–9 PM Sunday an average 64% chance of leaving 15+ minutes late. With calm weather the same flights would average 43%. From the 4:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Of 12 departures that took off between 2:22 PM and 3:22 PM PST, 8 left at least 15 minutes late. Sacramento typically sees 26% 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.
Tailodds’ model gives the 38 departures scheduled from Sacramento 3–6 PM Sunday an average 56% chance of leaving 15+ minutes late. With calm weather the same flights would average 40%. From the 1:00 PM PST forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Tailodds’ model gives the 23 departures scheduled from Sacramento 3–6 PM Saturday an average 46% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 2:00 PM PDT forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Of 15 arrivals that landed between 9:07 PM and 10:07 PM PDT, 6 reached the gate at least 15 minutes late. Typically 19% of arrivals at Sacramento arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.
Of 12 departures that took off between 6:36 PM and 7:36 PM PDT, 6 left at least 15 minutes late. Sacramento typically sees 27% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 7 PM hour). Measured by Tailodds from FAA flight data against airline schedules.
Tailodds’ model gives the 18 departures scheduled from Sacramento 9 PM–midnight Friday an average 48% chance of leaving 15+ minutes late. With calm weather the same flights would average 31%. From the 4:00 PM PDT forecast (model famB-sd-v4i). This is a forecast, not a report of delays.
Older items
Each item is the latest update matching your filters; the event’s current status is on its chip. All updates shows the full chronological wire.
Confirmed
An official source (the FAA) reports it. We attribute it; we don’t independently verify it.
Observed
We measured it from FAA flight data: window, sample size and the typical level are on the item.
Forecast
Our model predicts it, with its probability, target, horizon and model version. It has not happened. How accurate is it?