Partly stale · checked FAA NAS status 222 h staleForecast cycle 62 minLightning 221 h staleWeather observations no data staleFAA surface data 7 minFAA flight data 8 min

FAA NAS status is stale (222 h old). No FAA restriction can start or end on the wire until it is fresh again.

Lightning is stale (221 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.

Observed Major Developing Delay BOS arrivals

Boston arrival delays worsen: 74% late in the last hour

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Developing
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Tailodds reports what the FAA publishes, what we measure and what our model forecasts. It doesn’t control airport operations or change bookings; check with your airline about your trip.

Updates oldest first

  1. Initial Observed

    Boston arrivals running late: 60% reached the gate 15+ min late in the last hour

    Of 25 arrivals that landed between 1:36 PM and 2:36 PM EST, 15 reached the gate at least 15 minutes late. Typically 26% of arrivals at Boston arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window1:36 PM–2:36 PM EST
    Sample25 flights, 15 late (60%)
    Comparison26% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay17.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-12 19:36 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  2. Escalation Observed

    Boston arrival delays worsen: 64% late in the last hour

    What changed: late share 60% → 64%

    Of 28 arrivals that landed between 2:03 PM and 3:03 PM EST, 18 reached the gate at least 15 minutes late. Typically 26% of arrivals at Boston arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window2:03 PM–3:03 PM EST
    Sample28 flights, 18 late (64%)
    Comparison26% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay26.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-12 20:03 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  3. De-escalation Observed

    Boston arrival delays ease: 55% late in the last hour, still above normal

    What changed: late share 64% → 55%

    Of 20 arrivals that landed between 10:57 PM and 11:57 PM EST, 11 reached the gate at least 15 minutes late. Typically 26% of arrivals at Boston arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window10:57 PM–11:57 PM EST
    Sample20 flights, 11 late (55%)
    Comparison26% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay40.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 04:58 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  4. Escalation Observed

    Boston arrival delays worsen: 74% late in the last hour

    What changed: late share 55% → 74%

    Of 31 arrivals that landed between 11:32 PM and 12:32 AM EST, 23 reached the gate at least 15 minutes late. Typically 26% of arrivals at Boston arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window11:32 PM–12:32 AM EST
    Sample31 flights, 23 late (74%)
    Comparison26% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay38.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 05:32 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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