tailodds FORECAST
Partly stale · checked FAA NAS status 221 h staleForecast cycle 1 hLightning 221 h staleWeather observations no data staleFAA surface data 5 minFAA flight data 5 min

FAA NAS status is stale (221 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.

Forecast Significant Developing Delay BOS departures

Updated model puts Boston departure delay risk 3–6 PM Friday at 38%

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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 Forecast

    Model forecasts 50% delay risk for Boston departures 3–6 PM Friday

    Tailodds’ model gives the 93 departures scheduled from Boston 3–6 PM Friday an average 50% chance of leaving 15+ minutes late. With calm weather the same flights would average 24%. From the 4:00 PM EST forecast (model famA-fc-v3). This is a forecast, not a report of delays.

    Evidence for this update
    TargetBOS departures 3–6 PM 2026-11-13 (15+ min late)
    Probability (calibrated, mean per flight)50% over 93 flights
    Forecast cycle · horizonThu Nov 12, 4:00 PM EST · 22.0 h ahead
    Model versionfamA-fc-v3
    Source event time
    Ingested
    Published here (2026-11-12 21:58 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
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  2. De-escalation Forecast

    Updated model puts Boston departure delay risk 3–6 PM Friday at 38%

    What changed: 50% → 38% since the 4:00 PM EST forecast (model changed)

    Tailodds’ model gives the 96 departures scheduled from Boston 3–6 PM Friday an average 38% chance of leaving 15+ minutes late. With calm weather the same flights would average 26%. From the 2:00 AM EST forecast (model famA-fc-v3+famB-sd-v4i). The model changed since the previous item (from famA-fc-v3), 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.

    Evidence for this update
    TargetBOS departures 3–6 PM 2026-11-13 (15+ min late)
    Probability (calibrated, mean per flight)38% over 96 flights
    Forecast cycle · horizonFri Nov 13, 2:00 AM EST · 11.5 h ahead
    Model versionfamA-fc-v3+famB-sd-v4i (changed since the previous update)
    Source event time
    Ingested
    Published here (2026-11-13 08:27 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
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