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Forecast Major Developing Delay BNA departures

Updated model puts Nashville departure delay risk 3–6 PM Sunday at 63%

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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.

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  1. Initial Forecast

    Model forecasts 49% delay risk for Nashville departures 3–6 PM Sunday

    Tailodds’ model gives the 67 departures scheduled from Nashville 3–6 PM Sunday an average 49% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 4:00 AM CST forecast (model famA-fc-v3+famB-sd-v4i). This is a forecast, not a report of delays.

    Evidence for this update
    TargetBNA departures 3–6 PM 2026-11-15 (15+ min late)
    Probability (calibrated, mean per flight)49% over 67 flights
    Forecast cycle · horizonSun Nov 15, 4:00 AM CST · 10.1 h ahead
    Model versionfamA-fc-v3+famB-sd-v4i
    Source event time
    Ingested
    Published here (2026-11-15 10:55 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
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  2. Escalation Forecast

    Updated model puts Nashville departure delay risk 3–6 PM Sunday at 63%

    What changed: 49% → 63% since the 4:00 AM CST forecast (model changed)

    Tailodds’ model gives the 67 departures scheduled from Nashville 3–6 PM Sunday an average 63% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 5:00 AM CST 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.

    Evidence for this update
    TargetBNA departures 3–6 PM 2026-11-15 (15+ min late)
    Probability (calibrated, mean per flight)63% over 67 flights
    Forecast cycle · horizonSun Nov 15, 5:00 AM CST · 9.1 h ahead
    Model versionfamB-sd-v4i (changed since the previous update)
    Source event time
    Ingested
    Published here (2026-11-15 11:56 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
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