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Forecast Major Resolved Delay MDW departures

Model raises Midway departure delay risk 9 PM–midnight Monday to 63%

Current state
Resolved: closed without a new report (The forecast window has started; measured delays are reported separately as observed items.)
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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 54% delay risk for Midway departures 9 PM–midnight Monday

    Tailodds’ model gives the 33 departures scheduled from Midway 9 PM–midnight Monday an average 54% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 2:00 PM CDT forecast (model famB-sd-v4i). This is a forecast, not a report of delays.

    Evidence for this update
    TargetMDW departures 9 PM–midnight 2026-10-19 (15+ min late)
    Probability (calibrated, mean per flight)54% over 33 flights
    Forecast cycle · horizonMon Oct 19, 2:00 PM CDT · 5.5 h ahead
    Model versionfamB-sd-v4i
    Source event time
    Ingested
    Published here (2026-10-19 20:27 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
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  2. Escalation Forecast

    Model raises Midway departure delay risk 9 PM–midnight Monday to 61%

    What changed: 54% → 61% since the 2:00 PM CDT forecast (same model, same window)

    Tailodds’ model gives the 33 departures scheduled from Midway 9 PM–midnight Monday an average 61% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 4:00 PM CDT forecast (model famB-sd-v4i). This is a forecast, not a report of delays.

    Evidence for this update
    TargetMDW departures 9 PM–midnight 2026-10-19 (15+ min late)
    Probability (calibrated, mean per flight)61% over 33 flights
    Forecast cycle · horizonMon Oct 19, 4:00 PM CDT · 4.0 h ahead
    Model versionfamB-sd-v4i
    Source event time
    Ingested
    Published here (2026-10-19 21:57 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
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  3. De-escalation Forecast

    Model lowers Midway departure delay risk 9 PM–midnight Monday to 54%

    What changed: 61% → 54% since the 4:00 PM CDT forecast (same model, same window)

    Tailodds’ model gives the 33 departures scheduled from Midway 9 PM–midnight Monday an average 54% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 6:00 PM CDT forecast (model famB-sd-v4i). This is a forecast, not a report of delays.

    Evidence for this update
    TargetMDW departures 9 PM–midnight 2026-10-19 (15+ min late)
    Probability (calibrated, mean per flight)54% over 33 flights
    Forecast cycle · horizonMon Oct 19, 6:00 PM CDT · 2.1 h ahead
    Model versionfamB-sd-v4i
    Source event time
    Ingested
    Published here (2026-10-19 23:56 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
    Was this useful?
  4. Escalation Forecast

    Model raises Midway departure delay risk 9 PM–midnight Monday to 63%

    What changed: 54% → 63% since the 6:00 PM CDT forecast (same model, same window)

    Tailodds’ model gives the 33 departures scheduled from Midway 9 PM–midnight Monday an average 63% chance of leaving 15+ minutes late. With calm weather the same flights would average 30%. From the 7:00 PM CDT forecast (model famB-sd-v4i). This is a forecast, not a report of delays.

    Evidence for this update
    TargetMDW departures 9 PM–midnight 2026-10-19 (15+ min late)
    Probability (calibrated, mean per flight)63% over 33 flights
    Forecast cycle · horizonMon Oct 19, 7:00 PM CDT · 0.6 h ahead
    Model versionfamB-sd-v4i
    Source event time
    Ingested
    Published here (2026-10-20 01:26 UTC)
    SourcesTailodds forecast
    Provenanceforecast_blocks forecast-blocks-v1 · config 2026-10-17.1 · writer template-v1
    Was this useful?

Closed Mon Oct 19, 9:01 PM CDT: The forecast window has started; measured delays are reported separately as observed items.