Partly stale · checked FAA NAS status 225 h staleForecast cycle 2 hLightning 225 h staleWeather observations no data staleFAA surface data 6 minFAA flight data 5 min

FAA NAS status is stale (225 h old). No FAA restriction can start or end on the wire until it is fresh again.

Lightning is stale (225 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 Significant Resolved Delay MDW departures

Midway departures back near normal: 15% late in the last hour

Current state
Resolved at 10:17 PM CDT
Started
Latest activity
Updates
2
Create monitor View MDWFlights at MDW

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

    Midway departures running late: 73% left 15+ min late in the last hour

    Of 15 departures that took off between 7:06 PM and 8:06 PM CDT, 11 left at least 15 minutes late. Midway typically sees 41% 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.

    Evidence for this update
    Measurement window7:06 PM–8:06 PM CDT
    Sample15 flights, 11 late (73%)
    Comparison41% typical · US DOT on-time data, last 12 published months, departures in the 7 PM hour
    Median delay34.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-10-31 01:06 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. Recovery Observed

    Midway departures back near normal: 15% late in the last hour

    What changed: late share 77% at worst → 15% now

    Of 20 departures that took off between 9:17 PM and 10:17 PM CDT, 3 left at least 15 minutes late. Midway typically sees 51% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 9 PM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 30% for 31 minutes across 16 checks, each with at least 12 flights and current data.

    Evidence for this update
    Measurement window9:17 PM–10:17 PM CDT
    Sample20 flights, 3 late (15%)
    Comparison51% typical · US DOT on-time data, last 12 published months, departures in the 9 PM hour
    Median delay3.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-10-31 03:17 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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