Know before you reach the gate
When the FAA holds flights for a hub, or storms build over it, a traveller connecting there wants to know before reaching the gate.
On days like these
Of 456 past hub-days with 3 or more hours of thunderstorms in the 6 am forecast and a Slight-or-higher outlook, 213 lost 5% or more of departures to cancellation, against about 6% of all hub-days.
31 hubs, Jan 2023 – Jul 2025. Heads-ups are our estimate from public NWS forecasts.
How Hub alerts on X works
FAA alerts
@WingmarkData posts the FAA’s own listings for 31 large US hubs within minutes: ground stops, ground delay programmes, delays of 30 minutes or more and outright airport closures (up to 30 alerts a day), and a follow-up when the FAA no longer lists them.
Thunderstorm heads-up
On mornings when the National Weather Service forecasts 3 or more hours of possible thunderstorms at a hub and the Storm Prediction Center outlook is Slight or higher, a heads-up posts before the storms arrive.
Every figure names its source and dates; if we can’t source it, we leave it out.
Grades are checked on weeks the model never saw.
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Other Wingmark products
All products →US connections between 99 airports, graded A to F, from a year of flight records.
Try GateCast →Score API and AI connectorThe same grades inside your product or assistant.
See the API →Ask about your flightAsk @WingmarkData about a flight’s on-time record.
Ask on X →US Hub Airport Power RankingsA monthly table of 31 large US hubs from the flight record.
See the table →The Wingmark newsroomData stories and a monthly edition, free to read.
Read the latest →Data for businessOur published figures, reports and grades, licensed for your own use.
Talk to us →Relayed from the FAA’s public status; heads-ups are our estimate from public NWS forecasts; unofficial; independent of the FAA and NWS. They don’t predict any single flight.