Ground stops, explained

A ground stop is the FAA's bluntest traffic-management tool: aircraft bound for the affected airport are held on the ground at their departure point until the stop is lifted. Nothing new launches toward the airport — traffic already airborne usually continues, holds, or diverts.

Why ground stops happen

• Weather — the big one: thunderstorms over the field or the arrival fixes, snow and deicing backlogs, or low ceilings cutting the arrival rate below demand.
• Volume — more arrivals scheduled than the airport can physically land per hour.
• Staffing or equipment — a TRACON/tower staffing trigger or an outage (radar, ILS).
• Events — a disabled aircraft on the runway, a security halt, a VIP movement.

How long do they last?

Ground stops are issued with a short program end time — often 30–90 minutes out — and then either lifted, extended, or converted into a ground delay program (a metered flow instead of a full halt). Treat the published end time as the FAA's current estimate, not a promise: a line of storms that stalls extends the stop with it.

What it means for you

Flying GA? A ground stop at a Bravo hub ripples outward — expect flow into satellite fields, full ramps, and clearance delays across the region. Riding the airlines?Your aircraft is probably sitting at its departure airport; the app's "delayed" usually resolves after the stop lifts, in waves. Either way, the weather driving most ground stops shows up in the airport's METAR first — thunderstorms, wind, ceilings — which is exactly what alerting on the weather catches.

⚠️ Informational only — FAA NAS Status is the authoritative source. Airline passengers: your carrier's updates govern your flight.