July 9, 2026

LaGuardia, JFK, Newark, and Dulles hit ground stops this afternoon, the first time this week the forecast wall went live

Three days of forecasts that fizzled, and this afternoon the thunderstorms finally built to terminal strength: ground stops ran at LaGuardia, JFK, Newark, and Dulles, Philadelphia's ground delay program pushed past two hours, and by 3 PM ET the stops had wound down but residual delays and a 4-5 PM second wave remain. No airline waivers yet. Boston's World Cup quarterfinal kicks off at 4 PM on top of Logan weather route swaps.

For three straight days the FAA forecast an afternoon wall of ground stops across the Northeast, and for three straight days it fizzled. The storms were real, but the system absorbed them with en route reroutes and route swaps, and not a single terminal ground stop fired. This afternoon, that streak broke.

As of 2 PM ET, the FAA's airspace feed showed ground stops in effect at LaGuardia, JFK, Newark, and Dulles, all due to thunderstorms. LaGuardia's stop was set to end at 2 PM ET, Newark's at 2:30 PM, and JFK and Dulles at 3 PM. Behind the stops, ground delay programs were running hard: Philadelphia was averaging over two hours (2 hours 3 minutes), JFK nearly two hours (1 hour 57 minutes), LaGuardia 1 hour 48 minutes, and Newark 1 hour 50 minutes. Baltimore departure delays stretched past two hours. Reagan National had a 33-minute ground delay program, and Teterboro had thunderstorm departure delays. By 3:20 PM ET, the FAA's live status board showed the ground stops had ended and no active en route events remained, but the delay programs and departure backlogs were still working through the system.

FlightAware counted 569 cancelled US flights and roughly 1,300 US delays so far today, a rolling total that includes the overnight tail.

Why it fired today and not the three days before

The difference is not that the storms were bigger. It is that they finally hit the departure gates with enough intensity to force the FAA to hold planes on the ground instead of routing around them. Monday through Wednesday morning, the FAA's en route tools (Cleveland Center reroutes, Flow Constrained Areas, Severe Weather Avoidance Plan routes, escape routes) absorbed the convection before it reached terminal strength. This afternoon the thunderstorms built directly into the New York and DC departure corridors after 1 PM ET, and rerouting alone was not enough.

The FAA's morning advisory, issued after the 11:15 AM ET planning webinar, had actually called this window correctly. It pushed LaGuardia and JFK to a 1 PM ET start, earlier than the old 2 PM forecast, and the ground stops fired roughly on that timeline. Newark and Dulles fired earlier than the plan anticipated: the advisory had Newark at 3 PM and Dulles at 4 PM, but both went live by early afternoon.

One thing that did not compound the weather: controller staffing. The FAA's advisory lists zero staffing triggers today, a sharp contrast to July 7, when New York TRACON and other facilities were short controllers and that made the delays worse.

What is still ahead: a 4-5 PM second wave

The ground stops have ended, but the FAA's operations plan still forecasts a late-afternoon window. At 4 PM ET, ground stops or delay programs are possible at Dulles, Reagan National, Baltimore, Atlanta, and Denver. At 5 PM ET, Charlotte and Chicago O'Hare and Midway enter the window. En route, the plan calls for Chicago route swaps after 4 PM and oceanic route closures overnight.

Whether that second wave verifies is the open question. The evening hours on July 7 and July 8 saw the convective activity fade without a second firing. But today is the first day the afternoon wall actually went live, which makes the late-afternoon window more credible than the same forecast was on the two days it fizzled.

Boston: World Cup quarterfinal meets the 4 PM weather window

France plays Morocco in the World Cup quarterfinal at 4 PM ET at Gillette Stadium outside Boston, the final World Cup match at the venue. Logan Airport is handling peak fan travel on top of the weather. The FAA's plan lists Boston route swaps, CDRs, and escape routes as possible after 2 PM ET, and if the 4 PM weather window fires, Boston flyers get squeezed from both sides: storm route swaps and World Cup departure volume. Boston inbound flights were already showing long delays earlier in the day from low clouds.

Rebooking: no waiver yet, check your carrier

No US airline has issued a new travel waiver for today's storms. The holiday-weekend waivers from Delta, American, and JetBlue all expired July 7 through July 8. Airlines typically post new waivers after a storm event verifies and the cancellation count climbs, so one may appear this evening. Until then, check your carrier's travel-alerts page directly rather than assuming an old waiver still applies.

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