New York's ground stops were extended to 11 PM as the storm wall stalled a third time, with Newark still in a 4-hour delay program and Wednesday at risk again

The midnight update: the FAA pushed the New York airport ground stops from 7 PM to 11 PM because the thunderstorm system is barely moving, with N90 impacts now projected to 2 AM and the scope expanded to second-tier airports including Florida and Canada, Newark's ground delay program is still running at nearly 4 hours average through 1 AM, Philadelphia and Boston have delay programs through 3 AM and 2 AM, Delta extended its waiver to cover Wednesday, and the FAA's Wednesday forecast puts the Northeast back at risk from 8 AM with SFO and Denver at PROBABLE.

What changed since the 6 PM update

The 6 PM issue reported that the New York airport ground stops had been extended two hours, to roughly 7 PM Eastern. They did not end there. The FAA's latest operations plan (ADVZY 030, signed 9:44 PM Eastern) shows the ground stops at JFK, LaGuardia, Newark, Teterboro, Morristown, and Caldwell were pushed to 11 PM, and Philadelphia's ground stop to 10:30 PM. The advisory attributes the extension to "the very slow moving weather system in the region" and says N90 impacts are now anticipated to extend to 2 AM, up from the midnight window the 6 PM issue projected.

The scope also widened. The FAA says the JFK and LaGuardia ground stops were "extended and expanded back to 2nd tier with ZMA and Canada included," meaning departure airports across Florida and Canadian airspace were added to the hold list. The advisory warns of a "high likelihood of ground stop/GDP extensions for the better part of the evening" and says ground stops are being evaluated for scope expansion to "all scope to avoid further diversions at airline request." Airlines, facing diverted aircraft and crews out of position, are asking the FAA to widen the holds rather than keep accepting flights that cannot land.

FlightQueue (updated 12:11 AM Eastern) still lists Newark at 8.6% cancellation rate with a "Major disruption" tag and an active ground delay program, while JFK has dropped to 2.1% (Elevated) and LaGuardia to 1.9% (Normal). The recovery at JFK and LaGuardia reflects the cancellations doing the demand-cutting work: with hundreds of flights already scrubbed, the remaining inbound flow is small enough that the airports can handle it without a ground stop. Newark, the worst-affected airport all day, has not caught the same break.

Three delay programs still running past midnight

The ground stops have ended, but three ground delay programs continue metering arrivals into the early morning hours. The average delays below are from the 6 PM update; the end times are from the FAA's current operations plan:

Newark (EWR): GDP until 12:59 AM Eastern, averaging 3 hours 50 minutes per flight. This has been the hardest airport all day, with NY1 reporting 255 Newark cancellations and 371 delays as of 4:30 PM.
Philadelphia (PHL): GDP until 2:59 AM Eastern, averaging 2 hours 33 minutes.
Boston (BOS): GDP until 1:59 AM Eastern, averaging 1 hour 51 minutes.

The staffing triggers that compounded the weather all evening, ZNY TMU and D10 TRACON until 11 PM and ZDC Area 6 and F11 TRACON until midnight, have expired. The FAA operations plan notes that escape routes, SWAP statements, and diversion recovery remain active through midnight Eastern for the Northeast, with the ZDC SWAP statement running to 1 AM.

US cancellations topped 2,000 on Tuesday, per FlightAware, with the three New York airports accounting for over 1,000 of those (LaGuardia 456, JFK 338, Newark 255, per NY1's 4:30 PM update). The Flood Watch for the New York tri-state remains in effect through Wednesday evening, with 2 to 5 inches of rain possible and rates of 2 to 3 inches per hour.

Wednesday brings another round

The FAA's operations plan includes tomorrow's forecast, and it is another multi-hub severe weather day. A Northeast regional planning telcon is scheduled for 6:30 AM Eastern, followed by the next planning webinar at 7:15 AM.

The SPC Day 1 outlook (valid through 8 AM Wednesday) carries a Slight Risk across the Mid-Atlantic, Carolinas, and southern Appalachians, with severe wind gusts and an isolated tornado threat. A separate severe risk covers the central High Plains, including eastern Colorado, which is relevant for Denver.

For Wednesday daytime, the FAA's terminal plan:

Northeast (BOS, LGA, JFK, EWR, TEB): ground stop or delay program POSSIBLE after 8 AM Eastern.
San Francisco (SFO): ground stop or delay program PROBABLE after 11 AM (low ceilings, the chronic fog factor).
Washington Reagan (DCA): ground stop or delay program POSSIBLE after noon.
Atlanta (ATL): ground stop POSSIBLE after 2 PM.
Denver (DEN): ground stop or delay program PROBABLE after 3 PM.
Orlando and Tampa (MCO, TPA): ground stop POSSIBLE after 11 AM.

CDRS, SWAP, and escape routes are PROBABLE for Boston, the New York metro, Philadelphia, and Potomac starting at 7 AM. The two PROBABLE tier items, SFO and Denver, are the highest-confidence forecasts in the plan. POSSIBLE tier is the FAA's lowest confidence level and these forecasts can fizzle, as they have on many afternoons this month. But after three consecutive days of verified Northeast disruption, the pattern is holding.

Waivers: Delta extends to Wednesday

Delta has extended its New York City waiver to cover July 27 through July 29 (EWR, HPN, JFK, LGA), with rebooking through August 1 and tickets issued by July 28. A separate Mid-Atlantic waiver covers July 28 through July 29 for Allentown, Boston, Baltimore, Reagan, Dulles, and Philadelphia, also rebooking through August 1.

JetBlue covers July 27 through July 29 for Islip, JFK, LaGuardia, Newark, and Westchester, with rebooking through August 1 and original tickets booked before July 26.

American and United had waivers open for Tuesday travel. Check their travel alert pages directly for whether coverage has been extended to Wednesday, as both pages were unavailable to verify overnight:

If your flight is canceled, you are entitled to a cash refund under DOT rules, not just a voucher. Rebook through the airline app first, before the gate agent line forms.