Orlando's ground stop held 2,837 flights for over two hours this afternoon before lifting, with Dulles on VIP delays and more Florida stops on watch tonight

Orlando International went into a ground stop at 2:38 PM ET that the FAA cut to a single arrival route from the north while South Florida traffic couldn't reach it through thunderstorms, holding 2,837 flights for an 83-minute average and a 185-minute maximum before cancelling the stop 8 minutes early at 4:52 PM ET, a VIP movement is now delaying Dulles arrivals up to 30 minutes through 6:30 PM ET, San Francisco's chronic fog-and-construction ground delay program was purged alongside Orlando's stop, and the FAA's current plan keeps MCO/TPA, MIA/FLL, JFK/LGA, PHL/EWR, and Denver on watch for more stops through 7 to 9 PM ET as the Storm Prediction Center flags an Enhanced Risk of severe storms over Wisconsin and the Upper Midwest into tonight.

Orlando's 2-hour-plus ground stop is the first convective program to actually fire today

The FAA's Jacksonville center (ZJX) put Orlando International (MCO) into a ground stop at 2:38 PM ET, scheduled to run until 5:00 PM ET with medium odds of an extension. The stop was cancelled at 4:52 PM ET, eight minutes ahead of schedule. By then it had metered 2,837 flights bound for Orlando, with delays averaging 83 minutes and peaking at 185 minutes, just over three hours.

The cause was thunderstorms, not staffing. The FAA's own advisory ADVZY 093 records that only one arrival route from the north remained open, and that the Miami center (ZMA) "cannot get to MCO from South Florida due to thunderstorms." Departures bound for Orlando were held at their origin airports across six centers (ZTL, ZDC, ZHU, ZJX, ZMA, ZME) rather than allowed to pile up in airborne holding.

This is the first of today's watch-list windows to actually go live. Every Florida and Northeast hub the FAA had on its plan had stayed at the lowest POSSIBLE tier through the afternoon, until Orlando's thunderstorms built over the field. The earlier operations plan (ADVZY 091) had flagged MCO as "currently in a ground stop until 2000Z" with ZJX and ZMA "tactically moving flights around thunderstorms."

Orlando is one of Florida's busiest airports and the main gateway for Disney-bound summer travel, so a two-hour arrival freeze lands squarely on peak inbound family traffic. FlightAware counts only 9 delays and 0 cancellations logged at MCO itself, because a ground stop holds the delay at the departure airport, not the destination, so the real disruption is spread across the origin airports feeding Orlando.

As of 5:50 PM ET the stop is lifted and MCO is back to normal operations. The FAA's current operations plan (ADVZY 099) lists no active terminal programs, and the live NAS status and The Frequent Flier's FAA delay tracker both show Orlando operating normally.

A VIP movement is delaying Dulles arrivals right now, and San Francisco's program was purged

Separately from the weather, a VIP movement is holding up Dulles (IAD) arrivals by up to 30 minutes through 6:30 PM ET tonight (FAA ADVZY 095). VIP ground stops and arrival delays are a recurring summer pattern around Washington as heads of state and delegations move through the capital; this one is an arrival-delay advisory, not a full ground stop, and it ends in roughly 40 minutes.

The FAA also purged San Francisco's chronic low-clouds-and-construction ground delay program in its latest update (ADVZY 099), with a note that another SFO program is possible after 10 PM ET to manage late-evening demand. Miami (MIA) is carrying weather-related miles-in-trail spacing restrictions, about 15 minutes, but no ground stop.

The FAA keeps Florida and the Northeast on watch through tonight, with an Upper Midwest severe-risk angle

The FAA's current operations plan keeps the afternoon's watch list live into the evening, all at the lowest POSSIBLE tier:

MCO/TPA and MIA/FLL: ground stop possible until 7 PM ET
JFK/LGA and PHL/EWR/TEB: ground stop or delay program possible until 9 PM ET
Denver: ground stop or delay program possible until 9 PM ET
SFO: ground delay program possible after 10 PM ET

The plan lists several air-traffic-control staffing triggers, ZNY Area D, PHL Area C, ZBW Area D, and Albuquerque center's southwest and northwest areas, but none has produced a terminal ground stop; they are being managed with miles-in-trail spacing and reroutes. The NY Metro hotline is active in advance of forecast thunderstorm development, and the FAA has issued its PHLYER West route with additional escape routes possible.

A separate concern sits over the Upper Midwest. The Storm Prediction Center's Day 1 outlook carries an Enhanced Risk of severe thunderstorms across Wisconsin, far eastern Minnesota, and Upper Michigan, with large to very large hail, damaging winds to 75+ mph, and a tornado risk, mainly this afternoon and tonight. SPC expects storms to initiate over northern Minnesota into Wisconsin and grow into southeastward-moving wind clusters this evening. Minneapolis (MSP) and Chicago (ORD/MDW) sit on the southern edge of the risk and were operating normally at 5:50 PM ET, but if those Wisconsin clusters drive southeast toward the Chicago terminals, ground stops there become the next thing to watch.

Rebooking: no airline waiver yet

No carrier had issued a waiver tied to today's Orlando or Florida thunderstorms as of 5:50 PM ET. The earlier holiday-weekend and East Coast storm waivers all expired by mid-July. If you are flying to or from Orlando tonight, check your airline's travel-alerts page directly, American at aa.com, Delta at delta.com, United at united.com, and JetBlue at jetblue.com, and rebook through the airline's own channels if a waiver appears. FlightAware's national tracker was showing roughly 250 U.S. cancellations and about 8,200 U.S. delays for the day, with cancellations running below the daily average.