Thunderstorms rolling across western Washington on Thursday morning, July 16, 2026, forced federal officials to hit pause on inbound flights to Seattle-Tacoma International Airport, tangling schedules during one of the busiest summer travel stretches. The Federal Aviation Administration ordered a halt to certain incoming traffic, which quickly backed up departures as controllers worked to steer planes around the storm cells. Inside the terminal, travelers reported shuffling gate assignments and longer lines while airlines scrambled to juggle crews and aircraft. Airport and airline officials urged anyone heading to Sea-Tac to confirm their flight status before leaving home.
FAA halts inbound traffic from several centers and Canadian airports
The Federal Aviation Administration put the ground stop in place at about 9:45 a.m. PDT, restricting departures bound for Sea-Tac from three regional air traffic control centers and five Canadian airports. The move affected flights leaving Salt Lake Center (ZLC), Oakland Center (ZOA) and Seattle Center (ZSE), along with departures from Edmonton, Vancouver, Calgary, Victoria and Kelowna. The goal was to space out inbound traffic while thunderstorms fired along the approach paths into the airport. The FAA estimated there was a 30% to 60% chance the restriction could be extended as weather evolved. As reported by FOX 13 Seattle, the pause was expected to last at least into mid-morning.
FAA status board shows weather-related delays
On the FAA’s airport status dashboard, Sea-Tac’s ground stop carried a scheduled end time of 11:15 a.m. PDT and a warning about “reroutes/mitigation restrictions” tied to thunderstorms. Minimum departure delays were running close to 46 minutes, with some flights pushed to around an hour. Weather data linked through NOAA was updating in real time on the same page as controllers tracked the storms moving across the region. Air traffic managers said they were ready to tweak arrival metering to work through the backlog once the worst of the weather cleared. According to the Federal Aviation Administration, officials planned to reassess conditions throughout the morning.
What this means for travelers
Departures out of Sea-Tac were already feeling the squeeze, with average delays hovering around 30 minutes and trending upward as airlines repositioned aircraft and crews. The airport was handling about 42 arrivals per hour, with incoming flights using runways 16R and 16L and departures launching from 16C and 16L, as reported by FOX 13 Seattle. Travelers with tickets in the next few hours were advised to expect a shifting schedule and to keep a close eye on airline alerts while controllers thread traffic around the active storm cells. Airport officials cautioned that the ground stop could be extended or additional reroutes put in place if thunderstorms hang around longer than expected.
