Dolphin Weakened Before Okinawa and Every Friday Flight Was Cancelled Anyway: Why Airlines Decide on the Forecast, What Happens to Naha Now, and When the Backlog Clears
Typhoon Dolphin arrived at Okinawa smaller than it left the Ogasawara Islands. The flights were cancelled before anybody knew that.
Both of those facts are true, and the gap between them is the thing worth understanding if you fly in this region.
Here is what actually happened. On 4 August, Dolphin was northeast of Iwo To having completed its fourth eyewall replacement cycle, reintensified to the equivalent of a Category 4, around 215 km/h.
By Friday it was forecast to pass roughly 40 miles north of Kadena Air Base at about three in the afternoon, arriving as either a Category 1 equivalent or a weakened tropical storm, with sustained winds possibly reaching 90 mph.
That is a large downgrade in three days.
And in the meantime, Japan Airlines and All Nippon Airways had cancelled some Thursday flights to and from Naha, and then cancelled all Friday flights.
The storm got weaker. The cancellations did not get reversed. That is not a mistake, and this article is about why.
Why airlines decide on the forecast, not the outcome
Because they have to decide before the outcome exists.
An airline cancelling a Friday flight is making that call on Wednesday or Thursday. At that point the forecast has Dolphin arriving as a strong typhoon. The decision is made against that, because the alternative is finding out on Friday morning that you were wrong in the expensive direction.
The expensive direction is not "we cancelled and it turned out fine." It is "we operated and the aircraft is now stuck at a closed airport with a crew that is out of hours."
One aircraft in the wrong place breaks a chain of flights for the next two days. That is the cost being avoided, and it is much larger than the cost of a cancellation that turns out to have been unnecessary.
There is also a hard operational floor underneath the judgement. Aircraft have crosswind limits. Ground crews cannot work outside in sustained gale-force wind. Fuel trucks and baggage loaders get secured before a storm, not during one. Even with a weakened system, a wide wind field over an island airport stops ground operations regardless of what the category says.
And Naha is on an island. There is no diverting to the next city by road. If the weather closes in, whatever is on the ground stays on the ground.
So the sequence is: forecast on Wednesday, decision on Thursday, storm on Friday. By the time reality arrives, the schedule was set two days ago.
What this means for you, concretely: a storm weakening does not un-cancel your flight. Once a cancellation is issued and passengers are rebooked, the airline is not going to reverse it because the wind came in lower than expected. The aircraft and crew have already been moved.
What happens to Naha now
The airport reopens well before the schedule does.
The order is roughly: winds drop below operational limits, the airport inspects runways and navigation aids, ground equipment comes back out, and only then do aircraft start arriving. Each step takes hours.
Then the real constraint appears, which is that the aircraft are somewhere else. A carrier that cancelled two days of Naha flying has its fleet distributed across the network in positions that assume those flights did not happen. Getting back to a normal schedule is a repositioning problem, not a weather problem.
Crew duty limits are the harder half. A crew that was displaced needs legally mandated rest, and sometimes needs to be flown somewhere as a passenger first, which consumes seats that would otherwise go to stranded travellers.
Two to four days is the normal shape of this. Longer if the closure hit a peak travel period, and early August in Japan is a peak travel period.
The practical consequence is that a Saturday or Sunday flight out of Naha is not automatically safe just because the storm is gone by Friday night. Those flights are competing for capacity with everybody who was cancelled on Thursday and Friday.
If you are in that queue, the single thing that matters is when you asked. Rebooking requests are processed roughly in order, and the person who requested on Thursday sits ahead of the person who requested on Saturday.
Where the storm goes next
After the Ryukyus, Dolphin moves into the East China Sea and slows down.
Current guidance has pointed toward a second landfall in the vicinity of central Zhejiang province in China, several days out, though that part of the forecast has moved around considerably during the week and should be treated as less certain than the Okinawa timing was.
The thing to watch there is not the category. It is the wind field, which has been expanding as the intensity falls — a pattern we wrote about earlier this week and which has held.
For anyone booked into Shanghai, Hangzhou or the surrounding coast in the next several days, the useful action is the same one that applied to Okinawa on Wednesday: read your airline's advisory page, note the covered airports and dates, and do not cancel voluntarily before a waiver exists.
Where to check this yourself
Do not take a forecast from a blog, including this one. Use the agency responsible for where you are, and your airline for the booking.
Japan Meteorological Agency: https://www.jma.go.jp/en/typh/
Korea Meteorological Administration: https://www.kma.go.kr/eng/weather/typoon/typhoon_05.jsp
Joint Typhoon Warning Center: https://www.metoc.navy.mil/jtwc/jtwc.html
Hong Kong Observatory: https://www.hko.gov.hk/en/index.html
China National Meteorological Center: http://www.nmc.cn/publish/typhoon/typhoon.html
For flight status specifically, the airport's own operational page updates faster than airline schedules do, and JAL and ANA both publish domestic weather disruption pages.
The short version
Dolphin weakened substantially between Tuesday and Friday. It still passed close enough to Okinawa to stop the island's aviation for two days.
Airlines cancel on the forecast because the decision has to be made two days early, and because being wrong in the operating direction costs far more than being wrong in the cancelling direction.
A weaker storm does not restore a cancelled flight. The aircraft has already moved.
And the recovery is a logistics problem measured in days, not a weather problem measured in hours. If your flight is in the next few days out of Naha, act now rather than after the all clear.
The Friday in question, reconstructed from the published record
The argument above is that airlines decide on the forecast rather than on the weather. Dolphin's Okinawa approach is documented closely enough to put hours and counts against it, and the numbers are more one-sided than the argument suggests.
The decision timeline
| When | What was already true |
|---|---|
| 5 August | Dolphin had weakened to Category 1 equivalent, around 145 km/h |
| Thu 6 Aug, 7.00 a.m. | TCCOR 1 declared on Okinawa: sustained winds of at least 58 mph expected within twelve hours |
| Before the storm arrived | JAL and ANA had already cancelled both Thursday and Friday flights to and from Naha |
| Fri 7 Aug, around 3.00 p.m. | Closest approach, projected about 40 miles north of Kadena Air Base, as either a Category 1 equivalent or a weakened tropical storm |
| Fri 7 Aug | Naha closed for the whole day. More than 500 flights cancelled. All island bus companies and the Okinawa Urban Monorail suspended. |
Thursday's flights were cancelled for a storm whose closest approach was Friday afternoon. At the moment that call was made, Thursday was still flyable. That is roughly 32 hours between the island's highest routine readiness state and the storm actually arriving, and the airline decision sat ahead of even that.
How large 500 cancellations is
Naha Airport handled 158,822 aircraft movements and 21,705,234 passengers in 2024, which averages about 435 movements and 59,466 passengers a day.
| Measure | Value |
|---|---|
| Flights cancelled for Dolphin | 500+ |
| As a share of average daily movements | About 115% |
| Dolphin's intensity at closest approach | Category 1 equivalent, or a weakened tropical storm |
| Dolphin's intensity nine days earlier | Category 5 equivalent, 910 hPa |
So a storm that had already dropped from Category 5 to roughly Category 1, and that was forecast to pass 40 miles offshore, removed more than a full normal day of Naha's flying.
The precision point worth keeping
“It passed 40 miles north of Kadena” is true and is also how most coverage framed it. The fuller record is that Dolphin made direct landfall over Kume Island, which is in Okinawa Prefecture.
That matters because of how travellers reason. “It missed us” usually means “it missed the airport I was flying from”. A storm can miss Kadena by 40 miles, make landfall on another island in the same prefecture, and close the prefecture's only major airport for a full day. All three of those were true on 7 August.
Why the Friday cancellation was correct, and why Monday was too
The reflex is to read advance cancellations as airlines being over-cautious with other people's holidays. The arithmetic says otherwise. Once 500 flights go, the question stops being about weather and becomes about seats.
Against published load factors, ANA's domestic figure for fiscal 2024 was 75.0 per cent and JAL recorded 82.9 per cent in a quarter of fiscal 2025, Naha's daily spare capacity and the time to re-accommodate a day's worth of displaced passengers look like this.
| Load factor | Spare seats per day | Days to clear one day's displacement |
|---|---|---|
| 75% | About 19,800 | About 3.3 |
| 85%, a realistic August | About 10,500 | About 6.2 |
An airline that cancels Thursday as well as Friday is not adding a day of disruption. It is removing a day of passengers from a queue that was already going to take three to six days to clear. Fewer people in the backlog means everyone moves sooner. The cancellation that looks gratuitous from the check-in desk is the reason the queue is not longer.
What this gives you as a rule
| Decision | Do this | Because |
|---|---|---|
| What to watch | The forecast two days out, not the sky | Thursday was cancelled for a Friday storm |
| How to read “it is weakening” | Ignore it for flight purposes | Dolphin was down to Category 1 and still took 500+ flights |
| How to read “it will miss us” | Ask what closes anyway | 40 miles offshore, and Naha shut for a day |
| When to move your booking | While the waiver is open, before the cancellations | After them you are in a 3 to 6 day queue |
| Which direction to move it | Earlier, not later | Pre-storm flights still have their normal spare seats |
Sources for this section
- Stars and Stripes, Okinawa bases brace for lengthy lockdown, flooding from Typhoon Dolphin, 6 August 2026 (TCCOR 1 at 7 a.m. Thursday, projected passage 40 miles north of Kadena around 3 p.m. Friday, JAL and ANA cancelling Thursday and Friday)
- NBC News, Airport closes in Okinawa as Typhoon Dolphin hits parts of southern Japan (Naha closure, 500+ cancellations, bus and monorail suspension)
- Typhoon Dolphin (2026) (peak intensity 910 hPa, weakening to Category 1 on 5 August, direct landfall over Kume Island)
- Naha Airport 2024 traffic: Naha Airport
- ANA Holdings, financial results (domestic load factor)
- JAL, Group consolidated financial results
The 115 per cent share, the spare-seat figures and the clearance times are arithmetic on the published traffic and load-factor numbers rather than separately published figures.
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