Latest news, Jul 15, 2026: Announcing BumpySkies First Class, a new subscription tier that lets you financially support this site while enjoying premium features. For starters, you can now have BumpySkies text you when your flight's turbulence forecast is ready! Read all about it in the latest newsletter.

CAL021, SEA to TPE, departing 2:08 AM PDT, Jul 27

Turbulence forecast map for CAL021, SEA to TPE

Report an issue

(Forecast data last collected at 5:00 AM PDT on Jul 27, 2026.)

  1. Takeoff from SEA at 2:08 AM PDT, Jul 27.
  2. 2:09 AM PDT: Light turbulence likely for the next 30 minutes.
  3. 2:39 AM PDT: Calm skies for the next 1 hour and 34 minutes.
  4. 4:13 AM PDT: Light turbulence likely for the next 1 hour and 2 minutes.
  5. 5:15 AM PDT: Moderate turbulence likely for the next 3 minutes.
  6. 5:18 AM PDT: Light turbulence likely for the next 2 hours and 21 minutes.
  7. 7:39 AM PDT: Moderate turbulence likely for the next 2 minutes.
  8. 7:41 AM PDT: Light turbulence likely for the next 41 minutes.
  9. 8:22 AM PDT: Calm skies for the next 39 minutes.
  10. 9:01 AM PDT: Light turbulence likely for the next 1 hour and 13 minutes.
  11. 10:14 AM PDT: Calm skies for the next 29 minutes.
  12. 10:43 AM PDT: Light turbulence likely for the next 1 hour and 9 minutes.
  13. 11:52 AM PDT: Calm skies for the next 39 minutes.
  14. 12:31 PM PDT: Light turbulence likely for the next 27 minutes.
  15. 12:58 PM PDT: Calm skies for the rest of the flight.
  16. Landing at TPE at 1:30 PM PDT.

Get notified about a future CAL021 flight First Class

Nelly

Nelly says: Bumpy skies can be scary, but they're not dangerous!

See our turbulence safety page for more information, including links to other resources for nervous fliers.

šŸ“£ To stay informed about updates to BumpySkies, subscribe to the free newsletter:

You can also browse past newsletter issues.

BumpySkies is free, and stays online thanks to its subscribers.

If you find this service helpful, please consider subscribing to BumpySkies First Class. For $5 a month you'll help keep BumpySkies runningā€”and you can set up turbulence-forecast notifications for your own flights.

For best results, try it shortly before departure.

(Or, see a random upcoming flight's forecast.)