Latest news, Aug 3, 2026: I've been updating how BumpySkies treats airport elevations, forecasts climb and descent rates, and classifies turbulence intensity, all based on real-world guidance. More about it in the next newsletter. Until then, if anything seems off, please report an issue!

UAL948, SFO to LHR, departing 5:14 PM PDT, Aug 11

Turbulence forecast map for UAL948, SFO to LHR

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(Forecast data last collected at 10:00 AM PDT on Aug 11, 2026.)

Preliminary forecast. Check back within an hour or two of takeoff to see the most accurate route map and turbulence forecast for this flight.

  1. Takeoff from SFO at 5:14 PM PDT, Aug 11.
  2. 5:15 PM PDT: Calm skies for the next 1 minute.
  3. 5:16 PM PDT: Light turbulence likely for the next 16 minutes.
  4. 5:32 PM PDT: Moderate turbulence likely for the next 4 minutes.
  5. 5:36 PM PDT: Light turbulence likely for the next 24 minutes.
  6. 6:00 PM PDT: Moderate turbulence likely for the next 1 minute.
  7. 6:01 PM PDT: Light turbulence likely for the next 5 minutes.
  8. 6:06 PM PDT: Calm skies for the next 2 hours and 22 minutes.
  9. 8:28 PM PDT: Light turbulence likely for the next 12 minutes.
  10. 8:40 PM PDT: Calm skies for the next 1 hour and 15 minutes.
  11. 9:55 PM PDT: Light turbulence likely for the next 13 minutes.
  12. 10:08 PM PDT: Calm skies for the next 14 minutes.
  13. 10:22 PM PDT: Light turbulence likely for the next 3 minutes.
  14. 10:25 PM PDT: Severe turbulence likely for the next 1 minute.
  15. 10:26 PM PDT: Moderate turbulence likely for the next 1 minute.
  16. 10:27 PM PDT: Light turbulence likely for the next 11 minutes.
  17. 10:38 PM PDT: Moderate turbulence likely for the next 3 minutes.
  18. 10:41 PM PDT: Light turbulence likely for the next 4 minutes.
  19. 10:45 PM PDT: Moderate turbulence likely for the next 2 minutes.
  20. 10:47 PM PDT: Light turbulence likely for the next 19 minutes.
  21. 11:06 PM PDT: Moderate turbulence likely for the next 2 minutes.
  22. 11:08 PM PDT: Light turbulence likely for the next 33 minutes.
  23. 11:41 PM PDT: Calm skies for the next 43 minutes.
  24. 12:24 AM PDT: Light turbulence likely for the next 48 minutes.
  25. 1:12 AM PDT: Moderate turbulence likely for the next 2 minutes.
  26. 1:14 AM PDT: Light turbulence likely for the next 5 minutes.
  27. 1:19 AM PDT: Calm skies for the next 12 minutes.
  28. 1:31 AM PDT: Light turbulence likely for the next 17 minutes.
  29. 1:48 AM PDT: Moderate turbulence likely for the next 1 minute.
  30. 1:49 AM PDT: Light turbulence likely for the next 18 minutes.
  31. 2:07 AM PDT: Calm skies for the next 36 minutes.
  32. 2:43 AM PDT: Light turbulence likely until you land.
  33. Landing at LHR at 3:01 AM PDT.

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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.

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