SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/drone-lenticular-clouds-turbulence

Smooth, lens-shaped standing clouds sit over mountains. What do they warn you about?

Very strong turbulence from mountain waves. Avoid them.

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  1. Very strong turbulence ✔
  2. Calm, stable air ideal for flying
  3. Freezing rain at ground level

Why: Standing lenticular clouds form on the crests of waves made by wind flowing over barriers. They barely move, but the wind through them can be very strong, so the FAA says to avoid them.

Huh, didn't know that: Their smooth, polished edges are the classic way to recognize them.

The dad joke
Why do lenticular clouds look like UFOs? They're trying to get a rise out of you.
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References

Answer: Very strong turbulence. Standing lenticular clouds form on the crests of waves made by wind flowing over barriers. They barely move, but the wind through them can be very strong, so the FAA says to avoid them.

  1. Remote Pilot sUAS Study Guide (FAA-G-8082-22), Chapter 3b www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/remote_pilot_study_guide.pdf
    The presence of these clouds is a good indication of very strong turbulence and should be avoided.
    Checked 2026-10-09.

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