Stable air usually brings which combination?

Poor visibility and steady precipitation, with smooth air and flat layered clouds.

  1. Poor visibility and steady precipitation ✔
  2. Good visibility and pop-up showers
  3. Rough air and towering clouds

Why: Stable air resists rising, so clouds spread out in flat layers. You get smooth air, but haze, fog and steady rain or drizzle can hang around.

Huh, didn't know that: Stratiform clouds and fog are the classic stable-air clouds; cumuliform clouds signal unstable air.

The dad joke
Why did the cloud break up with the fog? It needed some space.
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Sources

  1. FAA Remote Pilot Study Guide (FAA-G-8082-22), Ch. 3b https://www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/remote_pilot_study_guide.pdf

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