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Cloud detection ceiling of automated stations

Remote Pilot (Part 107) practice question 1 of 18 on Weather / Sources. ACS element UA.III.A.K4 · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONClouds above what height are not detected or reported by an automated weather station?

  1. A10,000 feet
  2. B18,000 feet MSL
  3. C12,000 feet
Show the answer and explanation

Correct answer: C. 12,000 feet

  • A — incorrect The limit given in the study guide is 12,000 feet, not 10,000 feet.
  • B — incorrect 18,000 feet MSL is not the automated station cloud detection limit; the study guide gives 12,000 feet.
  • C — correct The study guide states that clouds above 12,000 feet are not detected or reported by an automated station.

BACKGROUND

The sky condition group of a METAR reports cloud amount, height, and type, with heights given in hundreds of feet above ground level. When the observation comes from an automated station, clouds above 12,000 feet are not detected or reported. This means an automated report may show a clear sky or only lower layers even when higher clouds are present. Automated sources such as the Automated Surface Observing System (ASOS) and Automated Weather Observing System (AWOS) supply a large share of surface observations, so a remote pilot should understand this limitation when reading a report marked AUTO.

STUDY TIP

When a report carries the AUTO modifier, treat any cloud information as covering only layers up to 12,000 feet. Higher clouds may exist without being reported.

KEY POINTS

  • Automated stations do not detect or report clouds above 12,000 feet.
  • The AUTO modifier tells you the report came from such a station.
  • METAR cloud heights are in hundreds of feet AGL.

SOURCES

  • remote_pilot_study_guide.txt, Chapter 3a "Aviation Routine Weather Report (METAR)", item 8 Sky condition
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MORE ON WEATHER / SOURCES

SkyDrill is not affiliated with the FAA. This is an original practice item based on 14 CFR part 107, 14 CFR part 89, and the FAA Remote Pilot – Small UAS Study Guide (FAA-G-8082-22). Regulations and handbooks are revised; confirm details against the current edition.