Weather servicesQuestion 402 of 934

A radar display shows no echoes. What does this mean?

  1. There is no significant weather within the radar coverage
  2. There is no turbulence or icing within the radar coverage area
  3. All precipitation in the area has already ended
  4. Significant weather can still exist, such as clouds and fog
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Correct answer: Significant weather can still exist, such as clouds and fog

Radar shows precipitation, not clouds or fog.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 7-1-11 Weather Radar Services, page 552

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Questions last reviewed: 18 October 2026