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Weather servicesQuestion 381 of 934

For which hazard is a SIGMET issued over the contiguous U.S.?

  1. Moderate icing in clouds above the freezing level
  2. Severe icing not associated with thunderstorms
  3. Light turbulence below 5,000 feet
  4. Mountain obscuration over a small area
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Correct answer: Severe icing not associated with thunderstorms

SIGMETs cover severe icing, severe or extreme turbulence, widespread dust or sandstorms, and volcanic ash.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 7-1-6 Inflight Aviation Weather Advisories, page 528

Practice weather services

Questions last reviewed: 18 October 2026