Weather theoryQuestion 352 of 934

When can a pilot expect icing near a thunderstorm?

  1. Only when the air is clear and the temperature is below minus 40 °C
  2. When the temperature nears 0 °C and visible moisture is present
  3. Only when the airplane is in clear air at least 10 miles from a storm
  4. Only when the airplane climbs above 30,000 feet in the anvil
Show answer

Correct answer: When the temperature nears 0 °C and visible moisture is present

Thunderstorm updrafts carry supercooled water above the freezing level. Icing can be very rapid.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 12: Weather Theory — Thunderstorms, page 308

Practice weather theory

Questions last reviewed: 18 October 2026