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A Convective SIGMET is issued for severe thunderstorms with surface winds of at least how much?

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  1. 30 knots
  2. 50 knots
  3. 15 knots

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References

  1. Aeronautical Information Manual 7-1, Meteorology www.faa.gov/air_traffic/publications/atpubs/aim_html/chap7_section_1.html Checked 2026-10-09.

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