Beaufort wind scale

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Beaufort wind scale Range of numbers from 0–17 representing the force of winds, together with descriptions of the corresponding land or sea effects. Beaufort 0 means calm wind less than 1km/h (0.6mph), with smoke rising vertically. Beaufort 3 means light breeze, 12–19km/h (8–12mph), with leaves in constant motion. Beaufort 11 is a storm, 103–116km/h (64–72mph). Beaufort 12–17 is a hurricane, 117.5–219+km/h (73–136+mph), with devastation. The scale is named after its inventor, Admiral Sir Francis Beaufort (1774–1857).

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Beaufort wind scale