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Ask the Weather Guys: What is the Beaufort scale?

A: The Beaufort scale is a method of estimating wind speed based on the general condition of the surface of a large body of water with respect to wind waves and swell. This scale allows sailors to estimate the wind speed just by observing the state of the sea surface. The scale has a long history, but was finalized in 1805 by Rear Admiral Sir Francis Beaufort, an Irish hydrographer in the British Royal Navy.