What is the range of the scale which measures wind speed?

The Beaufort Wind scale is commonly used to measure wind speed at sea. It was developed by Sir Francis Beaufort, an officer in the Royal Navy of the U.K., in 1805. This scale divides wind conditions into 13 categories, ranging from 0 to 12. At the lowest level, 0, the wind speed is less than 1 knot and the sea is calm. At the other end of the scale, level 12, the wind speed is more than 64 knots and the conditions can be described as those of a hurricane, with wave heights of 45 feet or more.

Another scale is commonly used to measure wind speed and is known as the Saffir-Simpson scale. This scale provides a rating of 1 to 5 to the wind speed in hurricane conditions. At category 1, the wind speeds are 64-82 knots. A major storm, on the other hand, is denoted by category 5 and has wind speeds of 137 knots or higher.

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