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Related to wind velocity: Wind speed
wind velocity[′win və‚läs·əd·ē]
The speed and direction of wind.
The speed and direction of the wind is called wind velocity. It is expressed in five or six digits—the first three indicating the true direction from which the wind is blowing and the last two or three digits indicating the speed in knots. Thus, if the wind is blowing at 25 knots from the west, it will be expressed as 270/25. If the wind speed is, however, 120 knots, it will be expressed as 270/120.