A graphical symbol of measurement used on weather charts to display wind direction and speeds. The barb points to the direction toward which the wind is blowing. On the tail of the barb are lines and flags to indicate the wind speed. A half line extending off the tail of the barb represents 5 knots; a full line is 10 knots; and each flag is 50 knots. The combinations of these lines and flags represent the sustained wind speed at the barb location.