Graphs can display windbarbs on any trace, similar to errorbars. These are standard northern hemisphere (flag on the clockwise side) windbarbs. Speed can be displayed using either flags, length or both. The flags are also colored based on NOAA color standards. To create flags, enter expressions for Direction, Speed and Length in the new boxes on the trace property sheet of the 2D graph property box. Any of these expressions can be scalar if you want fixed values. For example, to display flags of fixed length, enter a scalar value for the length expression (in pixels). Speed is in whatever units you want. The flags display based on unitless values, short flag for 5, long flag for 10, 20, etc, and triangle flag for 50. The flag used is determined by the speed rounded to the nearest 5. To hide all flags, enter 0 for the speed expression. Color is based on actual speed value. Direction is in degrees. Flags are displayed right on the trace. To display them elsewhere, make an additional trace to tag them to.
