I think the wind chart is informative, however I it must be clarified that the speeds are in meters per second. So here is some additional information to better use the chart information.

1 metre per second (m/s, ms-1) = 2.237 miles per hour (mph) 1 metre per second (m/s, ms-1) = 1.9426 Knots (Kts)* 1 metre per second (m/s, ms-1) = 3.60 kilometres per ...