factsheet_17-observations_over_land_2023.pdf
a period of ten minutes. Terms such as ‘severe gale’, ‘storm’, etc are also used to describe winds of 41 knots or greater. 50 Wind speed (knots) 40 30 20 10 Maximum 3 second gust Mean 10 minute wind speed 0 0000 0600 1200 1800 2400 Time Figure 17. Wind speed at Prestwick airport on 22 November 2009