Cumulus Support

G'day all, present wind speed is 28.1kmh, average 27kmh ) Gusting to nearly 38kmh) this is described as a moderate breeze (F4) just wondering what the criteria is.....went surfing this morning nearly got blown of my board......haha
cheers wheels

Many references accross the net, wiki is as good as any :-

http://en.wikipedia.org/wiki/Beaufort_scale